| // 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.util.io; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| import static com.google.devtools.build.lib.util.StringUtilities.joinLines; |
| |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** |
| * A test for {@link DelegatingOutErr}. |
| */ |
| @RunWith(JUnit4.class) |
| public class DelegatingOutErrTest { |
| |
| private DelegatingOutErr delegate; |
| |
| @Before |
| public final void createDelegate() { |
| delegate = new DelegatingOutErr(); |
| } |
| |
| @After |
| public final void closeDelegate() throws Exception { |
| delegate.close(); |
| } |
| |
| @Test |
| public void testNewDelegateIsLikeDevNull() { |
| delegate.printOut("Hello, world.\n"); |
| delegate.printErr("Feel free to ignore me.\n"); |
| } |
| |
| @Test |
| public void testSubscribeAndUnsubscribeSink() { |
| delegate.printOut("Nobody will listen to this.\n"); |
| RecordingOutErr sink = new RecordingOutErr(); |
| delegate.addSink(sink); |
| delegate.printOutLn("Hello, sink."); |
| delegate.removeSink(sink); |
| delegate.printOutLn("... and alone again ..."); |
| delegate.addSink(sink); |
| delegate.printOutLn("How are things?"); |
| assertThat(sink.outAsLatin1()).isEqualTo("Hello, sink.\nHow are things?\n"); |
| } |
| |
| @Test |
| public void testSubscribeMultipleSinks() { |
| RecordingOutErr left = new RecordingOutErr(); |
| RecordingOutErr right = new RecordingOutErr(); |
| delegate.addSink(left); |
| delegate.printOutLn("left only"); |
| delegate.addSink(right); |
| delegate.printOutLn("both"); |
| delegate.removeSink(left); |
| delegate.printOutLn("right only"); |
| delegate.removeSink(right); |
| delegate.printOutLn("silence"); |
| delegate.addSink(left); |
| delegate.addSink(right); |
| delegate.printOutLn("left and right"); |
| assertThat(left.outAsLatin1()).isEqualTo(joinLines("left only", "both", "left and right", "")); |
| assertThat(right.outAsLatin1()) |
| .isEqualTo(joinLines("both", "right only", "left and right", "")); |
| } |
| } |