1 /* 2 * Copyright (C) 2019 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 com.android.compatibility.common.util; 17 18 import static org.junit.Assert.fail; 19 20 // TODO(b/131736394): Remove duplication with HostSideTestUtils. 21 /** Utility class for tests. */ 22 public class CommonTestUtils { 23 @FunctionalInterface 24 public interface BooleanSupplierWithThrow<E extends Throwable> { getAsBoolean()25 boolean getAsBoolean() throws E; 26 } 27 28 /** Wait until {@code predicate} is satisfied, or fail, with a given timeout. */ waitUntil( String message, long timeoutSeconds, BooleanSupplierWithThrow<E> predicate)29 public static <E extends Throwable> void waitUntil( 30 String message, long timeoutSeconds, BooleanSupplierWithThrow<E> predicate) 31 throws E, InterruptedException { 32 int sleep = 125; 33 final long timeout = System.currentTimeMillis() + timeoutSeconds * 1000; 34 while (System.currentTimeMillis() < timeout) { 35 if (predicate.getAsBoolean()) { 36 return; 37 } 38 Thread.sleep(sleep); 39 } 40 fail(message); 41 } 42 } 43