1 /*
2  * Copyright (C) 2017 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.accessibilityservice.cts.utils;
18 
19 
20 import java.util.Optional;
21 import java.util.function.Consumer;
22 
23 public class CtsTestUtils {
CtsTestUtils()24     private CtsTestUtils() {}
25 
assertThrows(Runnable action)26     public static Throwable assertThrows(Runnable action) {
27         return assertThrows(Throwable.class, action);
28     }
29 
assertThrows(Class<E> exceptionClass, Runnable action)30     public static <E extends Throwable> E assertThrows(Class<E> exceptionClass, Runnable action) {
31         try {
32             action.run();
33             throw new AssertionError("Expected an exception");
34         } catch (Throwable e) {
35             if (exceptionClass.isInstance(e)) {
36                 return (E) e;
37             }
38             throw new RuntimeException(e);
39         }
40     }
41 
runIfNotNull(T callee, Consumer<T> action)42     public static <T> void runIfNotNull(T callee, Consumer<T> action) {
43         Optional.ofNullable(callee).ifPresent(action);
44     }
45 }
46