/* * 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.lang; 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.List; import java.util.Map; import java.util.Set; import junit.framework.Test; import junit.framework.TestCase; import junit.framework.TestSuite; import junit.textui.TestRunner; /** * Unit tests {@link org.apache.commons.lang.ClassUtils}. * * @author Stephen Colebourne * @author Gary D. Gregory * @author Tomasz Blachowicz * @version $Id: ClassUtilsTest.java 612749 2008-01-17 08:05:23Z bayard $ */ public class ClassUtilsTest extends TestCase { public ClassUtilsTest(String name) { super(name); } public static void main(String[] args) { TestRunner.run(suite()); } public static Test suite() { TestSuite suite = new TestSuite(ClassUtilsTest.class); suite.setName("ClassUtils Tests"); return suite; } protected void setUp() throws Exception { super.setUp(); } protected void tearDown() throws Exception { super.tearDown(); } private static class Inner { } //----------------------------------------------------------------------- public void testConstructor() { assertNotNull(new ClassUtils()); Constructor[] cons = ClassUtils.class.getDeclaredConstructors(); assertEquals(1, cons.length); assertEquals(true, Modifier.isPublic(cons[0].getModifiers())); assertEquals(true, Modifier.isPublic(ClassUtils.class.getModifiers())); assertEquals(false, Modifier.isFinal(ClassUtils.class.getModifiers())); } // ------------------------------------------------------------------------- public void test_getShortClassName_Object() { assertEquals("ClassUtils", ClassUtils.getShortClassName(new ClassUtils(), "")); assertEquals("ClassUtilsTest.Inner", ClassUtils.getShortClassName(new Inner(), "")); assertEquals("String", ClassUtils.getShortClassName("hello", "")); assertEquals("", ClassUtils.getShortClassName(null, "")); } public void test_getShortClassName_Class() { assertEquals("ClassUtils", ClassUtils.getShortClassName(ClassUtils.class)); assertEquals("Map.Entry", ClassUtils.getShortClassName(Map.Entry.class)); assertEquals("", ClassUtils.getShortClassName((Class) null)); } 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("")); } // ------------------------------------------------------------------------- public void test_getPackageName_Object() { assertEquals("org.apache.commons.lang", ClassUtils.getPackageName(new ClassUtils(), "")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageName(new Inner(), "")); assertEquals("", ClassUtils.getPackageName(null, "")); } 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)); } public void test_getPackageName_String() { assertEquals("org.apache.commons.lang", ClassUtils.getPackageName(ClassUtils.class.getName())); assertEquals("java.util", ClassUtils.getPackageName(Map.Entry.class.getName())); assertEquals("", ClassUtils.getPackageName((String)null)); assertEquals("", ClassUtils.getPackageName("")); } // ------------------------------------------------------------------------- public void test_getAllSuperclasses_Class() { List list = ClassUtils.getAllSuperclasses(CY.class); assertEquals(2, list.size()); assertEquals(CX.class, list.get(0)); assertEquals(Object.class, list.get(1)); assertEquals(null, ClassUtils.getAllSuperclasses(null)); } public void test_getAllInterfaces_Class() { 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)); assertEquals(null, ClassUtils.getAllInterfaces(null)); } private static interface IA { } private static interface IB { } private static interface IC extends ID, IE { } private static interface ID { } private static interface IE extends IF { } private static interface IF { } private static class CX implements IB, IA, IE { } private static class CY extends CX implements IB, IC { } // ------------------------------------------------------------------------- public void test_convertClassNamesToClasses_List() { List list = new ArrayList(); List