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Diffstat (limited to 'src/test/java/org/apache/commons/lang3/CharSequenceUtilsTest.java')
| -rw-r--r-- | src/test/java/org/apache/commons/lang3/CharSequenceUtilsTest.java | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/CharSequenceUtilsTest.java b/src/test/java/org/apache/commons/lang3/CharSequenceUtilsTest.java new file mode 100644 index 000000000..7d095d3dd --- /dev/null +++ b/src/test/java/org/apache/commons/lang3/CharSequenceUtilsTest.java @@ -0,0 +1,311 @@ +/* + * 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.assertNull; +import static org.junit.jupiter.api.Assertions.assertThrows; +import static org.junit.jupiter.api.Assertions.assertTrue; +import static org.junit.jupiter.params.provider.Arguments.arguments; + +import java.lang.reflect.Constructor; +import java.lang.reflect.Modifier; +import java.util.Random; +import java.util.stream.IntStream; +import java.util.stream.Stream; + +import org.junit.jupiter.api.Test; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.MethodSource; + +/** + * Tests CharSequenceUtils + */ +public class CharSequenceUtilsTest extends AbstractLangTest { + + @Test + public void testConstructor() { + assertNotNull(new CharSequenceUtils()); + final Constructor<?>[] cons = CharSequenceUtils.class.getDeclaredConstructors(); + assertEquals(1, cons.length); + assertTrue(Modifier.isPublic(cons[0].getModifiers())); + assertTrue(Modifier.isPublic(CharSequenceUtils.class.getModifiers())); + assertFalse(Modifier.isFinal(CharSequenceUtils.class.getModifiers())); + } + + @Test + public void testSubSequence() { + // + // null input + // + assertNull(CharSequenceUtils.subSequence(null, -1)); + assertNull(CharSequenceUtils.subSequence(null, 0)); + assertNull(CharSequenceUtils.subSequence(null, 1)); + // + // non-null input + // + assertEquals(StringUtils.EMPTY, CharSequenceUtils.subSequence(StringUtils.EMPTY, 0)); + assertEquals("012", CharSequenceUtils.subSequence("012", 0)); + assertEquals("12", CharSequenceUtils.subSequence("012", 1)); + assertEquals("2", CharSequenceUtils.subSequence("012", 2)); + assertEquals(StringUtils.EMPTY, CharSequenceUtils.subSequence("012", 3)); + } + + @Test + public void testSubSequenceNegativeStart() { + assertThrows(IndexOutOfBoundsException.class, () -> CharSequenceUtils.subSequence(StringUtils.EMPTY, -1)); + } + + @Test + public void testSubSequenceTooLong() { + assertThrows(IndexOutOfBoundsException.class, () -> CharSequenceUtils.subSequence(StringUtils.EMPTY, 1)); + } + + static class TestData{ + final String source; + final boolean ignoreCase; + final int toffset; + final String other; + final int ooffset; + final int len; + final boolean expected; + final Class<? extends Throwable> throwable; + TestData(final String source, final boolean ignoreCase, final int toffset, + final String other, final int ooffset, final int len, final boolean expected) { + this.source = source; + this.ignoreCase = ignoreCase; + this.toffset = toffset; + this.other = other; + this.ooffset = ooffset; + this.len = len; + this.expected = expected; + this.throwable = null; + } + TestData(final String source, final boolean ignoreCase, final int toffset, + final String other, final int ooffset, final int len, final Class<? extends Throwable> throwable) { + this.source = source; + this.ignoreCase = ignoreCase; + this.toffset = toffset; + this.other = other; + this.ooffset = ooffset; + this.len = len; + this.expected = false; + this.throwable = throwable; + } + @Override + public String toString() { + final StringBuilder sb = new StringBuilder(); + sb.append(source).append("[").append(toffset).append("]"); + sb.append(ignoreCase? " caseblind ":" samecase "); + sb.append(other).append("[").append(ooffset).append("]"); + sb.append(" ").append(len).append(" => "); + if (throwable != null) { + sb.append(throwable); + } else { + sb.append(expected); + } + return sb.toString(); + } + } + + private static final TestData[] TEST_DATA = { + // Source IgnoreCase Offset Other Offset Length Result + new TestData("", true, -1, "", -1, -1, false), + new TestData("", true, 0, "", 0, 1, false), + new TestData("a", true, 0, "abc", 0, 0, true), + new TestData("a", true, 0, "abc", 0, 1, true), + new TestData("a", true, 0, null, 0, 0, NullPointerException.class), + new TestData(null, true, 0, null, 0, 0, NullPointerException.class), + new TestData(null, true, 0, "", 0, 0, NullPointerException.class), + new TestData("Abc", true, 0, "abc", 0, 3, true), + new TestData("Abc", false, 0, "abc", 0, 3, false), + new TestData("Abc", true, 1, "abc", 1, 2, true), + new TestData("Abc", false, 1, "abc", 1, 2, true), + new TestData("Abcd", true, 1, "abcD", 1, 2, true), + new TestData("Abcd", false, 1, "abcD", 1, 2, true), + }; + + private abstract static class RunTest { + + abstract boolean invoke(); + + void run(final TestData data, final String id) { + if (data.throwable != null) { + assertThrows(data.throwable, this::invoke, id + " Expected " + data.throwable); + } else { + final boolean stringCheck = invoke(); + assertEquals(data.expected, stringCheck, id + " Failed test " + data); + } + } + + } + + @Test + public void testRegionMatches() { + for (final TestData data : TEST_DATA) { + new RunTest() { + @Override + boolean invoke() { + return data.source.regionMatches(data.ignoreCase, data.toffset, data.other, data.ooffset, data.len); + } + }.run(data, "String"); + new RunTest() { + @Override + boolean invoke() { + return CharSequenceUtils.regionMatches(data.source, data.ignoreCase, data.toffset, data.other, data.ooffset, data.len); + } + }.run(data, "CSString"); + new RunTest() { + @Override + boolean invoke() { + return CharSequenceUtils.regionMatches(new StringBuilder(data.source), data.ignoreCase, data.toffset, data.other, data.ooffset, data.len); + } + }.run(data, "CSNonString"); + } + } + + + @Test + public void testToCharArray() { + final StringBuilder builder = new StringBuilder("abcdefg"); + final char[] expected = builder.toString().toCharArray(); + assertArrayEquals(expected, CharSequenceUtils.toCharArray(builder)); + assertArrayEquals(expected, CharSequenceUtils.toCharArray(builder.toString())); + assertArrayEquals(ArrayUtils.EMPTY_CHAR_ARRAY, CharSequenceUtils.toCharArray(null)); + } + + static class WrapperString implements CharSequence { + private final CharSequence inner; + + WrapperString(final CharSequence inner) { + this.inner = inner; + } + + @Override + public int length() { + return inner.length(); + } + + @Override + public char charAt(final int index) { + return inner.charAt(index); + } + + @Override + public CharSequence subSequence(final int start, final int end) { + return inner.subSequence(start, end); + } + + @Override + public String toString() { + return inner.toString(); + } + + @Override + public IntStream chars() { + return inner.chars(); + } + + @Override + public IntStream codePoints() { + return inner.codePoints(); + } + } + + @Test + public void testNewLastIndexOf() { + testNewLastIndexOfSingle("808087847-1321060740-635567660180086727-925755305", "-1321060740-635567660", 21); + testNewLastIndexOfSingle("", ""); + testNewLastIndexOfSingle("1", ""); + testNewLastIndexOfSingle("", "1"); + testNewLastIndexOfSingle("1", "1"); + testNewLastIndexOfSingle("11", "1"); + testNewLastIndexOfSingle("1", "11"); + + testNewLastIndexOfSingle("apache", "a"); + testNewLastIndexOfSingle("apache", "p"); + testNewLastIndexOfSingle("apache", "e"); + testNewLastIndexOfSingle("apache", "x"); + testNewLastIndexOfSingle("oraoraoraora", "r"); + testNewLastIndexOfSingle("mudamudamudamuda", "d"); + // There is a route through checkLaterThan1#checkLaterThan1 + // which only gets touched if there is a two letter (or more) partial match + // (in this case "st") earlier in the searched string. + testNewLastIndexOfSingle("junk-ststarting", "starting"); + + final Random random = new Random(); + final StringBuilder seg = new StringBuilder(); + while (seg.length() <= CharSequenceUtils.TO_STRING_LIMIT) { + seg.append(random.nextInt()); + } + StringBuilder original = new StringBuilder(seg); + testNewLastIndexOfSingle(original, seg); + for (int i = 0; i < 100; i++) { + if (random.nextDouble() < 0.5) { + original.append(random.nextInt() % 10); + } else { + original = new StringBuilder().append(String.valueOf(random.nextInt() % 100)).append(original); + } + testNewLastIndexOfSingle(original, seg); + } + } + + @ParameterizedTest + @MethodSource("lastIndexWithStandardCharSequence") + public void testLastIndexOfWithDifferentCharSequences(final CharSequence cs, final CharSequence search, final int start, + final int expected) { + assertEquals(expected, CharSequenceUtils.lastIndexOf(cs, search, start)); + } + + static Stream<Arguments> lastIndexWithStandardCharSequence() { + return Stream.of( + arguments("abc", "b", 2, 1), + arguments(new StringBuilder("abc"), "b", 2, 1), + arguments(new StringBuffer("abc"), "b", 2, 1), + arguments("abc", new StringBuilder("b"), 2, 1), + arguments(new StringBuilder("abc"), new StringBuilder("b"), 2, 1), + arguments(new StringBuffer("abc"), new StringBuffer("b"), 2, 1), + arguments(new StringBuilder("abc"), new StringBuffer("b"), 2, 1) + ); + } + + private void testNewLastIndexOfSingle(final CharSequence a, final CharSequence b) { + final int maxa = Math.max(a.length(), b.length()); + for (int i = -maxa - 10; i <= maxa + 10; i++) { + testNewLastIndexOfSingle(a, b, i); + } + testNewLastIndexOfSingle(a, b, Integer.MIN_VALUE); + testNewLastIndexOfSingle(a, b, Integer.MAX_VALUE); + } + + private void testNewLastIndexOfSingle(final CharSequence a, final CharSequence b, final int start) { + testNewLastIndexOfSingleSingle(a, b, start); + testNewLastIndexOfSingleSingle(b, a, start); + } + + private void testNewLastIndexOfSingleSingle(final CharSequence a, final CharSequence b, final int start) { + assertEquals( + a.toString().lastIndexOf(b.toString(), start), + CharSequenceUtils.lastIndexOf(new WrapperString(a.toString()), new WrapperString(b.toString()), start), + "testNewLastIndexOf fails! original : " + a + " seg : " + b + " start : " + start + ); + } +} |