@Test
public void testHasMethod() throws Exception {
assertTrue(ClassUtils.hasMethod(Collection.class, "size"));
assertTrue(ClassUtils.hasMethod(Collection.class, "remove", Object.class));
assertFalse(ClassUtils.hasMethod(Collection.class, "remove"));
assertFalse(ClassUtils.hasMethod(Collection.class, "someOtherMethod"));
}
@Test
public void testCountOverloadedMethods() {
assertFalse(ClassUtils.hasAtLeastOneMethodWithName(TestObject.class, "foobar"));
// no args
assertTrue(ClassUtils.hasAtLeastOneMethodWithName(TestObject.class, "hashCode"));
// matches although it takes an arg
assertTrue(ClassUtils.hasAtLeastOneMethodWithName(TestObject.class, "setAge"));
}
@Test
public void testAddResourcePathToPackagePath() {
String result = "java/lang/reflect/xyzabc.xml";
assertEquals(result, ClassUtils.addResourcePathToPackagePath(Proxy.class, "xyzabc.xml"));
assertEquals(result, ClassUtils.addResourcePathToPackagePath(Proxy.class, "/xyzabc.xml"));
assertEquals(
"java/lang/reflect/a/b/c/d.xml",
ClassUtils.addResourcePathToPackagePath(Proxy.class, "a/b/c/d.xml"));
}
@Test
public void testGetMethodCountForName() {
assertEquals(
"Verifying number of overloaded 'print' methods for OverloadedMethodsClass.",
2,
ClassUtils.getMethodCountForName(OverloadedMethodsClass.class, "print"));
assertEquals(
"Verifying number of overloaded 'print' methods for SubOverloadedMethodsClass.",
4,
ClassUtils.getMethodCountForName(SubOverloadedMethodsClass.class, "print"));
}
@Test
public void testGetMethodIfAvailable() throws Exception {
Method method = ClassUtils.getMethodIfAvailable(Collection.class, "size");
assertNotNull(method);
assertEquals("size", method.getName());
method =
ClassUtils.getMethodIfAvailable(Collection.class, "remove", new Class[] {Object.class});
assertNotNull(method);
assertEquals("remove", method.getName());
assertNull(ClassUtils.getMethodIfAvailable(Collection.class, "remove"));
assertNull(ClassUtils.getMethodIfAvailable(Collection.class, "someOtherMethod"));
}
@Test
public void testForNameWithPrimitiveClasses() throws ClassNotFoundException {
assertEquals(boolean.class, ClassUtils.forName("boolean", classLoader));
assertEquals(byte.class, ClassUtils.forName("byte", classLoader));
assertEquals(char.class, ClassUtils.forName("char", classLoader));
assertEquals(short.class, ClassUtils.forName("short", classLoader));
assertEquals(int.class, ClassUtils.forName("int", classLoader));
assertEquals(long.class, ClassUtils.forName("long", classLoader));
assertEquals(float.class, ClassUtils.forName("float", classLoader));
assertEquals(double.class, ClassUtils.forName("double", classLoader));
assertEquals(void.class, ClassUtils.forName("void", classLoader));
}
@Test
public void testArgsStaticMethod() throws IllegalAccessException, InvocationTargetException {
Method method =
ClassUtils.getStaticMethod(InnerClass.class, "argStaticMethod", new Class[] {String.class});
method.invoke(null, new Object[] {"test"});
assertTrue("argument method was not invoked.", InnerClass.argCalled);
}
@Test
public void testGetAllInterfaces() {
DerivedTestObject testBean = new DerivedTestObject();
List ifcs = Arrays.asList(ClassUtils.getAllInterfaces(testBean));
assertEquals("Correct number of interfaces", 4, ifcs.size());
assertTrue("Contains Serializable", ifcs.contains(Serializable.class));
assertTrue("Contains ITestBean", ifcs.contains(ITestObject.class));
assertTrue("Contains IOther", ifcs.contains(ITestInterface.class));
}
@Test
public void testForNameWithPrimitiveArrays() throws ClassNotFoundException {
assertEquals(boolean[].class, ClassUtils.forName("boolean[]", classLoader));
assertEquals(byte[].class, ClassUtils.forName("byte[]", classLoader));
assertEquals(char[].class, ClassUtils.forName("char[]", classLoader));
assertEquals(short[].class, ClassUtils.forName("short[]", classLoader));
assertEquals(int[].class, ClassUtils.forName("int[]", classLoader));
assertEquals(long[].class, ClassUtils.forName("long[]", classLoader));
assertEquals(float[].class, ClassUtils.forName("float[]", classLoader));
assertEquals(double[].class, ClassUtils.forName("double[]", classLoader));
}
@Test
