| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.devtools.build.lib.testutil; |
| |
| import static com.google.common.truth.Truth.assertWithMessage; |
| |
| /** |
| * Test thread implementation that allows the use of assertions within spawned threads. |
| * |
| * <p>Main test method must call {@link TestThread#joinAndAssertState(long)} for each spawned test |
| * thread. |
| */ |
| public final class TestThread extends Thread { |
| private final TestRunnable runnable; |
| |
| private Throwable testException = null; |
| private boolean isSucceeded = false; |
| |
| /** Same as a {@link Runnable} but allowed to throw any exception. */ |
| @FunctionalInterface |
| public interface TestRunnable { |
| void run() throws Exception; |
| } |
| |
| /** Constructs a new test thread that will run the given runnable. */ |
| public TestThread(TestRunnable runnable) { |
| this.runnable = runnable; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| runnable.run(); |
| isSucceeded = true; |
| } catch (Exception | AssertionError e) { |
| testException = e; |
| } |
| } |
| |
| /** |
| * Joins test thread (waiting specified number of ms) and validates that |
| * it has been completed successfully. |
| */ |
| public void joinAndAssertState(long timeout) throws InterruptedException { |
| join(timeout); |
| Throwable exception = this.testException; |
| if (isAlive()) { |
| exception = new AssertionError ( |
| "Test thread " + getName() + " is still alive"); |
| exception.setStackTrace(getStackTrace()); |
| } |
| if(exception != null) { |
| AssertionError error = new AssertionError("Test thread " + getName() + " failed to execute"); |
| error.initCause(exception); |
| throw error; |
| } |
| assertWithMessage("Test thread " + getName() + " has not run successfully").that(isSucceeded) |
| .isTrue(); |
| } |
| } |