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Diffstat (limited to 'src/test/java/org/apache/commons/lang3/ClassUtilsTest.java')
| -rw-r--r-- | src/test/java/org/apache/commons/lang3/ClassUtilsTest.java | 1523 |
1 files changed, 1523 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/ClassUtilsTest.java b/src/test/java/org/apache/commons/lang3/ClassUtilsTest.java new file mode 100644 index 000000000..0050753bd --- /dev/null +++ b/src/test/java/org/apache/commons/lang3/ClassUtilsTest.java @@ -0,0 +1,1523 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.commons.lang3; + +import static org.junit.jupiter.api.Assertions.assertArrayEquals; +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertFalse; +import static org.junit.jupiter.api.Assertions.assertNotNull; +import static org.junit.jupiter.api.Assertions.assertNotSame; +import static org.junit.jupiter.api.Assertions.assertNull; +import static org.junit.jupiter.api.Assertions.assertSame; +import static org.junit.jupiter.api.Assertions.assertThrows; +import static org.junit.jupiter.api.Assertions.assertTrue; + +import java.lang.reflect.Constructor; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashSet; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.TreeMap; + +import org.apache.commons.lang3.ClassUtils.Interfaces; +import org.apache.commons.lang3.reflect.testbed.GenericConsumer; +import org.apache.commons.lang3.reflect.testbed.GenericParent; +import org.apache.commons.lang3.reflect.testbed.StringParameterizedChild; +import org.junit.jupiter.api.Assertions; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; + +/** + * Unit tests {@link org.apache.commons.lang3.ClassUtils}. + */ +@SuppressWarnings("boxing") // JUnit4 does not support primitive equality testing apart from long +public class ClassUtilsTest extends AbstractLangTest { + + private static final String OBJECT_CANONICAL_NAME = "java.lang.Object"; + + private static class CX implements IB, IA, IE { + // empty + } + + @SuppressWarnings("unused") // IB is redundant but what a test checks + private static class CY extends CX implements IB, IC { + // empty + } + + private interface IA { + // empty + } + + private interface IB { + // empty + } + + private interface IC extends ID, IE { + // empty + } + + private interface ID { + // empty + } + + private interface IE extends IF { + // empty + } + + private interface IF { + // empty + } + + private static class Inner { + private class DeeplyNested { + // empty + } + } + + private void assertGetClassReturnsClass(final Class<?> c) throws Exception { + assertEquals(c, ClassUtils.getClass(c.getName())); + } + + private void assertGetClassThrowsClassNotFound(final String className) { + assertGetClassThrowsException(className, ClassNotFoundException.class); + } + + private void assertGetClassThrowsException(final String className, final Class<? extends Exception> exceptionType) { + assertThrows(exceptionType, () -> ClassUtils.getClass(className), + "ClassUtils.getClass() should fail with an exception of type " + exceptionType.getName() + " when given class name \"" + className + "\"."); + } + + private void assertGetClassThrowsNullPointerException(final String className) { + assertGetClassThrowsException(className, NullPointerException.class); + } + + @Test + public void test_convertClassesToClassNames_List() { + final List<Class<?>> list = new ArrayList<>(); + List<String> result = ClassUtils.convertClassesToClassNames(list); + assertEquals(0, result.size()); + + list.add(String.class); + list.add(null); + list.add(Object.class); + result = ClassUtils.convertClassesToClassNames(list); + assertEquals(3, result.size()); + assertEquals("java.lang.String", result.get(0)); + assertNull(result.get(1)); + assertEquals(OBJECT_CANONICAL_NAME, result.get(2)); + + @SuppressWarnings("unchecked") // test what happens when non-generic code adds wrong type of element + final List<Object> olist = (List<Object>) (List<?>) list; + olist.add(new Object()); + assertThrows(ClassCastException.class, () -> ClassUtils.convertClassesToClassNames(list), "Should not have been able to convert list"); + assertNull(ClassUtils.convertClassesToClassNames(null)); + } + + @Test + public void test_convertClassNamesToClasses_List() { + final List<String> list = new ArrayList<>(); + List<Class<?>> result = ClassUtils.convertClassNamesToClasses(list); + assertEquals(0, result.size()); + + list.add("java.lang.String"); + list.add("java.lang.xxx"); + list.add(OBJECT_CANONICAL_NAME); + result = ClassUtils.convertClassNamesToClasses(list); + assertEquals(3, result.size()); + assertEquals(String.class, result.get(0)); + assertNull(result.get(1)); + assertEquals(Object.class, result.get(2)); + + @SuppressWarnings("unchecked") // test what happens when non-generic code adds wrong type of element + final List<Object> olist = (List<Object>) (List<?>) list; + olist.add(new Object()); + assertThrows(ClassCastException.class, () -> ClassUtils.convertClassNamesToClasses(list), "Should not have been able to convert list"); + assertNull(ClassUtils.convertClassNamesToClasses(null)); + } + + @Test + public void test_getAbbreviatedName_Class() { + assertEquals("", ClassUtils.getAbbreviatedName((Class<?>) null, 1)); + assertEquals("j.l.String", ClassUtils.getAbbreviatedName(String.class, 1)); + assertEquals("j.l.String", ClassUtils.getAbbreviatedName(String.class, 5)); + assertEquals("o.a.c.l.ClassUtils", ClassUtils.getAbbreviatedName(ClassUtils.class, 18)); + assertEquals("j.lang.String", ClassUtils.getAbbreviatedName(String.class, 13)); + assertEquals("j.lang.String", ClassUtils.getAbbreviatedName(String.class, 15)); + assertEquals("java.lang.String", ClassUtils.getAbbreviatedName(String.class, 20)); + } + + @Test + @DisplayName("When the desired length is negative then exception is thrown") + public void test_getAbbreviatedName_Class_NegativeLen() { + assertThrows(IllegalArgumentException.class, () -> ClassUtils.getAbbreviatedName(String.class, -10)); + } + + @Test + @DisplayName("When the desired length is zero then exception is thrown") + public void test_getAbbreviatedName_Class_ZeroLen() { + assertThrows(IllegalArgumentException.class, () -> ClassUtils.getAbbreviatedName(String.class, 0)); + } + + @Test + public void test_getAbbreviatedName_String() { + assertEquals("", ClassUtils.getAbbreviatedName((String) null, 1)); + assertEquals("", ClassUtils.getAbbreviatedName("", 1)); + assertEquals("WithoutPackage", ClassUtils.getAbbreviatedName("WithoutPackage", 1)); + assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", 1)); + assertEquals("o.a.c.l.ClassUtils", ClassUtils.getAbbreviatedName("org.apache.commons.lang3.ClassUtils", 18)); + assertEquals("org.apache.commons.lang3.ClassUtils", + ClassUtils.getAbbreviatedName("org.apache.commons.lang3.ClassUtils", "org.apache.commons.lang3.ClassUtils".length())); + assertEquals("o.a.c.l.ClassUtils", ClassUtils.getAbbreviatedName("o.a.c.l.ClassUtils", 18)); + assertEquals("o..c.l.ClassUtils", ClassUtils.getAbbreviatedName("o..c.l.ClassUtils", 18)); + assertEquals(".", ClassUtils.getAbbreviatedName(".", 18)); + assertEquals(".", ClassUtils.getAbbreviatedName(".", 1)); + assertEquals("..", ClassUtils.getAbbreviatedName("..", 1)); + assertEquals("...", ClassUtils.getAbbreviatedName("...", 2)); + assertEquals("...", ClassUtils.getAbbreviatedName("...", 3)); + assertEquals("java.lang.String", ClassUtils.getAbbreviatedName("java.lang.String", Integer.MAX_VALUE)); + assertEquals("j.lang.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.lang.String".length())); + assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.lang.String".length() - 1)); + assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.l.String".length())); + assertEquals("j.l.String", ClassUtils.getAbbreviatedName("java.lang.String", "j.l.String".length() - 1)); + } + + /** + * Test that in case the required length is larger than the name and thus there is no need for any shortening then the + * returned string object is the same as the one passed as argument. Note, however, that this is tested as an internal + * implementation detail, but it is not a guaranteed feature of the implementation. + */ + @Test + @DisplayName("When the length hint is longer than the actual length then the same String object is returned") + public void test_getAbbreviatedName_TooLongHint() { + final String className = "java.lang.String"; + Assertions.assertSame(className, ClassUtils.getAbbreviatedName(className, className.length() + 1)); + Assertions.assertSame(className, ClassUtils.getAbbreviatedName(className, className.length())); + } + + @Test + public void test_getAllInterfaces_Class() { + final List<?> list = ClassUtils.getAllInterfaces(CY.class); + assertEquals(6, list.size()); + assertEquals(IB.class, list.get(0)); + assertEquals(IC.class, list.get(1)); + assertEquals(ID.class, list.get(2)); + assertEquals(IE.class, list.get(3)); + assertEquals(IF.class, list.get(4)); + assertEquals(IA.class, list.get(5)); + + assertNull(ClassUtils.getAllInterfaces(null)); + } + + @Test + public void test_getAllSuperclasses_Class() { + final List<?> list = ClassUtils.getAllSuperclasses(CY.class); + assertEquals(2, list.size()); + assertEquals(CX.class, list.get(0)); + assertEquals(Object.class, list.get(1)); + + assertNull(ClassUtils.getAllSuperclasses(null)); + } + + @Test + public void test_getCanonicalName_Class() { + assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getCanonicalName(ClassUtils.class)); + assertEquals("java.util.Map.Entry", ClassUtils.getCanonicalName(Map.Entry.class)); + assertEquals("", ClassUtils.getCanonicalName((Class<?