result = ClassUtils.convertClassNamesToClasses(list); assertEquals(0, result.size()); list.add("java.lang.String"); list.add("java.lang.xxx"); list.add("java.lang.Object"); result = ClassUtils.convertClassNamesToClasses(list); assertEquals(3, result.size()); assertEquals(String.class, result.get(0)); assertEquals(null, result.get(1)); assertEquals(Object.class, result.get(2)); list.add(new Object()); try { ClassUtils.convertClassNamesToClasses(list); fail(); } catch (ClassCastException ex) {} assertEquals(null, ClassUtils.convertClassNamesToClasses(null)); } public void test_convertClassesToClassNames_List() { List list = new ArrayList(); List 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)); assertEquals(null, result.get(1)); assertEquals("java.lang.Object", result.get(2)); list.add(new Object()); try { ClassUtils.convertClassesToClassNames(list); fail(); } catch (ClassCastException ex) {} assertEquals(null, ClassUtils.convertClassesToClassNames(null)); } // ------------------------------------------------------------------------- public void test_isInnerClass_Class() { assertEquals(true, ClassUtils.isInnerClass(Inner.class)); assertEquals(true, ClassUtils.isInnerClass(Map.Entry.class)); assertEquals(true, ClassUtils.isInnerClass(new Cloneable() { }.getClass())); assertEquals(false, ClassUtils.isInnerClass(this.getClass())); assertEquals(false, ClassUtils.isInnerClass(String.class)); assertEquals(false, ClassUtils.isInnerClass(null)); } // ------------------------------------------------------------------------- public void test_isAssignable_ClassArray_ClassArray() throws Exception { Class[] array2 = new Class[] {Object.class, Object.class}; Class[] array1 = new Class[] {Object.class}; Class[] array1s = new Class[] {String.class}; Class[] array0 = new Class[] {}; assertEquals(false, ClassUtils.isAssignable(array1, array2)); assertEquals(false, ClassUtils.isAssignable(null, array2)); assertEquals(true, ClassUtils.isAssignable(null, array0)); assertEquals(true, ClassUtils.isAssignable(array0, array0)); assertEquals(true, ClassUtils.isAssignable(array0, null)); assertEquals(true, ClassUtils.isAssignable((Class[]) null, (Class[]) null)); assertEquals(false, ClassUtils.isAssignable(array1, array1s)); assertEquals(true, ClassUtils.isAssignable(array1s, array1s)); assertEquals(true, ClassUtils.isAssignable(array1s, array1)); } public void test_isAssignable() throws Exception { assertEquals(false, ClassUtils.isAssignable((Class) null, null)); assertEquals(false, ClassUtils.isAssignable(String.class, null)); assertEquals(true, ClassUtils.isAssignable(null, Object.class)); assertEquals(true, ClassUtils.isAssignable(null, Integer.class)); assertEquals(false, ClassUtils.isAssignable(null, Integer.TYPE)); assertEquals(true, ClassUtils.isAssignable(String.class, Object.class)); assertEquals(true, ClassUtils.isAssignable(String.class, String.class)); assertEquals(false, ClassUtils.isAssignable(Object.class, String.class)); assertEquals(false, ClassUtils.isAssignable(Integer.TYPE, Integer.class)); assertEquals(false, ClassUtils.isAssignable(Integer.class, Integer.TYPE)); assertEquals(true, ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE)); assertEquals(true, ClassUtils.isAssignable(Integer.class, Integer.class)); } public void test_isAssignable_Widening() throws Exception { // test byte conversions assertEquals("byte -> char", false, ClassUtils.isAssignable(Byte.TYPE, Character.TYPE)); assertEquals("byte -> byte", true, ClassUtils.isAssignable(Byte.TYPE, Byte.TYPE)); assertEquals("byte -> short", true, ClassUtils.isAssignable(Byte.TYPE, Short.TYPE)); assertEquals("byte -> int", true, ClassUtils.isAssignable(Byte.TYPE, Integer.TYPE)); assertEquals("byte -> long", true, ClassUtils.isAssignable(Byte.TYPE, Long.TYPE)); assertEquals("byte -> float", true, ClassUtils.isAssignable(Byte.TYPE, Float.TYPE)); assertEquals("byte -> double", true, ClassUtils.isAssignable(Byte.TYPE, Double.TYPE)); assertEquals("byte -> boolean", false, ClassUtils.isAssignable(Byte.TYPE, Boolean.TYPE)); // test short conversions assertEquals("short -> char", false, ClassUtils.isAssignable(Short.TYPE, Character.TYPE)); assertEquals("short -> byte", false, ClassUtils.isAssignable(Short.TYPE, Byte.TYPE)); assertEquals("short -> short", true, ClassUtils.isAssignable(Short.TYPE, Short.TYPE)); assertEquals("short -> int", true, ClassUtils.isAssignable(Short.TYPE, Integer.TYPE)); assertEquals("short -> long", true, ClassUtils.isAssignable(Short.TYPE, Long.TYPE)); assertEquals("short -> float", true, ClassUtils.isAssignable(Short.TYPE, Float.TYPE)); assertEquals("short -> double", true, ClassUtils.isAssignable(Short.TYPE, Double.TYPE)); assertEquals("short -> boolean", false, ClassUtils.isAssignable(Short.TYPE, Boolean.TYPE)); // test char conversions assertEquals("char -> char", true, ClassUtils.isAssignable(Character.TYPE, Character.TYPE)); assertEquals("char -> byte", false, ClassUtils.isAssignable(Character.TYPE, Byte.TYPE)); assertEquals("char -> short", false, ClassUtils.isAssignable(Character.TYPE, Short.TYPE)); assertEquals("char -> int", true, ClassUtils.isAssignable(Character.TYPE, Integer.TYPE)); assertEquals("char -> long", true, ClassUtils.isAssignable(Character.TYPE, Long.TYPE)); assertEquals("char -> float", true, ClassUtils.isAssignable(Character.TYPE, Float.TYPE)); assertEquals("char -> double", true, ClassUtils.isAssignable(Character.TYPE, Double.TYPE)); assertEquals("char -> boolean", false, ClassUtils.isAssignable(Character.TYPE, Boolean.TYPE)); // test int conversions assertEquals("int -> char", false, ClassUtils.isAssignable(Integer.TYPE, Character.TYPE)); assertEquals("int -> byte", false, ClassUtils.isAssignable(Integer.TYPE, Byte.TYPE)); assertEquals("int -> short", false, ClassUtils.isAssignable(Integer.TYPE, Short.TYPE)); assertEquals("int -> int", true, ClassUtils.isAssignable(Integer.TYPE, Integer.TYPE)); assertEquals("int -> long", true, ClassUtils.isAssignable(Integer.TYPE, Long.TYPE)); assertEquals("int -> float", true, ClassUtils.isAssignable(Integer.TYPE, Float.TYPE)); assertEquals("int -> double", true, ClassUtils.isAssignable(Integer.TYPE, Double.TYPE)); assertEquals("int -> boolean", false, ClassUtils.isAssignable(Integer.TYPE, Boolean.TYPE)); // test long conversions assertEquals("long -> char", false, ClassUtils.isAssignable(Long.TYPE, Character.TYPE)); assertEquals("long -> byte", false, ClassUtils.isAssignable(Long.TYPE, Byte.TYPE)); assertEquals("long -> short", false, ClassUtils.isAssignable(Long.TYPE, Short.TYPE)); assertEquals("long -> int", false, ClassUtils.isAssignable(Long.TYPE, Integer.TYPE)); assertEquals("long -> long", true, ClassUtils.isAssignable(Long.TYPE, Long.TYPE)); assertEquals("long -> float", true, ClassUtils.isAssignable(Long.TYPE, Float.TYPE)); assertEquals("long -> double", true, ClassUtils.isAssignable(Long.TYPE, Double.TYPE)); assertEquals("long -> boolean", false, ClassUtils.isAssignable(Long.TYPE, Boolean.TYPE)); // test float conversions assertEquals("float -> char", false, ClassUtils.isAssignable(Float.TYPE, Character.TYPE)); assertEquals("float -> byte", false, ClassUtils.isAssignable(Float.TYPE, Byte.TYPE)); assertEquals("float -> short", false, ClassUtils.isAssignable(Float.TYPE, Short.TYPE)); assertEquals("float -> int", false, ClassUtils.isAssignable(Float.TYPE, Integer.TYPE)); assertEquals("float -> long", false, ClassUtils.isAssignable(Float.TYPE, Long.TYPE)); assertEquals("float -> float", true, ClassUtils.isAssignable(Float.TYPE, Float.TYPE)); assertEquals("float -> double", true, ClassUtils.isAssignable(Float.TYPE, Double.TYPE)); assertEquals("float -> boolean", false, ClassUtils.isAssignable(Float.TYPE, Boolean.TYPE)); // test float conversions assertEquals("double -> char", false, ClassUtils.isAssignable(Double.TYPE, Character.TYPE)); assertEquals("double -> byte", false, ClassUtils.isAssignable(Double.TYPE, Byte.TYPE)); assertEquals("double -> short", false, ClassUtils.isAssignable(Double.TYPE, Short.TYPE)); assertEquals("double -> int", false, ClassUtils.isAssignable(Double.TYPE, Integer.TYPE)); assertEquals("double -> long", false, ClassUtils.isAssignable(Double.TYPE, Long.TYPE)); assertEquals("double -> float", false, ClassUtils.isAssignable(Double.TYPE, Float.TYPE)); assertEquals("double -> double", true, ClassUtils.isAssignable(Double.TYPE, Double.TYPE)); assertEquals("double -> boolean", false, ClassUtils.isAssignable(Double.TYPE, Boolean.TYPE)); // test float conversions assertEquals("boolean -> char", false, ClassUtils.isAssignable(Boolean.TYPE, Character.TYPE)); assertEquals("boolean -> byte", false, ClassUtils.isAssignable(Boolean.TYPE, Byte.TYPE)); assertEquals("boolean -> short", false, ClassUtils.isAssignable(Boolean.TYPE, Short.TYPE)); assertEquals("boolean -> int", false, ClassUtils.isAssignable(Boolean.TYPE, Integer.TYPE)); assertEquals("boolean -> long", false, ClassUtils.isAssignable(Boolean.TYPE, Long.TYPE)); assertEquals("boolean -> float", false, ClassUtils.isAssignable(Boolean.TYPE, Float.TYPE)); assertEquals("boolean -> double", false, ClassUtils.isAssignable(Boolean.TYPE, Double.TYPE)); assertEquals("boolean -> boolean", true, ClassUtils.isAssignable(Boolean.TYPE, Boolean.TYPE)); } public void testPrimitiveToWrapper() { // test primitive classes assertEquals("boolean -> Boolean.class", Boolean.class, ClassUtils.primitiveToWrapper(Boolean.TYPE)); assertEquals("byte -> Byte.class", Byte.class, ClassUtils.primitiveToWrapper(Byte.TYPE)); assertEquals("char -> Character.class", Character.class, ClassUtils.primitiveToWrapper(Character.TYPE)); assertEquals("short -> Short.class", Short.class, ClassUtils.primitiveToWrapper(Short.TYPE)); assertEquals("int -> Integer.class", Integer.class, ClassUtils.primitiveToWrapper(Integer.TYPE)); assertEquals("long -> Long.class", Long.class, ClassUtils.primitiveToWrapper(Long.TYPE)); assertEquals("double -> Double.class", Double.class, ClassUtils.primitiveToWrapper(Double.TYPE)); assertEquals("float -> Float.class", Float.class, ClassUtils.primitiveToWrapper(Float.TYPE)); // test a few other classes assertEquals("String.class -> String.class", String.class, ClassUtils.primitiveToWrapper(String.class)); assertEquals("ClassUtils.class -> ClassUtils.class", org.apache.commons.lang.ClassUtils.class, ClassUtils.primitiveToWrapper(org.apache.commons.lang.ClassUtils.class)); assertEquals("Void.TYPE -> Void.TYPE", Void.TYPE, ClassUtils.primitiveToWrapper(Void.TYPE)); // test null assertNull("null -> null", ClassUtils.primitiveToWrapper(null)); } public void testPrimitivesToWrappers() { // test null assertNull("null -> null", ClassUtils.primitivesToWrappers(null)); // test empty array assertEquals("empty -> empty", ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.primitivesToWrappers(ArrayUtils.EMPTY_CLASS_ARRAY)); // 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 }; Class[] wrappers= ClassUtils.primitivesToWrappers(primitives); for (int i=0; i < primitives.length; i++) { // test each returned wrapper Class primitive = primitives[i]; Class expectedWrapper = ClassUtils.primitiveToWrapper(primitive); assertEquals(primitive + " -> " + expectedWrapper, expectedWrapper, wrappers[i]); } // 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("unmodified", noPrimitives, ClassUtils.primitivesToWrappers(noPrimitives)); } 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 (int i = 0; i < primitives.length; i++) { Class wrapperCls = ClassUtils.primitiveToWrapper(primitives[i]); assertFalse("Still primitive", wrapperCls.isPrimitive()); assertEquals(wrapperCls + " -> " + primitives[i], primitives[i], ClassUtils.wrapperToPrimitive(wrapperCls)); } } public void testWrapperToPrimitiveNoWrapper() { assertNull("Wrong result for non wrapper class", ClassUtils.wrapperToPrimitive(String.class)); } public void testWrapperToPrimitiveNull() { assertNull("Wrong result for null class", ClassUtils.wrapperToPrimitive(null)); } 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 }; Class[] primitives = ClassUtils.wrappersToPrimitives(classes); // now test the result assertEquals("Wrong length of result array", classes.length, primitives.length); for (int i = 0; i < classes.length; i++) { Class expectedPrimitive = ClassUtils.wrapperToPrimitive(classes[i]); assertEquals(classes[i] + " -> " + expectedPrimitive, expectedPrimitive, primitives[i]); } } public void testWrappersToPrimitivesNull() { assertNull("Wrong result for null input", ClassUtils.wrappersToPrimitives(null)); } public void testWrappersToPrimitivesEmpty() { Class[] empty = new Class[0]; assertEquals("Wrong result for empty input", empty, ClassUtils.wrappersToPrimitives(empty)); } public void testGetClassClassNotFound() throws Exception { assertGetClassThrowsClassNotFound( "bool" ); assertGetClassThrowsClassNotFound( "bool[]" ); assertGetClassThrowsClassNotFound( "integer[]" ); } public void testGetClassInvalidArguments() throws Exception { assertGetClassThrowsIllegalArgument( null ); assertGetClassThrowsClassNotFound( "[][][]" ); assertGetClassThrowsClassNotFound( "[[]" ); assertGetClassThrowsClassNotFound( "[" ); assertGetClassThrowsClassNotFound( "java.lang.String][" ); assertGetClassThrowsClassNotFound( ".hello.world" ); assertGetClassThrowsClassNotFound( "hello..world" ); } 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] " ) ); } 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[]" ) ); } 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[][]" ) ); } 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 ); } 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 ); } 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" ) ); } private void assertGetClassReturnsClass( Class c ) throws Exception { assertEquals( c, ClassUtils.getClass( c.getName() ) ); } private void assertGetClassThrowsException( String className, Class exceptionType ) throws Exception { try { ClassUtils.getClass( className ); fail( "ClassUtils.getClass() should fail with an exception of type " + exceptionType.getName() + " when given class name \"" + className + "\"." ); } catch( Exception e ) { assertTrue( exceptionType.isAssignableFrom( e.getClass() ) ); } } private void assertGetClassThrowsIllegalArgument( String className ) throws Exception { assertGetClassThrowsException( className, IllegalArgumentException.class ); } private void assertGetClassThrowsClassNotFound( String className ) throws Exception { assertGetClassThrowsException( className, ClassNotFoundException.class ); } // Show the Java bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4071957 // We may have to delete this if a JDK fixes the bug. public void testShowJavaBug() throws Exception { // Tests with Collections$UnmodifiableSet Set set = Collections.unmodifiableSet(new HashSet()); Method isEmptyMethod = set.getClass().getMethod("isEmpty", new Class[0]); try { isEmptyMethod.invoke(set, new Object[0]); fail("Failed to throw IllegalAccessException as expected"); } catch(IllegalAccessException iae) { // expected } } public void testGetPublicMethod() throws Exception { // Tests with Collections$UnmodifiableSet Set set = Collections.unmodifiableSet(new HashSet()); Method isEmptyMethod = ClassUtils.getPublicMethod(set.getClass(), "isEmpty", new Class[0]); assertTrue(Modifier.isPublic(isEmptyMethod.getDeclaringClass().getModifiers())); try { isEmptyMethod.invoke(set, new Object[0]); } catch(java.lang.IllegalAccessException iae) { fail("Should not have thrown IllegalAccessException"); } // Tests with a public