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package com.fasterxml.jackson.databind.util;
import java.util.*;
import com.fasterxml.jackson.databind.BaseMapTest;
import com.fasterxml.jackson.databind.util.ClassUtil;
public class TestClassUtil
extends BaseMapTest
{
/*
/**********************************************************
/* Test classes, enums
/**********************************************************
*/
/* Test classes and interfaces needed for testing class util
* methods
*/
static abstract class BaseClass implements Comparable<BaseClass>,
BaseInt
{
BaseClass(String str) { }
}
interface BaseInt { }
interface SubInt extends BaseInt { }
enum TestEnum { A; }
abstract class InnerNonStatic { }
static class Inner {
protected Inner() {
throw new IllegalStateException("test");
}
}
static abstract class SubClass
extends BaseClass
implements SubInt {
SubClass() { super("x"); }
}
static abstract class ConcreteAndAbstract {
public abstract void a();
public void c() { }
}
/*
/**********************************************************
/* Test methods
/**********************************************************
*/
public void testIsConcrete() throws Exception
{
assertTrue(ClassUtil.isConcrete(getClass()));
assertFalse(ClassUtil.isConcrete(BaseClass.class));
assertFalse(ClassUtil.isConcrete(BaseInt.class));
assertFalse(ClassUtil.isConcrete(ConcreteAndAbstract.class.getDeclaredMethod("a")));
assertTrue(ClassUtil.isConcrete(ConcreteAndAbstract.class.getDeclaredMethod("c")));
}
public void testCanBeABeanType()
{
assertEquals("annotation", ClassUtil.canBeABeanType(java.lang.annotation.Retention.class));
assertEquals("array", ClassUtil.canBeABeanType(String[].class));
assertEquals("enum", ClassUtil.canBeABeanType(TestEnum.class));
assertEquals("primitive", ClassUtil.canBeABeanType(Integer.TYPE));
assertNull(ClassUtil.canBeABeanType(Integer.class));
assertEquals("non-static member class", ClassUtil.isLocalType(InnerNonStatic.class, false));
assertNull(ClassUtil.isLocalType(Integer.class, false));
}
public void testExceptionHelpers()
{
RuntimeException e = new RuntimeException("test");
RuntimeException wrapper = new RuntimeException(e);
assertSame(e, ClassUtil.getRootCause(wrapper));
try {
ClassUtil.throwAsIAE(e);
fail("Shouldn't get this far");
} catch (RuntimeException e2) {
assertSame(e, e2);
}
try {
ClassUtil.throwRootCause(e);
fail("Shouldn't get this far");
} catch (Exception eAct) {
assertSame(e, eAct);
}
Error err = new Error();
try {
ClassUtil.throwAsIAE(err);
fail("Shouldn't get this far");
} catch (Error errAct) {
assertSame(err, errAct);
}
try {
ClassUtil.unwrapAndThrowAsIAE(wrapper);
fail("Shouldn't get this far");
} catch (RuntimeException e2) {
assertSame(e, e2);
}
}
public void testFailedCreateInstance()
{
try {
ClassUtil.createInstance(BaseClass.class, true);
} catch (IllegalArgumentException e) {
verifyException(e, "has no default");
}
try {
// false means ctor would need to be public
ClassUtil.createInstance(Inner.class, false);
} catch (IllegalArgumentException e) {
verifyException(e, "is not accessible");
}
// and finally, check that we'll get expected exception...
try {
ClassUtil.createInstance(Inner.class, true);
} catch (IllegalStateException e) {
verifyException(e, "test");
}
}
public void testPrimiteDefaultValue()
{
assertEquals(Integer.valueOf(0), ClassUtil.defaultValue(Integer.TYPE));
assertEquals(Long.valueOf(0L), ClassUtil.defaultValue(Long.TYPE));
assertEquals(Character.valueOf('\0'), ClassUtil.defaultValue(Character.TYPE));
assertEquals(Short.valueOf((short) 0), ClassUtil.defaultValue(Short.TYPE));
assertEquals(Byte.valueOf((byte) 0), ClassUtil.defaultValue(Byte.TYPE));
assertEquals(Double.valueOf(0.0), ClassUtil.defaultValue(Double.TYPE));
assertEquals(Float.valueOf(0.0f), ClassUtil.defaultValue(Float.TYPE));
try {
ClassUtil.defaultValue(String.class);
} catch (IllegalArgumentException e) {
verifyException(e, "String is not a primitive type");
}
}
public void testPrimiteWrapperType()
{
assertEquals(Integer.class, ClassUtil.wrapperType(Integer.TYPE));
assertEquals(Long.class, ClassUtil.wrapperType(Long.TYPE));
assertEquals(Character.class, ClassUtil.wrapperType(Character.TYPE));
assertEquals(Short.class, ClassUtil.wrapperType(Short.TYPE));
assertEquals(Byte.class, ClassUtil.wrapperType(Byte.TYPE));
assertEquals(Double.class, ClassUtil.wrapperType(Double.TYPE));
assertEquals(Float.class, ClassUtil.wrapperType(Float.TYPE));
try {
ClassUtil.wrapperType(String.class);
} catch (IllegalArgumentException e) {
verifyException(e, "String is not a primitive type");
}
}
public void testFindEnumType()
{
assertEquals(TestEnum.class, ClassUtil.findEnumType(TestEnum.A));
assertEquals(TestEnum.class, ClassUtil.findEnumType(EnumSet.allOf(TestEnum.class)));
assertEquals(TestEnum.class, ClassUtil.findEnumType(new EnumMap<TestEnum,Integer>(TestEnum.class)));
}
public void testDescs()
{
final String exp = String.class.getName();
assertEquals(exp, ClassUtil.getClassDescription("foo"));
assertEquals(exp, ClassUtil.getClassDescription(String.class));
}
}
|