>) null)); + + assertEquals("java.lang.String[]", ClassUtils.getCanonicalName(String[].class)); + assertEquals("java.util.Map.Entry[]", ClassUtils.getCanonicalName(Map.Entry[].class)); + + // Primitives + assertEquals("boolean", ClassUtils.getCanonicalName(boolean.class)); + assertEquals("byte", ClassUtils.getCanonicalName(byte.class)); + assertEquals("char", ClassUtils.getCanonicalName(char.class)); + assertEquals("short", ClassUtils.getCanonicalName(short.class)); + assertEquals("int", ClassUtils.getCanonicalName(int.class)); + assertEquals("long", ClassUtils.getCanonicalName(long.class)); + assertEquals("float", ClassUtils.getCanonicalName(float.class)); + assertEquals("double", ClassUtils.getCanonicalName(double.class)); + + // Primitive Arrays + assertEquals("boolean[]", ClassUtils.getCanonicalName(boolean[].class)); + assertEquals("byte[]", ClassUtils.getCanonicalName(byte[].class)); + assertEquals("char[]", ClassUtils.getCanonicalName(char[].class)); + assertEquals("short[]", ClassUtils.getCanonicalName(short[].class)); + assertEquals("int[]", ClassUtils.getCanonicalName(int[].class)); + assertEquals("long[]", ClassUtils.getCanonicalName(long[].class)); + assertEquals("float[]", ClassUtils.getCanonicalName(float[].class)); + assertEquals("double[]", ClassUtils.getCanonicalName(double[].class)); + + // Arrays of arrays of ... + assertEquals("java.lang.String[][]", ClassUtils.getCanonicalName(String[][].class)); + assertEquals("java.lang.String[][][]", ClassUtils.getCanonicalName(String[][][].class)); + assertEquals("java.lang.String[][][][]", ClassUtils.getCanonicalName(String[][][][].class)); + + // Inner types + class Named { + // empty + } + assertEquals(StringUtils.EMPTY, ClassUtils.getCanonicalName(new Object() { + // empty + }.getClass())); + assertEquals(StringUtils.EMPTY, ClassUtils.getCanonicalName(Named.class)); + assertEquals("org.apache.commons.lang3.ClassUtilsTest.Inner", ClassUtils.getCanonicalName(Inner.class)); + } + + @Test + public void test_getCanonicalName_Class_String() { + assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getCanonicalName(ClassUtils.class, "X")); + assertEquals("java.util.Map.Entry", ClassUtils.getCanonicalName(Map.Entry.class, "X")); + assertEquals("X", ClassUtils.getCanonicalName((Class<?>) null, "X")); + + assertEquals("java.lang.String[]", ClassUtils.getCanonicalName(String[].class, "X")); + assertEquals("java.util.Map.Entry[]", ClassUtils.getCanonicalName(Map.Entry[].class, "X")); + + // Primitives + assertEquals("boolean", ClassUtils.getCanonicalName(boolean.class, "X")); + assertEquals("byte", ClassUtils.getCanonicalName(byte.class, "X")); + assertEquals("char", ClassUtils.getCanonicalName(char.class, "X")); + assertEquals("short", ClassUtils.getCanonicalName(short.class, "X")); + assertEquals("int", ClassUtils.getCanonicalName(int.class, "X")); + assertEquals("long", ClassUtils.getCanonicalName(long.class, "X")); + assertEquals("float", ClassUtils.getCanonicalName(float.class, "X")); + assertEquals("double", ClassUtils.getCanonicalName(double.class, "X")); + + // Primitive Arrays + assertEquals("boolean[]", ClassUtils.getCanonicalName(boolean[].class, "X")); + assertEquals("byte[]", ClassUtils.getCanonicalName(byte[].class, "X")); + assertEquals("char[]", ClassUtils.getCanonicalName(char[].class, "X")); + assertEquals("short[]", ClassUtils.getCanonicalName(short[].class, "X")); + assertEquals("int[]", ClassUtils.getCanonicalName(int[].class, "X")); + assertEquals("long[]", ClassUtils.getCanonicalName(long[].class, "X")); + assertEquals("float[]", ClassUtils.getCanonicalName(float[].class, "X")); + assertEquals("double[]", ClassUtils.getCanonicalName(double[].class, "X")); + + // Arrays of arrays of ... + assertEquals("java.lang.String[][]", ClassUtils.getCanonicalName(String[][].class, "X")); + assertEquals("java.lang.String[][][]", ClassUtils.getCanonicalName(String[][][].class, "X")); + assertEquals("java.lang.String[][][][]", ClassUtils.getCanonicalName(String[][][][].class, "X")); + + // Inner types + class Named { + // empty + } + assertEquals("X", ClassUtils.getCanonicalName(new Object() { + // empty + }.getClass(), "X")); + assertEquals("X", ClassUtils.getCanonicalName(Named.class, "X")); + assertEquals("org.apache.commons.lang3.ClassUtilsTest.Inner", ClassUtils.getCanonicalName(Inner.class, "X")); + assertEquals("X", ClassUtils.getCanonicalName((Object) null, "X")); + assertEquals(OBJECT_CANONICAL_NAME, ClassUtils.getCanonicalName(new Object())); + } + + @Test + public void test_getClass() { + // assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getName(ClassLoader.class, "@")); + } + + @Test + public void test_getName_Class() { + assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getName(ClassUtils.class)); + assertEquals("java.util.Map$Entry", ClassUtils.getName(Map.Entry.class)); + assertEquals("", ClassUtils.getName((Class<?>) null)); + + assertEquals("[Ljava.lang.String;", ClassUtils.getName(String[].class)); + assertEquals("[Ljava.util.Map$Entry;", ClassUtils.getName(Map.Entry[].class)); + + // Primitives + assertEquals("boolean", ClassUtils.getName(boolean.class)); + assertEquals("byte", ClassUtils.getName(byte.class)); + assertEquals("char", ClassUtils.getName(char.class)); + assertEquals("short", ClassUtils.getName(short.class)); + assertEquals("int", ClassUtils.getName(int.class)); + assertEquals("long", ClassUtils.getName(long.class)); + assertEquals("float", ClassUtils.getName(float.class)); + assertEquals("double", ClassUtils.getName(double.class)); + + // Primitive Arrays + assertEquals("[Z", ClassUtils.getName(boolean[].class)); + assertEquals("[B", ClassUtils.getName(byte[].class)); + assertEquals("[C", ClassUtils.getName(char[].class)); + assertEquals("[S", ClassUtils.getName(short[].class)); + assertEquals("[I", ClassUtils.getName(int[].class)); + assertEquals("[J", ClassUtils.getName(long[].class)); + assertEquals("[F", ClassUtils.getName(float[].class)); + assertEquals("[D", ClassUtils.getName(double[].class)); + + // Arrays of arrays of ... + assertEquals("[[Ljava.lang.String;", ClassUtils.getName(String[][].class)); + assertEquals("[[[Ljava.lang.String;", ClassUtils.getName(String[][][].class)); + assertEquals("[[[[Ljava.lang.String;", ClassUtils.getName(String[][][][].class)); + + // Inner types + class Named { + // empty + } + assertEquals("org.apache.commons.lang3.ClassUtilsTest$3", ClassUtils.getName(new Object() { + // empty + }.getClass())); + assertEquals("org.apache.commons.lang3.ClassUtilsTest$3Named", ClassUtils.getName(Named.class)); + assertEquals("org.apache.commons.lang3.ClassUtilsTest$Inner", ClassUtils.getName(Inner.class)); + assertEquals(OBJECT_CANONICAL_NAME, ClassUtils.getName(new Object())); + } + + @Test + public void test_getName_Object() { + assertEquals("org.apache.commons.lang3.ClassUtils", ClassUtils.getName(new ClassUtils(), "<null>")); + assertEquals("org.apache.commons.lang3.ClassUtilsTest$Inner", ClassUtils.getName(new Inner(), "<null>")); + assertEquals("java.lang.String", ClassUtils.getName("hello", "<null>")); + assertEquals("<null>", ClassUtils.getName(null, "<null>")); + + // Inner types + class Named { + // empty + } + assertEquals("org.apache.commons.lang3.ClassUtilsTest$4", ClassUtils.getName(new Object() { + // empty + }, "<null>")); + assertEquals("org.apache.commons.lang3.ClassUtilsTest$4Named", ClassUtils.getName(new Named(), "<null>")); + assertEquals("org.apache.commons.lang3.ClassUtilsTest$Inner", ClassUtils.getName(new Inner(), "<null>")); + } + + @Test + public void test_getPackageCanonicalName_Class() { + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(ClassUtils.class)); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(ClassUtils[].class)); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(ClassUtils[][].class)); + assertEquals("", ClassUtils.getPackageCanonicalName(int[].class)); + assertEquals("", ClassUtils.getPackageCanonicalName(int[][].class)); + + // Inner types + class Named { + // empty + } + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Object() { + // empty + }.getClass())); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(Named.class)); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(Inner.class)); + assertEquals(StringUtils.EMPTY, ClassUtils.getPackageCanonicalName((Class<?>) null)); + } + + @Test + public void test_getPackageCanonicalName_Object() { + assertEquals("<null>", ClassUtils.getPackageCanonicalName(null, "<null>")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new ClassUtils(), "<null>")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new ClassUtils[0], "<null>")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new ClassUtils[0][0], "<null>")); + assertEquals("", ClassUtils.getPackageCanonicalName(new int[0], "<null>")); + assertEquals("", ClassUtils.getPackageCanonicalName(new int[0][0], "<null>")); + + // Inner types + class Named { + // empty + } + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Object() { + // empty + }, "<null>")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Named(), "<null>")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName(new Inner(), "<null>")); + } + + @Test + public void test_getPackageCanonicalName_String() { + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtils")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("[Lorg.apache.commons.lang3.ClassUtils;")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("[[Lorg.apache.commons.lang3.ClassUtils;")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtils[]")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtils[][]")); + assertEquals("", ClassUtils.getPackageCanonicalName("[I")); + assertEquals("", ClassUtils.getPackageCanonicalName("[[I")); + assertEquals("", ClassUtils.getPackageCanonicalName("int[]")); + assertEquals("", ClassUtils.getPackageCanonicalName("int[][]")); + + // Inner types + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtilsTest$6")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtilsTest$5Named")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageCanonicalName("org.apache.commons.lang3.ClassUtilsTest$Inner")); + } + + @Test + public void test_getPackageName_Class() { + assertEquals("java.lang", ClassUtils.getPackageName(String.class)); + assertEquals("java.util", ClassUtils.getPackageName(Map.Entry.class)); + assertEquals("", ClassUtils.getPackageName((Class<?