/*
* Copyright 2002-2006 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.core;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import junit.framework.TestCase;
import org.springframework.beans.TestBean;
/**
* @author Adrian Colyer
*/
public class LocalVariableTableParameterNameDiscovererTests extends TestCase {
private LocalVariableTableParameterNameDiscoverer discoverer = new LocalVariableTableParameterNameDiscoverer();
public void testMethodParameterNameDiscoveryNoArgs() throws NoSuchMethodException {
Method getName = TestBean.class.getMethod("getName", new Class[0]);
String[] names = discoverer.getParameterNames(getName);
assertNotNull("should find method info", names);
assertEquals("no argument names", 0, names.length);
}
public void testMethodParameterNameDiscoveryWithArgs() throws NoSuchMethodException {
Method setName = TestBean.class.getMethod("setName", new Class[]{String.class});
String[] names = discoverer.getParameterNames(setName);
assertNotNull("should find method info", names);
assertEquals("one argument", 1, names.length);
assertEquals("name", names[0]);
}
public void testConsParameterNameDiscoveryNoArgs() throws NoSuchMethodException {
Constructor noArgsCons = TestBean.class.getConstructor(new Class[0]);
String[] names = discoverer.getParameterNames(noArgsCons);
assertNotNull("should find cons info", names);
assertEquals("no argument names", 0, names.length);
}
public void testConsParameterNameDiscoveryArgs() throws NoSuchMethodException {
Constructor twoArgCons = TestBean.class.getConstructor(new Class[]{String.class, int.class});
String[] names = discoverer.getParameterNames(twoArgCons);
assertNotNull("should find cons info", names);
assertEquals("one argument", 2, names.length);
assertEquals("name", names[0]);
assertEquals("age", names[1]);
}
public void testStaticMethodParameterNameDiscoveryNoArgs() throws NoSuchMethodException {
Method m = getClass().getMethod("staticMethodNoLocalVars", new Class[0]);
String[] names = discoverer.getParameterNames(m);
assertNotNull("should find method info", names);
assertEquals("no argument names", 0, names.length);
}
public void testOverloadedStaticMethod() throws Exception {
Class clazz = this.getClass();
Method m1 = clazz.getMethod("staticMethod", new Class[]{Long.TYPE, Long.TYPE});
String[] names = discoverer.getParameterNames(m1);
assertNotNull("should find method info", names);
assertEquals("two arguments", 2, names.length);
assertEquals("x", names[0]);
assertEquals("y", names[1]);
Method m2 = clazz.getMethod("staticMethod", new Class[]{Long.TYPE, Long.TYPE, Long.TYPE});
names = discoverer.getParameterNames(m2);
assertNotNull("should find method info", names);
assertEquals("three arguments", 3, names.length);
assertEquals("x", names[0]);
assertEquals("y", names[1]);
assertEquals("z", names[2]);
}
public void testOverloadedStaticMethodInInnerClass() throws Exception {
Class clazz = InnerClass.class;
Method m1 = clazz.getMethod("staticMethod", new Class[]{Long.TYPE});
String[] names = discoverer.getParameterNames(m1);
assertNotNull("should find method info", names);
assertEquals("one argument", 1, names.length);
assertEquals("x", names[0]);
Method m2 = clazz.getMethod("staticMethod", new Class[]{Long.TYPE, Long.TYPE});
names = discoverer.getParameterNames(m2);
assertNotNull("should find method info", names);
assertEquals("two arguments", 2, names.length);
assertEquals("x", names[0]);
assertEquals("y", names[1]);
}
public void testOverloadedMethod() throws Exception {
Class clazz = this.getClass();
Method m1 = clazz.getMethod("instanceMethod", new Class[]{Double.TYPE, Double.TYPE});
String[] names = discoverer.getParameterNames(m1);
assertNotNull("should find method info", names);
assertEquals("two arguments", 2, names.length);
assertEquals("x", names[0]);
assertEquals("y", names[1]);
Method m2 = clazz.getMethod("instanceMethod", new Class[]{Double.TYPE, Double.TYPE, Double.TYPE});
names = discoverer.getParameterNames(m2);
assertNotNull("should find method info", names);
assertEquals("three arguments", 3, names.length);
assertEquals("x", names[0]);
assertEquals("y", names[1]);
assertEquals("z", names[2]);
}
public void testOverloadedMethodInInnerClass() throws Exception {
Class clazz = InnerClass.class;
Method m1 = clazz.getMethod("instanceMethod", new Class[]{String.class});
String[] names = discoverer.getParameterNames(m1);
assertNotNull("should find method info", names);
assertEquals("one argument", 1, names.length);
assertEquals("aa", names[0]);
Method m2 = clazz.getMethod("instanceMethod", new Class[]{String.class, String.class});
names = discoverer.getParameterNames(m2);
assertNotNull("should find method info", names);
assertEquals("two arguments", 2, names.length);
assertEquals("aa", names[0]);
assertEquals("bb", names[1]);
}
public static void staticMethodNoLocalVars() {
}
public static long staticMethod(long x, long y) {
long u = x * y;
return u;
}
public static long staticMethod(long x, long y, long z) {
long u = x * y * z;
return u;
}
public double instanceMethod(double x, double y) {
double u = x * y;
return u;
}
public double instanceMethod(double x, double y, double z) {
double u = x * y * z;
return u;
}
public static class InnerClass {
public int waz = 0;
public InnerClass() {
}
public InnerClass(String firstArg, long secondArg, Object thirdArg) {
long foo = 0;
short bar = 10;
this.waz = (int) (foo + bar);
}
public String instanceMethod(String aa) {
return aa;
}
public String instanceMethod(String aa, String bb) {
return aa + bb;
}
public static long staticMethod(long x) {
long u = x;
return u;
}
public static long staticMethod(long x, long y) {
long u = x * y;
return u;
}
}
}