1 /* 2 * Copyright (C) 2023 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.car.audio; 18 19 import static com.google.common.truth.Truth.assertWithMessage; 20 21 import static org.junit.Assert.assertThrows; 22 23 import androidx.test.ext.junit.runners.AndroidJUnit4; 24 25 import org.junit.Before; 26 import org.junit.Test; 27 import org.junit.runner.RunWith; 28 29 @RunWith(AndroidJUnit4.class) 30 public final class RequestIdGeneratorTest { 31 32 public static final int MAX_REQUESTS = 5; 33 private RequestIdGenerator mRequestIdGenerator; 34 35 @Before setup()36 public void setup() { 37 mRequestIdGenerator = new RequestIdGenerator(); 38 } 39 40 @Test generateUniqueRequestId()41 public void generateUniqueRequestId() { 42 assertWithMessage("Generated request id") 43 .that(mRequestIdGenerator.generateUniqueRequestId()).isEqualTo(0); 44 } 45 46 @Test generateUniqueRequestId_multipleTimes()47 public void generateUniqueRequestId_multipleTimes() { 48 mRequestIdGenerator.generateUniqueRequestId(); 49 50 long requestId = mRequestIdGenerator.generateUniqueRequestId(); 51 52 assertWithMessage("Second generated request id") 53 .that(requestId).isEqualTo(1); 54 } 55 56 @Test generateUniqueRequestId_afterReleaseReturnPrevRequestId()57 public void generateUniqueRequestId_afterReleaseReturnPrevRequestId() { 58 long requestId = mRequestIdGenerator.generateUniqueRequestId(); 59 mRequestIdGenerator.releaseRequestId(requestId); 60 61 long regeneratedRequestId = mRequestIdGenerator.generateUniqueRequestId(); 62 63 assertWithMessage("Regenerated request id") 64 .that(regeneratedRequestId).isEqualTo(requestId); 65 } 66 67 @Test generateUniqueRequestId_failsAfterLimit()68 public void generateUniqueRequestId_failsAfterLimit() { 69 RequestIdGenerator generator = new RequestIdGenerator(MAX_REQUESTS); 70 71 IllegalStateException thrown = assertThrows(IllegalStateException.class, () -> { 72 for (int c = 0; c < MAX_REQUESTS + 1; c++) { 73 generator.generateUniqueRequestId(); 74 } 75 }); 76 77 assertWithMessage("Over limit request generation exception") 78 .that(thrown).hasMessageThat().contains("Could not generate request id"); 79 } 80 } 81