>) null)); + + // LANG-535 + assertEquals("java.lang", ClassUtils.getPackageName(String[].class)); + + // Primitive Arrays + assertEquals("", ClassUtils.getPackageName(boolean[].class)); + assertEquals("", ClassUtils.getPackageName(byte[].class)); + assertEquals("", ClassUtils.getPackageName(char[].class)); + assertEquals("", ClassUtils.getPackageName(short[].class)); + assertEquals("", ClassUtils.getPackageName(int[].class)); + assertEquals("", ClassUtils.getPackageName(long[].class)); + assertEquals("", ClassUtils.getPackageName(float[].class)); + assertEquals("", ClassUtils.getPackageName(double[].class)); + + // Arrays of arrays of ... + assertEquals("java.lang", ClassUtils.getPackageName(String[][].class)); + assertEquals("java.lang", ClassUtils.getPackageName(String[][][].class)); + assertEquals("java.lang", ClassUtils.getPackageName(String[][][][].class)); + + // On-the-fly types + class Named { + // empty + } + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(new Object() { + // empty + }.getClass())); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(Named.class)); + } + + @Test + public void test_getPackageName_Object() { + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(new ClassUtils(), "<null>")); + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(new Inner(), "<null>")); + assertEquals("<null>", ClassUtils.getPackageName(null, "<null>")); + } + + @Test + public void test_getPackageName_String() { + assertEquals("org.apache.commons.lang3", ClassUtils.getPackageName(ClassUtils.class.getName())); + assertEquals("java.util", ClassUtils.getPackageName(Map.Entry.class.getName())); + assertEquals("", ClassUtils.getPackageName((String) null)); + assertEquals("", ClassUtils.getPackageName("")); + } + + @Test + public void test_getShortCanonicalName_Class() { + assertEquals("ClassUtils", ClassUtils.getShortCanonicalName(ClassUtils.class)); + assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName(ClassUtils[].class)); + assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName(ClassUtils[][].class)); + assertEquals("int[]", ClassUtils.getShortCanonicalName(int[].class)); + assertEquals("int[][]", ClassUtils.getShortCanonicalName(int[][].class)); + + // Inner types + class Named { + // empty + } + assertEquals("", ClassUtils.getShortCanonicalName(new Object() { + // empty + }.getClass())); + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("", ClassUtils.getShortCanonicalName(Named.class)); + assertEquals("Inner", ClassUtils.getShortCanonicalName(Inner.class)); + assertEquals(StringUtils.EMPTY, ClassUtils.getShortCanonicalName((Class<?>) null)); + } + + @Test + public void test_getShortCanonicalName_Object() { + assertEquals("<null>", ClassUtils.getShortCanonicalName(null, "<null>")); + assertEquals("ClassUtils", ClassUtils.getShortCanonicalName(new ClassUtils(), "<null>")); + assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName(new ClassUtils[0], "<null>")); + assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName(new ClassUtils[0][0], "<null>")); + assertEquals("int[]", ClassUtils.getShortCanonicalName(new int[0], "<null>")); + assertEquals("int[][]", ClassUtils.getShortCanonicalName(new int[0][0], "<null>")); + + // Inner types + class Named { + // empty + } + assertEquals("", ClassUtils.getShortCanonicalName(new Object() { + // empty + }, "<null>")); + assertEquals("", ClassUtils.getShortCanonicalName(new Named(), "<null>")); + assertEquals("Inner", ClassUtils.getShortCanonicalName(new Inner(), "<null>")); + } + + @Test + public void test_getShortCanonicalName_String() { + assertEquals("", ClassUtils.getShortCanonicalName((String) null)); + assertEquals("Map.Entry", ClassUtils.getShortCanonicalName(java.util.Map.Entry.class.getName())); + assertEquals("Entry", ClassUtils.getShortCanonicalName(java.util.Map.Entry.class.getCanonicalName())); + assertEquals("ClassUtils", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils")); + assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName("[Lorg.apache.commons.lang3.ClassUtils;")); + assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName("[[Lorg.apache.commons.lang3.ClassUtils;")); + assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils[]")); + assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtils[][]")); + assertEquals("int[]", ClassUtils.getShortCanonicalName("[I")); + assertEquals("int[]", ClassUtils.getShortCanonicalName(int[].class.getCanonicalName())); + assertEquals("int[]", ClassUtils.getShortCanonicalName(int[].class.getName())); + assertEquals("int[][]", ClassUtils.getShortCanonicalName("[[I")); + assertEquals("int[]", ClassUtils.getShortCanonicalName("int[]")); + assertEquals("int[][]", ClassUtils.getShortCanonicalName("int[][]")); + + // this is to demonstrate that the documentation and the naming of the methods + // uses the class name and canonical name totally mixed up, which cannot be + // fixed without backward compatibility break + assertEquals("int[]", int[].class.getCanonicalName()); + assertEquals("[I", int[].class.getName()); + + // Inner types... the problem is that these are not canonical names, classes with this name do not even have canonical + // name + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("ClassUtilsTest.6", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$6")); + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("ClassUtilsTest.5Named", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$5Named")); + assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortCanonicalName("org.apache.commons.lang3.ClassUtilsTest$Inner")); + // demonstrating what a canonical name is... it is a bigger issue to clean this up + assertEquals("org.apache.commons.lang3.ClassUtilsTest$10", new org.apache.commons.lang3.ClassUtilsTest() { + }.getClass().getName()); + assertNull(new org.apache.commons.lang3.ClassUtilsTest() { + }.getClass().getCanonicalName()); + } + + @Test + public void test_getShortClassName_Class() { + assertEquals("ClassUtils", ClassUtils.getShortClassName(ClassUtils.class)); + assertEquals("Map.Entry", ClassUtils.getShortClassName(Map.Entry.class)); + assertEquals("", ClassUtils.getShortClassName((Class<?>) null)); + + // LANG-535 + assertEquals("String[]", ClassUtils.getShortClassName(String[].class)); + assertEquals("Map.Entry[]", ClassUtils.getShortClassName(Map.Entry[].class)); + + // Primitives + assertEquals("boolean", ClassUtils.getShortClassName(boolean.class)); + assertEquals("byte", ClassUtils.getShortClassName(byte.class)); + assertEquals("char", ClassUtils.getShortClassName(char.class)); + assertEquals("short", ClassUtils.getShortClassName(short.class)); + assertEquals("int", ClassUtils.getShortClassName(int.class)); + assertEquals("long", ClassUtils.getShortClassName(long.class)); + assertEquals("float", ClassUtils.getShortClassName(float.class)); + assertEquals("double", ClassUtils.getShortClassName(double.class)); + + // Primitive Arrays + assertEquals("boolean[]", ClassUtils.getShortClassName(boolean[].class)); + assertEquals("byte[]", ClassUtils.getShortClassName(byte[].class)); + assertEquals("char[]", ClassUtils.getShortClassName(char[].class)); + assertEquals("short[]", ClassUtils.getShortClassName(short[].class)); + assertEquals("int[]", ClassUtils.getShortClassName(int[].class)); + assertEquals("long[]", ClassUtils.getShortClassName(long[].class)); + assertEquals("float[]", ClassUtils.getShortClassName(float[].class)); + assertEquals("double[]", ClassUtils.getShortClassName(double[].class)); + + // Arrays of arrays of ... + assertEquals("String[][]", ClassUtils.getShortClassName(String[][].class)); + assertEquals("String[][][]", ClassUtils.getShortClassName(String[][][].class)); + assertEquals("String[][][][]", ClassUtils.getShortClassName(String[][][][].class)); + + // Inner types + class Named { + // empty + } + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("ClassUtilsTest.12", ClassUtils.getShortClassName(new Object() { + // empty + }.getClass())); + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("ClassUtilsTest.10Named", ClassUtils.getShortClassName(Named.class)); + assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(Inner.class)); + } + + @Test + public void test_getShortClassName_Object() { + assertEquals("ClassUtils", ClassUtils.getShortClassName(new ClassUtils(), "<null>")); + assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(new Inner(), "<null>")); + assertEquals("String", ClassUtils.getShortClassName("hello", "<null>")); + assertEquals("<null>", ClassUtils.getShortClassName(null, "<null>")); + + // Inner types + class Named { + // empty + } + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("ClassUtilsTest.13", ClassUtils.getShortClassName(new