1/*
2 * Copyright (C) 2016 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 */
16package com.android.car.apps.common.util;
17
18import android.os.Looper;
19import android.util.Log;
20
21/**
22 * A helper class which checks a given runtime assumption. If the assumption fails this class will
23 * log a error and if the current BuildConfig is set to debug the failed assertion will throw an
24 * exception.
25 */
26public class Assert {
27    private static final String TAG = "Em.MediaAssert";
28
29    private Assert() {}
30
31    /**
32     * Checks that the current thread is the main thread and throws an {@link AssertionError} if it
33     * is not.
34     */
35    public static void isMainThread() {
36        if (Looper.myLooper() != Looper.getMainLooper()) {
37            fail("Expected to run on main thread.");
38        }
39    }
40
41    /**
42     * Throws an {@link AssertionError} with the given message. Also will write the message to
43     * {@link Log}.
44     */
45    public static void fail(final String message) {
46        Log.e(TAG, "Assert.fail() called: " + message);
47        throw new AssertionError(message);
48    }
49}