/* * Copyright 1999-2011 Alibaba Group. * * 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 com.alibaba.dubbo.common.utils; import static org.junit.Assert.assertThat; import static org.junit.matchers.JUnitMatchers.containsString; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.Collection; import java.util.List; import java.util.Map; import java.util.Set; import junit.framework.TestCase; import org.junit.Test; public class ReflectUtilsTest extends TestCase { public void testIsCompatible() throws Exception { assertEquals(ReflectUtils.isCompatible(short.class, (short)1), true); assertEquals(ReflectUtils.isCompatible(int.class, 1), true); assertEquals(ReflectUtils.isCompatible(double.class, 1.2), true); assertEquals(ReflectUtils.isCompatible(Object.class, 1.2), true); assertEquals(ReflectUtils.isCompatible(List.class, new ArrayList<String>()), true); } public void testNameDesc() throws Exception { // getName assertEquals("boolean", ReflectUtils.getName(boolean.class)); assertEquals("int[][][]", ReflectUtils.getName(int[][][].class)); assertEquals("java.lang.Object[][]", ReflectUtils.getName(Object[][].class)); // getDesc assertEquals("Z", ReflectUtils.getDesc(boolean.class)); assertEquals("[[[I", ReflectUtils.getDesc(int[][][].class)); assertEquals("[[Ljava/lang/Object;", ReflectUtils.getDesc(Object[][].class)); // name2desc assertEquals("Z", ReflectUtils.name2desc(ReflectUtils.getName(boolean.class))); assertEquals("[[[I", ReflectUtils.name2desc(ReflectUtils.getName(int[][][].class))); assertEquals("[[Ljava/lang/Object;", ReflectUtils.name2desc(ReflectUtils.getName(Object[][].class))); // desc2name assertEquals("short[]", ReflectUtils.desc2name(ReflectUtils.getDesc(short[].class))); assertEquals("int", ReflectUtils.desc2name(ReflectUtils.getDesc(int.class))); assertEquals("java.lang.Object[][]", ReflectUtils.desc2name(ReflectUtils.getDesc(Object[][].class))); } public void testName2Class() throws Exception { assertEquals(boolean.class, ReflectUtils.name2class("boolean")); assertEquals(boolean[].class, ReflectUtils.name2class("boolean[]")); assertEquals(int[][].class, ReflectUtils.name2class(ReflectUtils.getName(int[][].class))); assertEquals(ReflectUtilsTest[].class, ReflectUtils.name2class(ReflectUtils.getName(ReflectUtilsTest[].class))); } public void testDesc2Class() throws Exception { assertEquals(boolean.class, ReflectUtils.desc2class("Z")); assertEquals(boolean[].class, ReflectUtils.desc2class("[Z")); assertEquals(int[][].class, ReflectUtils.desc2class(ReflectUtils.getDesc(int[][].class))); assertEquals(ReflectUtilsTest[].class, ReflectUtils.desc2class(ReflectUtils.getDesc(ReflectUtilsTest[].class))); String desc; Class<?>[] cs; cs = new Class<?>[]{ int.class, getClass(), String.class, int[][].class, boolean[].class }; desc = ReflectUtils.getDesc(cs); assertSame(cs, ReflectUtils.desc2classArray(desc)); cs = new Class<?>[]{}; desc = ReflectUtils.getDesc(cs); assertSame(cs, ReflectUtils.desc2classArray(desc)); cs = new Class<?>[]{ void.class, String[].class, int[][].class, ReflectUtilsTest[][].class }; desc = ReflectUtils.getDesc(cs); assertSame(cs, ReflectUtils.desc2classArray(desc)); } protected void assertSame(Class<?>[] cs1, Class<?>[] cs2) throws Exception { assertEquals(cs1.length, cs2.length); for(int i=0;i<cs1.length;i++) assertEquals(cs1[i], cs2[i]); } @Test public void test_findMethodByMethodSignature() throws Exception { Method m = ReflectUtils.findMethodByMethodSignature(TestedClass.class, "method1", null); assertEquals("method1", m.getName()); Class<?>[] parameterTypes = m.getParameterTypes(); assertEquals(1, parameterTypes.length); assertEquals(int.class, parameterTypes[0]); } @Test public void test_findMethodByMethodSignature_override() throws Exception { { Method m = ReflectUtils.findMethodByMethodSignature(TestedClass.class, "overrideMethod", new String[] {"int"}); assertEquals("overrideMethod", m.getName()); Class<?>[] parameterTypes = m.getParameterTypes(); assertEquals(1, parameterTypes.length); assertEquals(int.class, parameterTypes[0]); } { Method m = ReflectUtils.findMethodByMethodSignature(TestedClass.class, "overrideMethod", new String[] {"java.lang.Integer"}); assertEquals("overrideMethod", m.getName()); Class<?>[] parameterTypes = m.getParameterTypes(); assertEquals(1, parameterTypes.length); assertEquals(Integer.class, parameterTypes[0]); } } @Test public void test_findMethodByMethodSignature_override_Morethan1() throws Exception { try { ReflectUtils.findMethodByMethodSignature(TestedClass.class, "overrideMethod", null); fail(); } catch (IllegalStateException expected) { assertThat(expected.getMessage(), containsString( "Not unique method for method name(")); } } @Test public void test_findMethodByMethodSignature_notFound() throws Exception { try { ReflectUtils.findMethodByMethodSignature(TestedClass.class, "notExsited", null); fail(); } catch (NoSuchMethodException expected) { assertThat(expected.getMessage(), containsString("No such method ")); assertThat(expected.getMessage(), containsString("in class")); } } @Test public void test_getEmptyObject() throws Exception { assertTrue(ReflectUtils.getEmptyObject(Collection.class) instanceof Collection); assertTrue(ReflectUtils.getEmptyObject(List.class) instanceof List); assertTrue(ReflectUtils.getEmptyObject(Set.class) instanceof Set); assertTrue(ReflectUtils.getEmptyObject(Map.class) instanceof Map); assertTrue(ReflectUtils.getEmptyObject(Object[].class) instanceof Object[]); assertEquals(ReflectUtils.getEmptyObject(String.class), ""); assertEquals(ReflectUtils.getEmptyObject(short.class), Short.valueOf((short)0)); assertEquals(ReflectUtils.getEmptyObject(byte.class), Byte.valueOf((byte)0)); assertEquals(ReflectUtils.getEmptyObject(int.class), Integer.valueOf(0)); assertEquals(ReflectUtils.getEmptyObject(long.class), Long.valueOf(0)); assertEquals(ReflectUtils.getEmptyObject(float.class), Float.valueOf(0)); assertEquals(ReflectUtils.getEmptyObject(double.class), Double.valueOf(0)); assertEquals(ReflectUtils.getEmptyObject(char.class), Character.valueOf('\0')); assertEquals(ReflectUtils.getEmptyObject(boolean.class), Boolean.FALSE); EmptyClass object = (EmptyClass) ReflectUtils.getEmptyObject(EmptyClass.class); assertNotNull(object); assertNotNull(object.getProperty()); } public static class EmptyClass { private EmptyProperty property; public EmptyProperty getProperty() { return property; } public void setProperty(EmptyProperty property) { this.property = property; } } public static class EmptyProperty { } static class TestedClass { public void method1(int x) { } public void overrideMethod(int x) { } public void overrideMethod(Integer x) { } public void overrideMethod(String s) { } public void overrideMethod(String s1, String s2) { } } }