Object() { + // empty + }, "<null>")); + // WARNING: this is fragile, implementation may change, naming is not guaranteed + assertEquals("ClassUtilsTest.11Named", ClassUtils.getShortClassName(new Named(), "<null>")); + assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(new Inner(), "<null>")); + } + + @Test + public void test_getShortClassName_String() { + assertEquals("ClassUtils", ClassUtils.getShortClassName(ClassUtils.class.getName())); + assertEquals("Map.Entry", ClassUtils.getShortClassName(Map.Entry.class.getName())); + assertEquals("", ClassUtils.getShortClassName((String) null)); + assertEquals("", ClassUtils.getShortClassName("")); + } + + @Test + public void test_getSimpleName_Class() { + assertEquals("ClassUtils", ClassUtils.getSimpleName(ClassUtils.class)); + assertEquals("Entry", ClassUtils.getSimpleName(Map.Entry.class)); + assertEquals("", ClassUtils.getSimpleName(null)); + + // LANG-535 + assertEquals("String[]", ClassUtils.getSimpleName(String[].class)); + assertEquals("Entry[]", ClassUtils.getSimpleName(Map.Entry[].class)); + + // Primitives + assertEquals("boolean", ClassUtils.getSimpleName(boolean.class)); + assertEquals("byte", ClassUtils.getSimpleName(byte.class)); + assertEquals("char", ClassUtils.getSimpleName(char.class)); + assertEquals("short", ClassUtils.getSimpleName(short.class)); + assertEquals("int", ClassUtils.getSimpleName(int.class)); + assertEquals("long", ClassUtils.getSimpleName(long.class)); + assertEquals("float", ClassUtils.getSimpleName(float.class)); + assertEquals("double", ClassUtils.getSimpleName(double.class)); + + // Primitive Arrays + assertEquals("boolean[]", ClassUtils.getSimpleName(boolean[].class)); + assertEquals("byte[]", ClassUtils.getSimpleName(byte[].class)); + assertEquals("char[]", ClassUtils.getSimpleName(char[].class)); + assertEquals("short[]", ClassUtils.getSimpleName(short[].class)); + assertEquals("int[]", ClassUtils.getSimpleName(int[].class)); + assertEquals("long[]", ClassUtils.getSimpleName(long[].class)); + assertEquals("float[]", ClassUtils.getSimpleName(float[].class)); + assertEquals("double[]", ClassUtils.getSimpleName(double[].class)); + + // Arrays of arrays of ... + assertEquals("String[][]", ClassUtils.getSimpleName(String[][].class)); + assertEquals("String[][][]", ClassUtils.getSimpleName(String[][][].class)); + assertEquals("String[][][][]", ClassUtils.getSimpleName(String[][][][].class)); + + // On-the-fly types + class Named { + // empty + } + assertEquals("", ClassUtils.getSimpleName(new Object() { + // empty + }.getClass())); + assertEquals("Named", ClassUtils.getSimpleName(Named.class)); + } + + @Test + public void test_getSimpleName_Object() { + assertEquals("ClassUtils", ClassUtils.getSimpleName(new ClassUtils())); + assertEquals("Inner", ClassUtils.getSimpleName(new Inner())); + assertEquals("String", ClassUtils.getSimpleName("hello")); + assertEquals(StringUtils.EMPTY, ClassUtils.getSimpleName(null)); + assertEquals(StringUtils.EMPTY, ClassUtils.getSimpleName(null)); + } + + @Test + public void test_getSimpleName_Object_String() { + assertEquals("ClassUtils", ClassUtils.getSimpleName(new ClassUtils(), "<null>")); + assertEquals("Inner", ClassUtils.getSimpleName(new Inner(), "<null>")); + assertEquals("String", ClassUtils.getSimpleName("hello", "<null>")); + assertEquals("<null>", ClassUtils.getSimpleName(null, "<null>")); + assertNull(ClassUtils.getSimpleName(null, null)); + } + + @Test + public void test_isAssignable() { + assertFalse(ClassUtils.isAssignable((Class<?>) null, null)); + assertFalse(ClassUtils.isAssignable(String.class, null)); + + assertTrue(ClassUtils.isAssignable(null, Object.class)); + assertTrue(ClassUtils.isAssignable(null, Integer.class)); + assertFalse(ClassUtils.isAssignable(null, Integer.TYPE)); + assertTrue(ClassUtils.isAssignable(String.class, Object.class)); + assertTrue(ClassUtils.isAssignable(String.class, String.class)); + assertFalse(ClassUtils.isAssignable(Object.class, String.class)); + + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.class)); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Object.class)); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE)); + assertTrue(ClassUtils.isAssignable(Integer.class, Object.class)); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE)); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.class)); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.class)); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Object.class)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Object.class)); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.class)); + } + + @Test + public void test_isAssignable_Autoboxing() { + assertFalse(ClassUtils.isAssignable((Class<?>) null, null, true)); + assertFalse(ClassUtils.isAssignable(String.class, null, true)); + + assertTrue(ClassUtils.isAssignable(null, Object.class, true)); + assertTrue(ClassUtils.isAssignable(null, Integer.class, true)); + assertFalse(ClassUtils.isAssignable(null, Integer.TYPE, true)); + assertTrue(ClassUtils.isAssignable(String.class, Object.class, true)); + assertTrue(ClassUtils.isAssignable(String.class, String.class, true)); + assertFalse(ClassUtils.isAssignable(Object.class, String.class, true)); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.class, true)); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Object.class, true)); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE, true)); + assertTrue(ClassUtils.isAssignable(Integer.class, Object.class, true)); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE, true)); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.class, true)); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.class, true)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE, true)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Object.class, true)); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE, true)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.class, true)); + } + + @Test + public void test_isAssignable_ClassArray_ClassArray() { + final Class<?>[] array2 = new Class[] {Object.class, Object.class}; + final Class<?>[] array1 = new Class[] {Object.class}; + final Class<?>[] array1s = new Class[] {String.class}; + final Class<?>[] array0 = new Class[] {}; + final Class<?>[] arrayPrimitives = {Integer.TYPE, Boolean.TYPE}; + final Class<?>[] arrayWrappers = {Integer.class, Boolean.class}; + + assertFalse(ClassUtils.isAssignable(array1, array2)); + assertFalse(ClassUtils.isAssignable(null, array2)); + assertTrue(ClassUtils.isAssignable(null, array0)); + assertTrue(ClassUtils.isAssignable(array0, array0)); + assertTrue(ClassUtils.isAssignable(array0, (Class<?>[]) null)); // explicit cast to avoid warning + assertTrue(ClassUtils.isAssignable(null, (Class<?>[]) null)); // explicit cast to avoid warning + + assertFalse(ClassUtils.isAssignable(array1, array1s)); + assertTrue(ClassUtils.isAssignable(array1s, array1s)); + assertTrue(ClassUtils.isAssignable(array1s, array1)); + + assertTrue(ClassUtils.isAssignable(arrayPrimitives, arrayWrappers)); + assertTrue(ClassUtils.isAssignable(arrayWrappers, arrayPrimitives)); + assertFalse(ClassUtils.isAssignable(arrayPrimitives, array1)); + assertFalse(ClassUtils.isAssignable(arrayWrappers, array1)); + assertTrue(ClassUtils.isAssignable(arrayPrimitives, array2)); + assertTrue(ClassUtils.isAssignable(arrayWrappers, array2)); + } + + @Test + public void test_isAssignable_ClassArray_ClassArray_Autoboxing() { + final Class<?>[] array2 = new Class[] {Object.class, Object.class}; + final Class<?>[] array1 = new Class[] {Object.class}; + final Class<?>[] array1s = new Class[] {String.class}; + final Class<?>[] array0 = new Class[] {}; + final Class<?>[] arrayPrimitives = {Integer.TYPE, Boolean.TYPE}; + final Class<?>[] arrayWrappers = {Integer.class, Boolean.class}; + + assertFalse(ClassUtils.isAssignable(array1, array2, true)); + assertFalse(ClassUtils.isAssignable(null, array2, true)); + assertTrue(ClassUtils.isAssignable(null, array0, true)); + assertTrue(ClassUtils.isAssignable(array0, array0, true)); + assertTrue(ClassUtils.isAssignable(array0, null, true)); + assertTrue(ClassUtils.isAssignable((Class[]) null, null, true)); + + assertFalse(ClassUtils.isAssignable(array1, array1s, true)); + assertTrue(ClassUtils.isAssignable(array1s, array1s, true)); + assertTrue(ClassUtils.isAssignable(array1s, array1, true)); + + assertTrue(ClassUtils.isAssignable(arrayPrimitives, arrayWrappers, true)); + assertTrue(ClassUtils.isAssignable(arrayWrappers, arrayPrimitives, true)); + assertFalse(ClassUtils.isAssignable(arrayPrimitives, array1, true)); + assertFalse(ClassUtils.isAssignable(arrayWrappers, array1, true)); + assertTrue(ClassUtils.isAssignable(arrayPrimitives, array2, true)); + assertTrue(ClassUtils.isAssignable(arrayWrappers, array2, true)); + } + + @Test + public void test_isAssignable_ClassArray_ClassArray_NoAutoboxing() { + final Class<?>[] array2 = new Class[] {Object.class, Object.class}; + final Class<?>[] array1 = new Class[] {Object.class}; + final Class<?>[] array1s = new Class[] {String.class}; + final Class<?>[] array0 = new Class[] {}; + final Class<?>[] arrayPrimitives = {Integer.TYPE, Boolean.TYPE}; + final Class<?