1 /*
2  * Copyright (C) 2022 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 package android.car.test;
17 
18 import static com.google.common.truth.Truth.assertWithMessage;
19 
20 import android.util.Log;
21 
22 import org.junit.runner.Description;
23 import org.junit.runners.model.Statement;
24 
25 import java.lang.annotation.Annotation;
26 
27 /**
28  * Provides common {@code JUnit} artifacts for the tests.
29  *
30  */
31 final class JUnitHelper {
32 
33     private static final String TAG = JUnitHelper.class.getSimpleName();
34 
35     // Not a real test (i.e., it doesn't exist on this class), but it's passed to Description
36     private static final String TEST_METHOD_BEING_EXECUTED = "testAmI..OrNot";
37 
newTestMethod(Annotation... annotations)38     public static Description newTestMethod(Annotation... annotations) {
39         return newTestMethod(TEST_METHOD_BEING_EXECUTED, annotations);
40     }
41 
newTestMethod(String methodName, Annotation... annotations)42     public static Description newTestMethod(String methodName, Annotation... annotations) {
43         return Description.createTestDescription(PermissionsCheckerRuleTest.class,
44                 methodName, annotations);
45     }
46 
47     public static final class SimpleStatement<T extends Exception> extends Statement {
48 
49         private boolean mEvaluated;
50         private Throwable mThrowable;
51 
52         @Override
evaluate()53         public void evaluate() throws Throwable {
54             Log.d(TAG, "evaluate() called");
55             mEvaluated = true;
56             if (mThrowable != null) {
57                 Log.d(TAG, "Throwing " + mThrowable);
58                 throw mThrowable;
59             }
60         }
61 
failWith(Throwable t)62         public void failWith(Throwable t) {
63             mThrowable = t;
64         }
65 
assertEvaluated()66         public void assertEvaluated() {
67             assertWithMessage("test method called").that(mEvaluated).isTrue();
68         }
69     }
70 
JUnitHelper()71     private JUnitHelper() {
72         throw new UnsupportedOperationException("contains only static members");
73     }
74 }
75