public void testForNameWithPrimitiveArraysInternalName() throws ClassNotFoundException {
assertEquals(boolean[].class, ClassUtils.forName(boolean[].class.getName(), classLoader));
assertEquals(byte[].class, ClassUtils.forName(byte[].class.getName(), classLoader));
assertEquals(char[].class, ClassUtils.forName(char[].class.getName(), classLoader));
assertEquals(short[].class, ClassUtils.forName(short[].class.getName(), classLoader));
assertEquals(int[].class, ClassUtils.forName(int[].class.getName(), classLoader));
assertEquals(long[].class, ClassUtils.forName(long[].class.getName(), classLoader));
assertEquals(float[].class, ClassUtils.forName(float[].class.getName(), classLoader));
assertEquals(double[].class, ClassUtils.forName(double[].class.getName(), classLoader));
}
@Test
public void testClassNamesToString() {
List ifcs = new LinkedList();
ifcs.add(Serializable.class);
ifcs.add(Runnable.class);
assertEquals("[interface java.io.Serializable, interface java.lang.Runnable]", ifcs.toString());
assertEquals("[java.io.Serializable, java.lang.Runnable]", ClassUtils.classNamesToString(ifcs));
List classes = new LinkedList();
classes.add(LinkedList.class);
classes.add(Integer.class);
assertEquals("[class java.util.LinkedList, class java.lang.Integer]", classes.toString());
assertEquals(
"[java.util.LinkedList, java.lang.Integer]", ClassUtils.classNamesToString(classes));
assertEquals("[interface java.util.List]", Collections.singletonList(List.class).toString());
assertEquals("[java.util.List]", ClassUtils.classNamesToString(List.class));
assertEquals("[]", Collections.EMPTY_LIST.toString());
assertEquals("[]", ClassUtils.classNamesToString(Collections.EMPTY_LIST));
}
@Test
public void testForName() throws ClassNotFoundException {
assertEquals(String.class, ClassUtils.forName("java.lang.String", classLoader));
assertEquals(String[].class, ClassUtils.forName("java.lang.String[]", classLoader));
assertEquals(String[].class, ClassUtils.forName(String[].class.getName(), classLoader));
assertEquals(String[][].class, ClassUtils.forName(String[][].class.getName(), classLoader));
assertEquals(String[][][].class, ClassUtils.forName(String[][][].class.getName(), classLoader));
assertEquals(
TestObject.class,
ClassUtils.forName("org.springframework.tests.sample.objects.TestObject", classLoader));
assertEquals(
TestObject[].class,
ClassUtils.forName("org.springframework.tests.sample.objects.TestObject[]", classLoader));
assertEquals(TestObject[].class, ClassUtils.forName(TestObject[].class.getName(), classLoader));
assertEquals(
TestObject[][].class,
ClassUtils.forName("org.springframework.tests.sample.objects.TestObject[][]", classLoader));
assertEquals(
TestObject[][].class, ClassUtils.forName(TestObject[][].class.getName(), classLoader));
assertEquals(short[][][].class, ClassUtils.forName("[[[S", classLoader));
}
@Test
public void testIsPresent() throws Exception {
assertTrue(ClassUtils.isPresent("java.lang.String", classLoader));
assertFalse(ClassUtils.isPresent("java.lang.MySpecialString", classLoader));
}
@Test
public void testDetermineCommonAncestor() {
assertEquals(Number.class, ClassUtils.determineCommonAncestor(Integer.class, Number.class));
assertEquals(Number.class, ClassUtils.determineCommonAncestor(Number.class, Integer.class));
assertEquals(Number.class, ClassUtils.determineCommonAncestor(Number.class, null));
assertEquals(Integer.class, ClassUtils.determineCommonAncestor(null, Integer.class));
assertEquals(Integer.class, ClassUtils.determineCommonAncestor(Integer.class, Integer.class));
assertEquals(Number.class, ClassUtils.determineCommonAncestor(Integer.class, Float.class));
assertEquals(Number.class, ClassUtils.determineCommonAncestor(Float.class, Integer.class));
assertNull(ClassUtils.determineCommonAncestor(Integer.class, String.class));
assertNull(ClassUtils.determineCommonAncestor(String.class, Integer.class));
assertEquals(
Collection.class, ClassUtils.determineCommonAncestor(List.class, Collection.class));
assertEquals(
Collection.class, ClassUtils.determineCommonAncestor(Collection.class, List.class));
