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      1 /*
      2  * Copyright (C) 2008 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.test.suitebuilder;
     18 
     19 import com.android.internal.util.Predicate;
     20 import junit.framework.TestCase;
     21 
     22 import java.lang.annotation.ElementType;
     23 import java.lang.annotation.Retention;
     24 import java.lang.annotation.RetentionPolicy;
     25 import java.lang.annotation.Target;
     26 import java.lang.reflect.Method;
     27 
     28 public class TestPredicatesTest extends TestCase {
     29 
     30     public void testThatMethodWithAnnotationIsReportedAsBeingAnnotated() throws Exception {
     31         assertTrue(hasExampleAnnotation(ClassWithAnnotation.class, "testWithAnnotation"));
     32         assertTrue(hasExampleAnnotation(ClassWithoutAnnotation.class, "testWithAnnotation"));
     33     }
     34 
     35     public void testThatMethodWithOutAnnotationIsNotReportedAsBeingAnnotated() throws Exception {
     36         assertFalse(hasExampleAnnotation(ClassWithoutAnnotation.class, "testWithoutAnnotation"));
     37     }
     38 
     39     public void testThatClassAnnotatioCausesAllMethodsToBeReportedAsBeingAnnotated()
     40             throws Exception {
     41         assertTrue(hasExampleAnnotation(ClassWithAnnotation.class, "testWithoutAnnotation"));
     42     }
     43 
     44     private boolean hasExampleAnnotation(Class<? extends TestCase> aClass, String methodName)
     45             throws NoSuchMethodException {
     46         Method method = aClass.getMethod(methodName);
     47         TestMethod testMethod = new TestMethod(method, aClass);
     48         return TestPredicates.hasAnnotation(Example.class).apply(testMethod);
     49     }
     50 
     51     @Retention(RetentionPolicy.RUNTIME)
     52     @Target({ElementType.TYPE, ElementType.METHOD})
     53     public @interface Example {
     54     }
     55 
     56     @Example
     57     static class ClassWithAnnotation extends TestCase {
     58 
     59         @Example
     60         public void testWithAnnotation() {
     61         }
     62 
     63         public void testWithoutAnnotation() {
     64         }
     65     }
     66 
     67     static class ClassWithoutAnnotation extends TestCase {
     68 
     69         @Example
     70         public void testWithAnnotation() {
     71         }
     72 
     73         public void testWithoutAnnotation() {
     74         }
     75     }
     76 
     77     private static final Predicate<Object> TRUE = new Predicate<Object>() {
     78         public boolean apply(Object o) {
     79             return true;
     80         }
     81     };
     82 
     83     private static final Predicate<Object> FALSE = new Predicate<Object>() {
     84         public boolean apply(Object o) {
     85             return false;
     86         }
     87     };
     88 
     89     public void testNotPredicate() throws Exception {
     90         assertTrue(TestPredicates.not(FALSE).apply(null));
     91         assertFalse(TestPredicates.not(TRUE).apply(null));
     92     }
     93 }
     94