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      1 /*
      2  * Copyright (C) 2015 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 com.android.contacts.common.compat;
     18 
     19 import android.test.AndroidTestCase;
     20 
     21 public class CompatUtilsTest extends AndroidTestCase {
     22 
     23     public void testIsClassAvailable_NullClassName() {
     24         assertFalse(CompatUtils.isClassAvailable(null));
     25     }
     26 
     27     public void testIsClassAvailable_EmptyClassName() {
     28         assertFalse(CompatUtils.isClassAvailable(""));
     29     }
     30 
     31     public void testIsClassAvailable_NonexistentClass() {
     32         assertFalse(CompatUtils.isClassAvailable("com.android.contacts.common.NonexistentClass"));
     33     }
     34 
     35     public void testIsClassAvailable() {
     36         assertTrue(CompatUtils.isClassAvailable(BaseClass.class.getName()));
     37     }
     38 
     39     public void testIsMethodAvailable_NullClassName() {
     40         assertFalse(CompatUtils.isMethodAvailable(null, "methodName"));
     41     }
     42 
     43     public void testIsMethodAvailable_EmptyClassName() {
     44         assertFalse(CompatUtils.isMethodAvailable("", "methodName"));
     45     }
     46 
     47     public void testIsMethodAvailable_NullMethodName() {
     48         assertFalse(CompatUtils.isMethodAvailable("className", null));
     49     }
     50 
     51     public void testIsMethodAvailable_EmptyMethodName() {
     52         assertFalse(CompatUtils.isMethodAvailable("className", ""));
     53     }
     54 
     55     public void testIsMethodAvailable_NonexistentClass() {
     56         assertFalse(CompatUtils.isMethodAvailable("com.android.contacts.common.NonexistentClass",
     57                 ""));
     58     }
     59 
     60     public void testIsMethodAvailable_NonexistentMethod() {
     61         assertFalse(CompatUtils.isMethodAvailable(BaseClass.class.getName(), "derivedMethod"));
     62     }
     63 
     64     public void testIsMethodAvailable() {
     65         assertTrue(CompatUtils.isMethodAvailable(BaseClass.class.getName(), "baseMethod"));
     66     }
     67 
     68     public void testIsMethodAvailable_InheritedMethod() {
     69         assertTrue(CompatUtils.isMethodAvailable(DerivedClass.class.getName(), "baseMethod"));
     70     }
     71 
     72     public void testIsMethodAvailable_OverloadedMethod() {
     73         assertTrue(CompatUtils.isMethodAvailable(DerivedClass.class.getName(), "overloadedMethod"));
     74         assertTrue(CompatUtils.isMethodAvailable(DerivedClass.class.getName(), "overloadedMethod",
     75                 Integer.TYPE));
     76     }
     77 
     78     public void testIsMethodAvailable_NonexistentOverload() {
     79         assertFalse(CompatUtils.isMethodAvailable(DerivedClass.class.getName(), "overloadedMethod",
     80                 Boolean.TYPE));
     81     }
     82 
     83     public void testInvokeMethod_NullMethodName() {
     84         assertNull(CompatUtils.invokeMethod(new BaseClass(), null, null, null));
     85     }
     86 
     87     public void testInvokeMethod_EmptyMethodName() {
     88         assertNull(CompatUtils.invokeMethod(new BaseClass(), "", null, null));
     89     }
     90 
     91     public void testInvokeMethod_NullClassInstance() {
     92         assertNull(CompatUtils.invokeMethod(null, "", null, null));
     93     }
     94 
     95     public void testInvokeMethod_NonexistentMethod() {
     96         assertNull(CompatUtils.invokeMethod(new BaseClass(), "derivedMethod", null, null));
     97     }
     98 
     99     public void testInvokeMethod_MethodWithNoParameters() {
    100         assertEquals(1, CompatUtils.invokeMethod(new DerivedClass(), "overloadedMethod", null, null));
    101     }
    102 
    103     public void testInvokeMethod_MethodWithNoParameters_WithParameters() {
    104         assertNull(CompatUtils.invokeMethod(new DerivedClass(), "derivedMethod",
    105                 new Class<?>[] {Integer.TYPE}, new Object[] {1}));
    106     }
    107 
    108     public void testInvokeMethod_MethodWithParameters_WithEmptyParameterList() {
    109         assertNull(CompatUtils.invokeMethod(new DerivedClass(), "overloadedMethod",
    110                 new Class<?>[] {Integer.TYPE}, new Object[] {}));
    111     }
    112 
    113     public void testInvokeMethod_InvokeSimpleMethod() {
    114         assertEquals(2, CompatUtils.invokeMethod(new DerivedClass(), "overloadedMethod",
    115                 new Class<?>[] {Integer.TYPE}, new Object[] {2}));
    116     }
    117 
    118     private class BaseClass {
    119         public void baseMethod() {}
    120     }
    121 
    122     private class DerivedClass extends BaseClass {
    123         public int derivedMethod() {
    124             // This method needs to return something to differentiate a successful invocation from
    125             // an unsuccessful one.
    126             return 0;
    127         }
    128 
    129         public int overloadedMethod() {
    130             return 1;
    131         }
    132 
    133         public int overloadedMethod(int i) {
    134             return i;
    135         }
    136     }
    137 }
    138