assertEquals(Collection.class, ClassUtils.determineCommonAncestor(Collection.class, null));
assertEquals(List.class, ClassUtils.determineCommonAncestor(null, List.class));
assertEquals(List.class, ClassUtils.determineCommonAncestor(List.class, List.class));
assertNull(ClassUtils.determineCommonAncestor(List.class, Set.class));
assertNull(ClassUtils.determineCommonAncestor(Set.class, List.class));
assertNull(ClassUtils.determineCommonAncestor(List.class, Runnable.class));
assertNull(ClassUtils.determineCommonAncestor(Runnable.class, List.class));
assertEquals(List.class, ClassUtils.determineCommonAncestor(List.class, ArrayList.class));
assertEquals(List.class, ClassUtils.determineCommonAncestor(ArrayList.class, List.class));
assertNull(ClassUtils.determineCommonAncestor(List.class, String.class));
assertNull(ClassUtils.determineCommonAncestor(String.class, List.class));
}
@Test
public void testGetShortNameForPrimitiveArrayClass() {
String className = ClassUtils.getShortName(byte[].class);
assertEquals("Class name did not match", "byte[]", className);
}
@Test
public void testGetShortNameForInnerClass() {
String className = ClassUtils.getShortName(InnerClass.class);
assertEquals("Class name did not match", "ClassUtilsTests.InnerClass", className);
}
@Test
public void testGetQualifiedNameForMultiDimensionalPrimitiveArrayClass() {
String className = ClassUtils.getQualifiedName(byte[][].class);
assertEquals("Class name did not match", "byte[][]", className);
}
@Test
public void testIsAssignable() {
assertTrue(ClassUtils.isAssignable(Object.class, Object.class));
assertTrue(ClassUtils.isAssignable(String.class, String.class));
assertTrue(ClassUtils.isAssignable(Object.class, String.class));
assertTrue(ClassUtils.isAssignable(Object.class, Integer.class));
assertTrue(ClassUtils.isAssignable(Number.class, Integer.class));
assertTrue(ClassUtils.isAssignable(Number.class, int.class));
assertTrue(ClassUtils.isAssignable(Integer.class, int.class));
assertTrue(ClassUtils.isAssignable(int.class, Integer.class));
assertFalse(ClassUtils.isAssignable(String.class, Object.class));
assertFalse(ClassUtils.isAssignable(Integer.class, Number.class));
assertFalse(ClassUtils.isAssignable(Integer.class, double.class));
assertFalse(ClassUtils.isAssignable(double.class, Integer.class));
}
@Test
public void testGetShortNameAsProperty() {
String shortName = ClassUtils.getShortNameAsProperty(this.getClass());
assertEquals("Class name did not match", "classUtilsTests", shortName);
}
@Test
public void testNoArgsStaticMethod() throws IllegalAccessException, InvocationTargetException {
Method method = ClassUtils.getStaticMethod(InnerClass.class, "staticMethod", (Class[]) null);
method.invoke(null, (Object[]) null);
assertTrue("no argument method was not invoked.", InnerClass.noArgCalled);
}
@Test
public void testGetClassFileName() {
assertEquals("String.class", ClassUtils.getClassFileName(String.class));
assertEquals("ClassUtilsTests.class", ClassUtils.getClassFileName(getClass()));
}
@Test
public void testGetShortName() {
String className = ClassUtils.getShortName(getClass());
assertEquals("Class name did not match", "ClassUtilsTests", className);
}
@Test
public void testGetPackageName() {
assertEquals("java.lang", ClassUtils.getPackageName(String.class));
assertEquals(getClass().getPackage().getName(), ClassUtils.getPackageName(getClass()));
}
@Test
public void testGetQualifiedName() {
String className = ClassUtils.getQualifiedName(getClass());
assertEquals("Class name did not match", "org.springframework.util.ClassUtilsTests", className);
}
@Test
public void testGetShortNameForObjectArrayClass() {
String className = ClassUtils.getShortName(Object[].class);
assertEquals("Class name did not match", "Object[]", className);
}
@Test
public void testClassPackageAsResourcePath() {
String result = ClassUtils.classPackageAsResourcePath(Proxy.class);
assertTrue(result.equals("java/lang/reflect"));
}
@Test
public void testGetQualifiedNameForMultiDimensionalObjectArrayClass() {
String className = ClassUtils.getQualifiedName(Object[][].class);
assertEquals("Class name did not match", "java.lang.Object[][]", className);
}