>[] arrayWrappers = {Integer.class, Boolean.class}; + + assertFalse(ClassUtils.isAssignable(array1, array2, false)); + assertFalse(ClassUtils.isAssignable(null, array2, false)); + assertTrue(ClassUtils.isAssignable(null, array0, false)); + assertTrue(ClassUtils.isAssignable(array0, array0, false)); + assertTrue(ClassUtils.isAssignable(array0, null, false)); + assertTrue(ClassUtils.isAssignable((Class[]) null, null, false)); + + assertFalse(ClassUtils.isAssignable(array1, array1s, false)); + assertTrue(ClassUtils.isAssignable(array1s, array1s, false)); + assertTrue(ClassUtils.isAssignable(array1s, array1, false)); + + assertFalse(ClassUtils.isAssignable(arrayPrimitives, arrayWrappers, false)); + assertFalse(ClassUtils.isAssignable(arrayWrappers, arrayPrimitives, false)); + assertFalse(ClassUtils.isAssignable(arrayPrimitives, array1, false)); + assertFalse(ClassUtils.isAssignable(arrayWrappers, array1, false)); + assertTrue(ClassUtils.isAssignable(arrayWrappers, array2, false)); + assertFalse(ClassUtils.isAssignable(arrayPrimitives, array2, false)); + } + + @Test + public void test_isAssignable_DefaultUnboxing_Widening() { + // test byte conversions + assertFalse(ClassUtils.isAssignable(Byte.class, Character.TYPE), "byte -> char"); + assertTrue(ClassUtils.isAssignable(Byte.class, Byte.TYPE), "byte -> byte"); + assertTrue(ClassUtils.isAssignable(Byte.class, Short.TYPE), "byte -> short"); + assertTrue(ClassUtils.isAssignable(Byte.class, Integer.TYPE), "byte -> int"); + assertTrue(ClassUtils.isAssignable(Byte.class, Long.TYPE), "byte -> long"); + assertTrue(ClassUtils.isAssignable(Byte.class, Float.TYPE), "byte -> float"); + assertTrue(ClassUtils.isAssignable(Byte.class, Double.TYPE), "byte -> double"); + assertFalse(ClassUtils.isAssignable(Byte.class, Boolean.TYPE), "byte -> boolean"); + + // test short conversions + assertFalse(ClassUtils.isAssignable(Short.class, Character.TYPE), "short -> char"); + assertFalse(ClassUtils.isAssignable(Short.class, Byte.TYPE), "short -> byte"); + assertTrue(ClassUtils.isAssignable(Short.class, Short.TYPE), "short -> short"); + assertTrue(ClassUtils.isAssignable(Short.class, Integer.TYPE), "short -> int"); + assertTrue(ClassUtils.isAssignable(Short.class, Long.TYPE), "short -> long"); + assertTrue(ClassUtils.isAssignable(Short.class, Float.TYPE), "short -> float"); + assertTrue(ClassUtils.isAssignable(Short.class, Double.TYPE), "short -> double"); + assertFalse(ClassUtils.isAssignable(Short.class, Boolean.TYPE), "short -> boolean"); + + // test char conversions + assertTrue(ClassUtils.isAssignable(Character.class, Character.TYPE), "char -> char"); + assertFalse(ClassUtils.isAssignable(Character.class, Byte.TYPE), "char -> byte"); + assertFalse(ClassUtils.isAssignable(Character.class, Short.TYPE), "char -> short"); + assertTrue(ClassUtils.isAssignable(Character.class, Integer.TYPE), "char -> int"); + assertTrue(ClassUtils.isAssignable(Character.class, Long.TYPE), "char -> long"); + assertTrue(ClassUtils.isAssignable(Character.class, Float.TYPE), "char -> float"); + assertTrue(ClassUtils.isAssignable(Character.class, Double.TYPE), "char -> double"); + assertFalse(ClassUtils.isAssignable(Character.class, Boolean.TYPE), "char -> boolean"); + + // test int conversions + assertFalse(ClassUtils.isAssignable(Integer.class, Character.TYPE), "int -> char"); + assertFalse(ClassUtils.isAssignable(Integer.class, Byte.TYPE), "int -> byte"); + assertFalse(ClassUtils.isAssignable(Integer.class, Short.TYPE), "int -> short"); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE), "int -> int"); + assertTrue(ClassUtils.isAssignable(Integer.class, Long.TYPE), "int -> long"); + assertTrue(ClassUtils.isAssignable(Integer.class, Float.TYPE), "int -> float"); + assertTrue(ClassUtils.isAssignable(Integer.class, Double.TYPE), "int -> double"); + assertFalse(ClassUtils.isAssignable(Integer.class, Boolean.TYPE), "int -> boolean"); + + // test long conversions + assertFalse(ClassUtils.isAssignable(Long.class, Character.TYPE), "long -> char"); + assertFalse(ClassUtils.isAssignable(Long.class, Byte.TYPE), "long -> byte"); + assertFalse(ClassUtils.isAssignable(Long.class, Short.TYPE), "long -> short"); + assertFalse(ClassUtils.isAssignable(Long.class, Integer.TYPE), "long -> int"); + assertTrue(ClassUtils.isAssignable(Long.class, Long.TYPE), "long -> long"); + assertTrue(ClassUtils.isAssignable(Long.class, Float.TYPE), "long -> float"); + assertTrue(ClassUtils.isAssignable(Long.class, Double.TYPE), "long -> double"); + assertFalse(ClassUtils.isAssignable(Long.class, Boolean.TYPE), "long -> boolean"); + + // test float conversions + assertFalse(ClassUtils.isAssignable(Float.class, Character.TYPE), "float -> char"); + assertFalse(ClassUtils.isAssignable(Float.class, Byte.TYPE), "float -> byte"); + assertFalse(ClassUtils.isAssignable(Float.class, Short.TYPE), "float -> short"); + assertFalse(ClassUtils.isAssignable(Float.class, Integer.TYPE), "float -> int"); + assertFalse(ClassUtils.isAssignable(Float.class, Long.TYPE), "float -> long"); + assertTrue(ClassUtils.isAssignable(Float.class, Float.TYPE), "float -> float"); + assertTrue(ClassUtils.isAssignable(Float.class, Double.TYPE), "float -> double"); + assertFalse(ClassUtils.isAssignable(Float.class, Boolean.TYPE), "float -> boolean"); + + // test double conversions + assertFalse(ClassUtils.isAssignable(Double.class, Character.TYPE), "double -> char"); + assertFalse(ClassUtils.isAssignable(Double.class, Byte.TYPE), "double -> byte"); + assertFalse(ClassUtils.isAssignable(Double.class, Short.TYPE), "double -> short"); + assertFalse(ClassUtils.isAssignable(Double.class, Integer.TYPE), "double -> int"); + assertFalse(ClassUtils.isAssignable(Double.class, Long.TYPE), "double -> long"); + assertFalse(ClassUtils.isAssignable(Double.class, Float.TYPE), "double -> float"); + assertTrue(ClassUtils.isAssignable(Double.class, Double.TYPE), "double -> double"); + assertFalse(ClassUtils.isAssignable(Double.class, Boolean.TYPE), "double -> boolean"); + + // test boolean conversions + assertFalse(ClassUtils.isAssignable(Boolean.class, Character.TYPE), "boolean -> char"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Byte.TYPE), "boolean -> byte"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Short.TYPE), "boolean -> short"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Integer.TYPE), "boolean -> int"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Long.TYPE), "boolean -> long"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Float.TYPE), "boolean -> float"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Double.TYPE), "boolean -> double"); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE), "boolean -> boolean"); + } + + @Test + public void test_isAssignable_NoAutoboxing() { + assertFalse(ClassUtils.isAssignable((Class<?>) null, null, false)); + assertFalse(ClassUtils.isAssignable(String.class, null, false)); + + assertTrue(ClassUtils.isAssignable(null, Object.class, false)); + assertTrue(ClassUtils.isAssignable(null, Integer.class, false)); + assertFalse(ClassUtils.isAssignable(null, Integer.TYPE, false)); + assertTrue(ClassUtils.isAssignable(String.class, Object.class, false)); + assertTrue(ClassUtils.isAssignable(String.class, String.class, false)); + assertFalse(ClassUtils.isAssignable(Object.class, String.class, false)); + assertFalse(ClassUtils.isAssignable(Integer.TYPE, Integer.class, false)); + assertFalse(ClassUtils.isAssignable(Integer.TYPE, Object.class, false)); + assertFalse(ClassUtils.isAssignable(Integer.class, Integer.TYPE, false)); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE, false)); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.class, false)); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Boolean.class, false)); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Object.class, false)); + assertFalse(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE, false)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Object.class, false)); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE, false)); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.class, false)); + } + + @Test + public void test_isAssignable_Unboxing_Widening() { + // test byte conversions + assertFalse(ClassUtils.isAssignable(Byte.class, Character.TYPE, true), "byte -> char"); + assertTrue(ClassUtils.isAssignable(Byte.class, Byte.TYPE, true), "byte -> byte"); + assertTrue(ClassUtils.isAssignable(Byte.class, Short.TYPE, true), "byte -> short"); + assertTrue(ClassUtils.isAssignable(Byte.class, Integer.TYPE, true), "byte -> int"); + assertTrue(ClassUtils.isAssignable(Byte.class, Long.TYPE, true), "byte -> long"); + assertTrue(ClassUtils.isAssignable(Byte.class, Float.TYPE, true), "byte -> float"); + assertTrue(ClassUtils.isAssignable(Byte.class, Double.TYPE, true), "byte -> double"); + assertFalse(ClassUtils.isAssignable(Byte.class, Boolean.TYPE, true), "byte -> boolean"); + + // test short conversions + assertFalse(ClassUtils.isAssignable(Short.class, Character.TYPE, true), "short -> char"); + assertFalse(ClassUtils.isAssignable(Short.class, Byte.TYPE, true), "short -> byte"); + assertTrue(ClassUtils.isAssignable(Short.class, Short.TYPE, true), "short -> short"); + assertTrue(ClassUtils.isAssignable(Short.class, Integer.TYPE, true), "short -> int"); + assertTrue(ClassUtils.isAssignable(Short.class, Long.TYPE, true), "short -> long"); + assertTrue(ClassUtils.isAssignable(Short.class, Float.TYPE, true), "short -> float"); + assertTrue(ClassUtils.isAssignable(Short.class, Double.TYPE, true), "short -> double"); + assertFalse(ClassUtils.isAssignable(Short.class, Boolean.TYPE, true), "short -> boolean"); + + // test char conversions + assertTrue(ClassUtils.isAssignable(Character.class, Character.TYPE, true), "char -> char"); + assertFalse(ClassUtils.isAssignable(Character.class, Byte.TYPE, true), "char -> byte"); + assertFalse(ClassUtils.isAssignable(Character.class, Short.TYPE, true), "char -> short"); + assertTrue(ClassUtils.isAssignable(Character.class, Integer.TYPE, true), "char -> int"); + assertTrue(ClassUtils.isAssignable(Character.class, Long.TYPE, true), "char -> long"); + assertTrue(ClassUtils.isAssignable(Character.class, Float.TYPE, true), "char -> float"); + assertTrue(ClassUtils.isAssignable(Character.class, Double.TYPE, true), "char -> double"); + assertFalse(ClassUtils.isAssignable(Character.class, Boolean.TYPE, true), "char -> boolean"); + + // test int conversions + assertFalse(ClassUtils.isAssignable(Integer.class, Character.TYPE, true), "int -> char"); + assertFalse(ClassUtils.isAssignable(Integer.class, Byte.TYPE, true), "int -> byte"); + assertFalse(ClassUtils.isAssignable(Integer.class, Short.TYPE, true), "int -> short"); + assertTrue(ClassUtils.isAssignable(Integer.class, Integer.TYPE, true), "int -> int"); + assertTrue(ClassUtils.isAssignable(Integer.class, Long.TYPE, true), "int -> long"); + assertTrue(ClassUtils.isAssignable(Integer.class, Float.TYPE, true), "int -> float"); + assertTrue(ClassUtils.isAssignable(Integer.class, Double.TYPE, true), "int -> double"); + assertFalse(ClassUtils.isAssignable(Integer.class, Boolean.TYPE, true), "int -> boolean"); + + // test long conversions + assertFalse(ClassUtils.isAssignable(Long.class, Character.TYPE, true), "long -> char"); + assertFalse(ClassUtils.isAssignable(Long.class, Byte.TYPE, true), "long -> byte"); + assertFalse(ClassUtils.isAssignable(Long.class, Short.TYPE, true), "long -> short"); + assertFalse(ClassUtils.isAssignable(Long.class, Integer.TYPE, true), "long -> int"); + assertTrue(ClassUtils.isAssignable(Long.class, Long.TYPE, true), "long -> long"); + assertTrue(ClassUtils.isAssignable(Long.class, Float.TYPE, true), "long -> float"); + assertTrue(ClassUtils.isAssignable(Long.class, Double.TYPE, true), "long -> double"); + assertFalse(ClassUtils.isAssignable(Long.class, Boolean.TYPE, true), "long -> boolean"); + + // test float conversions + assertFalse(ClassUtils.isAssignable(Float.class, Character.TYPE, true), "float -> char"); + assertFalse(ClassUtils.isAssignable(Float.class, Byte.TYPE, true), "float -> byte"); + assertFalse(ClassUtils.isAssignable(Float.class, Short.TYPE, true), "float -> short"); + assertFalse(ClassUtils.isAssignable(Float.class, Integer.TYPE, true), "float -> int"); + assertFalse(ClassUtils.isAssignable(Float.class, Long.TYPE, true), "float -> long"); + assertTrue(ClassUtils.isAssignable(Float.class, Float.TYPE, true), "float -> float"); + assertTrue(ClassUtils.isAssignable(Float.class, Double.TYPE, true), "float -> double"); + assertFalse(ClassUtils.isAssignable(Float.class, Boolean.TYPE, true), "float -> boolean"); + + // test double conversions + assertFalse(ClassUtils.isAssignable(Double.class, Character.TYPE, true), "double -> char"); + assertFalse(ClassUtils.isAssignable(Double.class, Byte.TYPE, true), "double -> byte"); + assertFalse(ClassUtils.isAssignable(Double.class, Short.TYPE, true), "double -> short"); + assertFalse(ClassUtils.isAssignable(Double.class, Integer.TYPE, true), "double -> int"); + assertFalse(ClassUtils.isAssignable(Double.class, Long.TYPE, true), "double -> long"); + assertFalse(ClassUtils.isAssignable(Double.class, Float.TYPE, true), "double -> float"); + assertTrue(ClassUtils.isAssignable(Double.class, Double.TYPE, true), "double -> double"); + assertFalse(ClassUtils.isAssignable(Double.class, Boolean.TYPE, true), "double -> boolean"); + + // test boolean conversions + assertFalse(ClassUtils.isAssignable(Boolean.class, Character.TYPE, true), "boolean -> char"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Byte.TYPE, true), "boolean -> byte"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Short.TYPE, true), "boolean -> short"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Integer.TYPE, true), "boolean -> int"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Long.TYPE, true), "boolean -> long"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Float.TYPE, true), "boolean -> float"); + assertFalse(ClassUtils.isAssignable(Boolean.class, Double.TYPE, true), "boolean -> double"); + assertTrue(ClassUtils.isAssignable(Boolean.class, Boolean.TYPE, true), "boolean -> boolean"); + } + + @Test + public void test_isAssignable_Widening() { + // test byte conversions + assertFalse(ClassUtils.isAssignable(Byte.TYPE, Character.TYPE), "byte -> char"); + assertTrue(ClassUtils.isAssignable(Byte.TYPE, Byte.TYPE), "byte -> byte"); + assertTrue(ClassUtils.isAssignable(Byte.TYPE, Short.TYPE), "byte -> short"); + assertTrue(ClassUtils.isAssignable(Byte.TYPE, Integer.TYPE), "byte -> int"); + assertTrue(ClassUtils.isAssignable(Byte.TYPE, Long.TYPE), "byte -> long"); + assertTrue(ClassUtils.isAssignable(Byte.TYPE, Float.TYPE), "byte -> float"); + assertTrue(ClassUtils.isAssignable(Byte.TYPE, Double.TYPE), "byte -> double"); + assertFalse(ClassUtils.isAssignable(Byte.TYPE, Boolean.TYPE), "byte -> boolean"); + + // test short conversions + assertFalse(ClassUtils.isAssignable(Short.TYPE, Character.TYPE), "short -> char"); + assertFalse(ClassUtils.isAssignable(Short.TYPE, Byte.TYPE), "short -> byte"); + assertTrue(ClassUtils.isAssignable(Short.TYPE, Short.TYPE), "short -> short"); + assertTrue(ClassUtils.isAssignable(Short.TYPE, Integer.TYPE), "short -> int"); + assertTrue(ClassUtils.isAssignable(Short.TYPE, Long.TYPE), "short -> long"); + assertTrue(ClassUtils.isAssignable(Short.TYPE, Float.TYPE), "short -> float"); + assertTrue(ClassUtils.isAssignable(Short.TYPE, Double.TYPE), "short -> double"); + assertFalse(ClassUtils.isAssignable(Short.TYPE, Boolean.TYPE), "short -> boolean"); + + // test char conversions + assertTrue(ClassUtils.isAssignable(Character.TYPE, Character.TYPE), "char -> char"); + assertFalse(ClassUtils.isAssignable(Character.TYPE, Byte.TYPE), "char -> byte"); + assertFalse(ClassUtils.isAssignable(Character.TYPE, Short.TYPE), "char -> short"); + assertTrue(ClassUtils.isAssignable(Character.TYPE, Integer.TYPE), "char -> int"); + assertTrue(ClassUtils.isAssignable(Character.TYPE, Long.TYPE), "char -> long"); + assertTrue(ClassUtils.isAssignable(Character.TYPE, Float.TYPE), "char -> float"); + assertTrue(ClassUtils.isAssignable(Character.TYPE, Double.TYPE), "char -> double"); + assertFalse(ClassUtils.isAssignable(Character.TYPE, Boolean.TYPE), "char -> boolean"); + + // test int conversions + assertFalse(ClassUtils.isAssignable(Integer.TYPE, Character.TYPE), "int -> char"); + assertFalse(ClassUtils.isAssignable(Integer.TYPE, Byte.TYPE), "int -> byte"); + assertFalse(ClassUtils.isAssignable(Integer.TYPE, Short.TYPE), "int -> short"); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE), "int -> int"); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Long.TYPE), "int -> long"); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Float.TYPE), "int -> float"); + assertTrue(ClassUtils.isAssignable(Integer.TYPE, Double.TYPE), "int -> double"); + assertFalse(ClassUtils.isAssignable(Integer.TYPE, Boolean.TYPE), "int -> boolean"); + + // test long conversions + assertFalse(ClassUtils.isAssignable(Long.TYPE, Character.TYPE), "long -> char"); + assertFalse(ClassUtils.isAssignable(Long.TYPE, Byte.TYPE), "long -> byte"); + assertFalse(ClassUtils.isAssignable(Long.TYPE, Short.TYPE), "long -> short"); + assertFalse(ClassUtils.isAssignable(Long.TYPE, Integer.TYPE), "long -> int"); + assertTrue(ClassUtils.isAssignable(Long.TYPE, Long.TYPE), "long -> long"); + assertTrue(ClassUtils.isAssignable(Long.TYPE, Float.TYPE), "long -> float"); + assertTrue(ClassUtils.isAssignable(Long.TYPE, Double.TYPE), "long -> double"); + assertFalse(ClassUtils.isAssignable(Long.TYPE, Boolean.TYPE), "long -> boolean"); + + // test float conversions + assertFalse(ClassUtils.isAssignable(Float.TYPE, Character.TYPE), "float -> char"); + assertFalse(ClassUtils.isAssignable(Float.TYPE, Byte.TYPE), "float -> byte"); + assertFalse(ClassUtils.isAssignable(Float.TYPE, Short.TYPE), "float -> short"); + assertFalse(ClassUtils.isAssignable(Float.TYPE, Integer.TYPE), "float -> int"); + assertFalse(ClassUtils.isAssignable(Float.TYPE, Long.TYPE), "float -> long"); + assertTrue(ClassUtils.isAssignable(Float.TYPE, Float.TYPE), "float -> float"); + assertTrue(ClassUtils.isAssignable(Float.TYPE, Double.TYPE), "float -> double"); + assertFalse(ClassUtils.isAssignable(Float.TYPE, Boolean.TYPE), "float -> boolean"); + + // test double conversions + assertFalse(ClassUtils.isAssignable(Double.TYPE, Character.TYPE), "double -> char"); + assertFalse(ClassUtils.isAssignable(Double.TYPE, Byte.TYPE), "double -> byte"); + assertFalse(ClassUtils.isAssignable(Double.TYPE, Short.TYPE), "double -> short"); + assertFalse(ClassUtils.isAssignable(Double.TYPE, Integer.TYPE), "double -> int"); + assertFalse(ClassUtils.isAssignable(Double.TYPE, Long.TYPE), "double -> long"); + assertFalse(ClassUtils.isAssignable(Double.TYPE, Float.TYPE), "double -> float"); + assertTrue(ClassUtils.isAssignable(Double.TYPE, Double.TYPE), "double -> double"); + assertFalse(ClassUtils.isAssignable(Double.TYPE, Boolean.TYPE), "double -> boolean"); + + // test boolean conversions + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Character.TYPE), "boolean -> char"); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Byte.TYPE), "boolean -> byte"); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Short.TYPE), "boolean -> short"); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Integer.TYPE), "boolean -> int"); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Long.TYPE), "boolean -> long"); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Float.TYPE), "boolean -> float"); + assertFalse(ClassUtils.isAssignable(Boolean.TYPE, Double.TYPE), "boolean -> double"); + assertTrue(ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE), "boolean -> boolean"); + } + + @Test + public void test_isInnerClass_Class() { + assertTrue(ClassUtils.isInnerClass(Inner.class)); + assertTrue(ClassUtils.isInnerClass(Map.Entry.class)); + assertTrue(ClassUtils.isInnerClass(new Cloneable() { + // empty + }.getClass())); + assertFalse(ClassUtils.isInnerClass(this.getClass())); + assertFalse(ClassUtils.isInnerClass(String.class)); + assertFalse(ClassUtils.isInnerClass(null)); + } + + @Test + public void testComparable() { + final TreeMap<Class<?