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// 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.devtools.build.lib.util.StringUtilities.joinLines;
import static org.junit.Assert.assertEquals;
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 {
@Test
public void testNewDelegateIsLikeDevNull() {
DelegatingOutErr delegate = new DelegatingOutErr();
delegate.printOut("Hello, world.\n");
delegate.printErr("Feel free to ignore me.\n");
}
@Test
public void testSubscribeAndUnsubscribeSink() {
DelegatingOutErr delegate = new DelegatingOutErr();
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?");
assertEquals("Hello, sink.\nHow are things?\n", sink.outAsLatin1());
}
@Test
public void testSubscribeMultipleSinks() {
DelegatingOutErr delegate = new DelegatingOutErr();
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");
assertEquals(joinLines("left only", "both", "left and right", ""),
left.outAsLatin1());
assertEquals(joinLines("both", "right only", "left and right", ""),
right.outAsLatin1());
}
}
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