/*
* Copyright 2004-2012 the original author or authors.
*
* Licensed 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.springframework.binding.method;
import java.io.File;
import java.io.FilenameFilter;
import java.lang.reflect.Method;
import junit.framework.TestCase;
/**
* @author Rob Harrop
* @since 1.0
*/
public class MethodKeyTests extends TestCase {
private static final Method LIST_NO_ARGS = safeGetMethod(File.class, "list", null);
private static final Method LIST_FILENAME_FILTER = safeGetMethod(File.class, "list",
new Class[] { FilenameFilter.class });
public void testGetMethodWithNoArgs() throws Exception {
MethodKey key = new MethodKey(File.class, "list", new Class[0]);
Method m = key.getMethod();
assertEquals(LIST_NO_ARGS, m);
}
public void testGetMoreGenericMethod() throws Exception {
MethodKey key = new MethodKey(Object.class, "equals", new Class[] { Long.class });
assertEquals(safeGetMethod(Object.class, "equals", new Class[] { Object.class }), key.getMethod());
}
public void testGetMethodWithSingleArg() throws Exception {
MethodKey key = new MethodKey(File.class, "list", new Class[] { FilenameFilter.class });
Method m = key.getMethod();
assertEquals(LIST_FILENAME_FILTER, m);
}
public void testGetMethodWithSingleNullArgAndValidMatch() throws Exception {
MethodKey key = new MethodKey(File.class, "list", new Class[] { null });
Method m = key.getMethod();
assertEquals(LIST_FILENAME_FILTER, m);
}
public void testGetMethodWithSingleNullAndUnclearMatch() throws Exception {
new MethodKey(File.class, "listFiles", new Class[] { null });
}
private static final Method safeGetMethod(Class<?> type, String name, Class<?>[] argTypes) {
try {
return type.getMethod(name, argTypes);
} catch (NoSuchMethodException e) {
throw new IllegalStateException("Unable to safely access a known method via reflection. " + e.getMessage());
}
}
}