>, String> map = new TreeMap<>(ClassUtils.comparator()); + map.put(String.class, "lastEntry"); + map.toString(); + map.put(Character.class, "firstEntry"); + map.toString(); + assertEquals("firstEntry", map.firstEntry().getValue()); + assertEquals(Character.class, map.firstEntry().getKey()); + // + assertEquals("lastEntry", map.lastEntry().getValue()); + assertEquals(String.class, map.lastEntry().getKey()); + // + map.put(null, "null"); + map.toString(); + assertEquals("null", map.get(null)); + } + + @Test + public void testConstructor() { + assertNotNull(new ClassUtils()); + final Constructor<?>[] cons = ClassUtils.class.getDeclaredConstructors(); + assertEquals(1, cons.length); + assertTrue(Modifier.isPublic(cons[0].getModifiers())); + assertTrue(Modifier.isPublic(ClassUtils.class.getModifiers())); + assertFalse(Modifier.isFinal(ClassUtils.class.getModifiers())); + } + + @Test + public void testGetClassByNormalNameArrays() throws ClassNotFoundException { + assertEquals(int[].class, ClassUtils.getClass("int[]")); + assertEquals(long[].class, ClassUtils.getClass("long[]")); + assertEquals(short[].class, ClassUtils.getClass("short[]")); + assertEquals(byte[].class, ClassUtils.getClass("byte[]")); + assertEquals(char[].class, ClassUtils.getClass("char[]")); + assertEquals(float[].class, ClassUtils.getClass("float[]")); + assertEquals(double[].class, ClassUtils.getClass("double[]")); + assertEquals(boolean[].class, ClassUtils.getClass("boolean[]")); + assertEquals(String[].class, ClassUtils.getClass("java.lang.String[]")); + assertEquals(java.util.Map.Entry[].class, ClassUtils.getClass("java.util.Map.Entry[]")); + assertEquals(java.util.Map.Entry[].class, ClassUtils.getClass("java.util.Map$Entry[]")); + assertEquals(java.util.Map.Entry[].class, ClassUtils.getClass("[Ljava.util.Map.Entry;")); + assertEquals(java.util.Map.Entry[].class, ClassUtils.getClass("[Ljava.util.Map$Entry;")); + } + + @Test + public void testGetClassByNormalNameArrays2D() throws ClassNotFoundException { + assertEquals(int[][].class, ClassUtils.getClass("int[][]")); + assertEquals(long[][].class, ClassUtils.getClass("long[][]")); + assertEquals(short[][].class, ClassUtils.getClass("short[][]")); + assertEquals(byte[][].class, ClassUtils.getClass("byte[][]")); + assertEquals(char[][].class, ClassUtils.getClass("char[][]")); + assertEquals(float[][].class, ClassUtils.getClass("float[][]")); + assertEquals(double[][].class, ClassUtils.getClass("double[][]")); + assertEquals(boolean[][].class, ClassUtils.getClass("boolean[][]")); + assertEquals(String[][].class, ClassUtils.getClass("java.lang.String[][]")); + } + + @Test + public void testGetClassClassNotFound() throws Exception { + assertGetClassThrowsClassNotFound("bool"); + assertGetClassThrowsClassNotFound("bool[]"); + assertGetClassThrowsClassNotFound("integer[]"); + } + + @Test + public void testGetClassInvalidArguments() throws Exception { + assertGetClassThrowsNullPointerException(null); + assertGetClassThrowsClassNotFound("[][][]"); + assertGetClassThrowsClassNotFound("[[]"); + assertGetClassThrowsClassNotFound("["); + assertGetClassThrowsClassNotFound("java.lang.String]["); + assertGetClassThrowsClassNotFound(".hello.world"); + assertGetClassThrowsClassNotFound("hello..world"); + } + + @Test + public void testGetClassRawPrimitives() throws ClassNotFoundException { + assertEquals(int.class, ClassUtils.getClass("int")); + assertEquals(long.class, ClassUtils.getClass("long")); + assertEquals(short.class, ClassUtils.getClass("short")); + assertEquals(byte.class, ClassUtils.getClass("byte")); + assertEquals(char.class, ClassUtils.getClass("char")); + assertEquals(float.class, ClassUtils.getClass("float")); + assertEquals(double.class, ClassUtils.getClass("double")); + assertEquals(boolean.class, ClassUtils.getClass("boolean")); + assertEquals(void.class, ClassUtils.getClass("void")); + } + + @Test + public void testGetClassWithArrayClasses() throws Exception { + assertGetClassReturnsClass(String[].class); + assertGetClassReturnsClass(int[].class); + assertGetClassReturnsClass(long[].class); + assertGetClassReturnsClass(short[].class); + assertGetClassReturnsClass(byte[].class); + assertGetClassReturnsClass(char[].class); + assertGetClassReturnsClass(float[].class); + assertGetClassReturnsClass(double[].class); + assertGetClassReturnsClass(boolean[].class); + } + + @Test + public void testGetClassWithArrayClasses2D() throws Exception { + assertGetClassReturnsClass(String[][].class); + assertGetClassReturnsClass(int[][].class); + assertGetClassReturnsClass(long[][].class); + assertGetClassReturnsClass(short[][].class); + assertGetClassReturnsClass(byte[][].class); + assertGetClassReturnsClass(char[][].class); + assertGetClassReturnsClass(float[][].class); + assertGetClassReturnsClass(double[][].class); + assertGetClassReturnsClass(boolean[][].class); + } + + @Test + public void testGetComponentType() { + final CX[] newArray = {}; + @SuppressWarnings("unchecked") + final Class<CX[]> classCxArray = (Class<CX[]>) newArray.getClass(); + // No type-cast required. + final Class<CX> componentType = ClassUtils.getComponentType(classCxArray); + assertEquals(CX.class, componentType); + assertNull(ClassUtils.getComponentType(null)); + } + + @Test + public void testGetInnerClass() throws ClassNotFoundException { + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest.Inner.DeeplyNested")); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest.Inner$DeeplyNested")); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest$Inner$DeeplyNested")); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest$Inner.DeeplyNested")); + // + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest.Inner.DeeplyNested", true)); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest.Inner$DeeplyNested", true)); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest$Inner$DeeplyNested", true)); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass("org.apache.commons.lang3.ClassUtilsTest$Inner.DeeplyNested", true)); + // + final ClassLoader classLoader = Inner.DeeplyNested.class.getClassLoader(); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass(classLoader, "org.apache.commons.lang3.ClassUtilsTest.Inner.DeeplyNested")); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass(classLoader, "org.apache.commons.lang3.ClassUtilsTest.Inner$DeeplyNested")); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass(classLoader, "org.apache.commons.lang3.ClassUtilsTest$Inner$DeeplyNested")); + assertEquals(Inner.DeeplyNested.class, ClassUtils.getClass(classLoader, "org.apache.commons.lang3.ClassUtilsTest$Inner.DeeplyNested")); + // + } + + @Test + public void testGetPublicMethod() throws Exception { + // Tests with Collections$UnmodifiableSet + final Set<?> set = Collections.unmodifiableSet(new HashSet<>()); + final Method isEmptyMethod = ClassUtils.getPublicMethod(set.getClass(), "isEmpty"); + assertTrue(Modifier.isPublic(isEmptyMethod.getDeclaringClass().getModifiers())); + assertTrue((Boolean) isEmptyMethod.invoke(set)); + + // Tests with a public Class + final Method toStringMethod = ClassUtils.getPublicMethod(Object.class, "toString"); + assertEquals(Object.class.getMethod("toString"), toStringMethod); + } + + @Test + public void testHierarchyExcludingInterfaces() { + final Iterator<Class<?>> iter = ClassUtils.hierarchy(StringParameterizedChild.class).iterator(); + assertEquals(StringParameterizedChild.class, iter.next()); + assertEquals(GenericParent.class, iter.next()); + assertEquals(Object.class, iter.next()); + assertFalse(iter.hasNext()); + } + + @Test + public void testHierarchyIncludingInterfaces() { + final Iterator<Class<?>> iter = ClassUtils.hierarchy(StringParameterizedChild.class, Interfaces.INCLUDE).iterator(); + assertEquals(StringParameterizedChild.class, iter.next()); + assertEquals(GenericParent.class, iter.next()); + assertEquals(GenericConsumer.class, iter.next()); + assertEquals(Object.class, iter.next()); + assertFalse(iter.hasNext()); + } + + @Test + public void testIsPrimitiveOrWrapper() { + + // test primitive wrapper classes + assertTrue(ClassUtils.isPrimitiveOrWrapper(Boolean.class), "Boolean.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Byte.class), "Byte.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Character.class), "Character.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Short.class), "Short.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Integer.class), "Integer.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Long.class), "Long.