Class Method toStringMethod = ClassUtils.getPublicMethod(Object.class, "toString", new Class[0]); assertEquals(Object.class.getMethod("toString", new Class[0]), toStringMethod); } public void testToClass_object() { assertEquals(null, ClassUtils.toClass(null)); assertSame( ArrayUtils.EMPTY_CLASS_ARRAY, ClassUtils.toClass(new Class[0])); Object[] array = new Object[3]; array[0] = new String("Test"); array[1] = new Integer(1); array[2] = new Double(99); Class[] results = ClassUtils.toClass(array); assertEquals("String", ClassUtils.getShortClassName(results[0])); assertEquals("Integer", ClassUtils.getShortClassName(results[1])); assertEquals("Double", ClassUtils.getShortClassName(results[2])); } public void test_getShortCanonicalName_Object() { assertEquals("", ClassUtils.getShortCanonicalName(null, "")); assertEquals("ClassUtils", ClassUtils.getShortCanonicalName(new ClassUtils(), "")); assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName(new ClassUtils[0], "")); assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName(new ClassUtils[0][0], "")); assertEquals("int[]", ClassUtils.getShortCanonicalName(new int[0], "")); assertEquals("int[][]", ClassUtils.getShortCanonicalName(new int[0][0], "")); } 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)); } public void test_getShortCanonicalName_String() { assertEquals("ClassUtils", ClassUtils.getShortCanonicalName("org.apache.commons.lang.ClassUtils")); assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName("[Lorg.apache.commons.lang.ClassUtils;")); assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName("[[Lorg.apache.commons.lang.ClassUtils;")); assertEquals("ClassUtils[]", ClassUtils.getShortCanonicalName("org.apache.commons.lang.ClassUtils[]")); assertEquals("ClassUtils[][]", ClassUtils.getShortCanonicalName("org.apache.commons.lang.ClassUtils[][]")); assertEquals("int[]", ClassUtils.getShortCanonicalName("[I")); assertEquals("int[][]", ClassUtils.getShortCanonicalName("[[I")); assertEquals("int[]", ClassUtils.getShortCanonicalName("int[]")); assertEquals("int[][]", ClassUtils.getShortCanonicalName("int[][]")); } public void test_getPackageCanonicalName_Object() { assertEquals("", ClassUtils.getPackageCanonicalName(null, "")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName(new ClassUtils(), "")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName(new ClassUtils[0], "")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName(new ClassUtils[0][0], "")); assertEquals("", ClassUtils.getPackageCanonicalName(new int[0], "")); assertEquals("", ClassUtils.getPackageCanonicalName(new int[0][0], "")); } public void test_getPackageCanonicalName_Class() { assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName(ClassUtils.class)); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName(ClassUtils[].class)); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName(ClassUtils[][].class)); assertEquals("", ClassUtils.getPackageCanonicalName(int[].class)); assertEquals("", ClassUtils.getPackageCanonicalName(int[][].class)); } public void test_getPackageCanonicalName_String() { assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName("org.apache.commons.lang.ClassUtils")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName("[Lorg.apache.commons.lang.ClassUtils;")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName("[[Lorg.apache.commons.lang.ClassUtils;")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName("org.apache.commons.lang.ClassUtils[]")); assertEquals("org.apache.commons.lang", ClassUtils.getPackageCanonicalName("org.apache.commons.lang.ClassUtils[][]")); assertEquals("", ClassUtils.getPackageCanonicalName("[I")); assertEquals("", ClassUtils.getPackageCanonicalName("[[I")); assertEquals("", ClassUtils.getPackageCanonicalName("int[]")); assertEquals("", ClassUtils.getPackageCanonicalName("int[][]")); } }