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Double.class), "Double.class"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Float.class), "Float.class"); + + // test primitive classes + assertTrue(ClassUtils.isPrimitiveOrWrapper(Boolean.TYPE), "boolean"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Byte.TYPE), "byte"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Character.TYPE), "char"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Short.TYPE), "short"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Integer.TYPE), "int"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Long.TYPE), "long"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Double.TYPE), "double"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Float.TYPE), "float"); + assertTrue(ClassUtils.isPrimitiveOrWrapper(Void.TYPE), "Void.TYPE"); + + // others + assertFalse(ClassUtils.isPrimitiveOrWrapper(null), "null"); + assertFalse(ClassUtils.isPrimitiveOrWrapper(Void.class), "Void.class"); + assertFalse(ClassUtils.isPrimitiveOrWrapper(String.class), "String.class"); + assertFalse(ClassUtils.isPrimitiveOrWrapper(this.getClass()), "this.getClass()"); + } + + @Test + public void testIsPrimitiveWrapper() { + + // test primitive wrapper classes + assertTrue(ClassUtils.isPrimitiveWrapper(Boolean.class), "Boolean.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Byte.class), "Byte.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Character.class), "Character.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Short.class), "Short.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Integer.class), "Integer.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Long.class), "Long.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Double.class), "Double.class"); + assertTrue(ClassUtils.isPrimitiveWrapper(Float.class), "Float.class"); + + // test primitive classes + assertFalse(ClassUtils.isPrimitiveWrapper(Boolean.TYPE), "boolean"); + assertFalse(ClassUtils.isPrimitiveWrapper(Byte.TYPE), "byte"); + assertFalse(ClassUtils.isPrimitiveWrapper(Character.TYPE), "char"); + assertFalse(ClassUtils.isPrimitiveWrapper(Short.TYPE), "short"); + assertFalse(ClassUtils.isPrimitiveWrapper(Integer.TYPE), "int"); + assertFalse(ClassUtils.isPrimitiveWrapper(Long.TYPE), "long"); + assertFalse(ClassUtils.isPrimitiveWrapper(Double.TYPE), "double"); + assertFalse(ClassUtils.isPrimitiveWrapper(Float.TYPE), "float"); + + // others + assertFalse(ClassUtils.isPrimitiveWrapper(null), "null"); + assertFalse(ClassUtils.isPrimitiveWrapper(Void.class), "Void.class"); + assertFalse(ClassUtils.isPrimitiveWrapper(Void.TYPE), "Void.TYPE"); + assertFalse(ClassUtils.isPrimitiveWrapper(String.class), "String.class"); + assertFalse(ClassUtils.isPrimitiveWrapper(this.getClass()), "this.getClass()"); + } + + @Test + public void testPrimitivesToWrappers() { + // test null +// assertNull("null -> null", ClassUtils.primitivesToWrappers(null)); // generates warning + assertNull(ClassUtils.primitivesToWrappers((Class<?>[]) null), "null -> null"); // equivalent cast to avoid warning + // Other possible casts for null + assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.primitivesToWrappers(), "empty -> empty"); + final Class<?>[] castNull = ClassUtils.primitivesToWrappers((Class<?>) null); // == new Class<?>[]{null} + assertArrayEquals(new Class<?>[] {null}, castNull, "(Class<?>) null -> [null]"); + // test empty array is returned unchanged + assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.primitivesToWrappers(ArrayUtils.EMPTY_CLASS_ARRAY), "empty -> empty"); + + // test an array of various classes + final Class<?>[] primitives = new Class[] {Boolean.TYPE, Byte.TYPE, Character.TYPE, Short.TYPE, Integer.TYPE, Long.TYPE, Double.TYPE, Float.TYPE, + String.class, ClassUtils.class}; + final Class<?>[] wrappers = ClassUtils.primitivesToWrappers(primitives); + + for (int i = 0; i < primitives.length; i++) { + // test each returned wrapper + final Class<?> primitive = primitives[i]; + final Class<?> expectedWrapper = ClassUtils.primitiveToWrapper(primitive); + + assertEquals(expectedWrapper, wrappers[i], primitive + " -> " + expectedWrapper); + } + + // test an array of no primitive classes + final Class<?>[] noPrimitives = new Class[] {String.class, ClassUtils.class, Void.TYPE}; + // This used to return the exact same array, but no longer does. + assertNotSame(noPrimitives, ClassUtils.primitivesToWrappers(noPrimitives), "unmodified"); + } + + @Test + public void testPrimitiveToWrapper() { + + // test primitive classes + assertEquals(Boolean.class, ClassUtils.primitiveToWrapper(Boolean.TYPE), "boolean -> Boolean.class"); + assertEquals(Byte.class, ClassUtils.primitiveToWrapper(Byte.TYPE), "byte -> Byte.class"); + assertEquals(Character.class, ClassUtils.primitiveToWrapper(Character.TYPE), "char -> Character.class"); + assertEquals(Short.class, ClassUtils.primitiveToWrapper(Short.TYPE), "short -> Short.class"); + assertEquals(Integer.class, ClassUtils.primitiveToWrapper(Integer.TYPE), "int -> Integer.class"); + assertEquals(Long.class, ClassUtils.primitiveToWrapper(Long.TYPE), "long -> Long.class"); + assertEquals(Double.class, ClassUtils.primitiveToWrapper(Double.TYPE), "double -> Double.class"); + assertEquals(Float.class, ClassUtils.primitiveToWrapper(Float.TYPE), "float -> Float.class"); + + // test a few other classes + assertEquals(String.class, ClassUtils.primitiveToWrapper(String.class), "String.class -> String.class"); + assertEquals(ClassUtils.class, ClassUtils.primitiveToWrapper(ClassUtils.class), "ClassUtils.class -> ClassUtils.class"); + assertEquals(Void.TYPE, ClassUtils.primitiveToWrapper(Void.TYPE), "Void.TYPE -> Void.TYPE"); + + // test null + assertNull(ClassUtils.primitiveToWrapper(null), "null -> null"); + } + + // Show the Java bug: https://bugs.java.com/bugdatabase/view_bug.do?bug_id=4071957 + // We may have to delete this if a JDK fixes the bug. + @Test + public void testShowJavaBug() throws Exception { + // Tests with Collections$UnmodifiableSet + final Set<?> set = Collections.unmodifiableSet(new HashSet<>()); + final Method isEmptyMethod = set.getClass().getMethod("isEmpty"); + assertThrows(IllegalAccessException.class, () -> isEmptyMethod.invoke(set)); + } + + @Test + public void testToClass_object() { +// assertNull(ClassUtils.toClass(null)); // generates warning + assertNull(ClassUtils.toClass((Object[]) null)); // equivalent explicit cast + + // Additional varargs tests + assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.toClass(), "empty -> empty"); + final Class<?>[] castNull = ClassUtils.toClass((Object) null); // == new Object[]{null} + assertArrayEquals(new Object[] {null}, castNull, "(Object) null -> [null]"); + + assertSame(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.toClass(ArrayUtils.EMPTY_OBJECT_ARRAY)); + + assertArrayEquals(new Class[] {String.class, Integer.class, Double.class}, ClassUtils.toClass("Test", Integer.valueOf(1), Double.valueOf(99d))); + + assertArrayEquals(new Class[] {String.class, null, Double.class}, ClassUtils.toClass("Test", null, Double.valueOf(99d))); + } + + @Test + public void testWithInterleavingWhitespace() throws ClassNotFoundException { + assertEquals(int[].class, ClassUtils.getClass(" int [ ] ")); + assertEquals(long[].class, ClassUtils.getClass("\rlong\t[\n]\r")); + assertEquals(short[].class, ClassUtils.getClass("\tshort \t\t[]")); + assertEquals(byte[].class, ClassUtils.getClass("byte[\t\t\n\r] ")); + } + + @Test + public void testWrappersToPrimitives() { + // an array with classes to test + final Class<?>[] classes = {Boolean.class, Byte.class, Character.class, Short.class, Integer.class, Long.class, Float.class, Double.class, String.class, + ClassUtils.class, null}; + + final Class<?>[] primitives = ClassUtils.wrappersToPrimitives(classes); + // now test the result + assertEquals(classes.length, primitives.length, "Wrong length of result array"); + for (int i = 0; i < classes.length; i++) { + final Class<?> expectedPrimitive = ClassUtils.wrapperToPrimitive(classes[i]); + assertEquals(expectedPrimitive, primitives[i], classes[i] + " -> " + expectedPrimitive); + } + } + + @Test + public void testWrappersToPrimitivesEmpty() { + final Class<?>[] empty = new Class[0]; + assertArrayEquals(empty, ClassUtils.wrappersToPrimitives(empty), "Wrong result for empty input"); + } + + @Test + public void testWrappersToPrimitivesNull() { +// assertNull("Wrong result for null input", ClassUtils.wrappersToPrimitives(null)); // generates warning + assertNull(ClassUtils.wrappersToPrimitives((Class<?>[]) null), "Wrong result for null input"); // equivalent cast + // Other possible casts for null + assertArrayEquals(ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.wrappersToPrimitives(), "empty -> empty"); + final Class<?>[] castNull = ClassUtils.wrappersToPrimitives((Class<?>) null); // == new Class<?>[]{null} + assertArrayEquals(new Class<?>[] {null}, castNull, "(Class<?>) null -> [null]"); + } + + @Test + public void testWrapperToPrimitive() { + // an array with classes to convert + final Class<?>[] primitives = {Boolean.TYPE, Byte.TYPE, Character.TYPE, Short.TYPE, Integer.TYPE, Long.TYPE, Float.TYPE, Double.TYPE}; + for (final Class<?> primitive : primitives) { + final Class<?> wrapperCls = ClassUtils.primitiveToWrapper(primitive); + assertFalse(wrapperCls.isPrimitive(), "Still primitive"); + assertEquals(primitive, ClassUtils.wrapperToPrimitive(wrapperCls), wrapperCls + " -> " + primitive); + } + } + + @Test + public void testWrapperToPrimitiveNoWrapper() { + assertNull(ClassUtils.wrapperToPrimitive(String.class), "Wrong result for non wrapper class"); + } + + @Test + public void testWrapperToPrimitiveNull() { + assertNull(ClassUtils.wrapperToPrimitive(null), "Wrong result for null class"); + } +} |