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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.testutil;
import com.google.devtools.build.lib.util.io.FileOutErr;
import com.google.devtools.build.lib.vfs.FileSystemUtils;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
import java.io.File;
import java.io.IOException;
/**
* An implementation of the FileOutErr that uses an in-memory file behind the scenes.
*/
public class TestFileOutErr extends FileOutErr {
public TestFileOutErr() {
super(new FlushingFileRecordingOutputStream(newInMemoryFile("out.log")),
new FlushingFileRecordingOutputStream(newInMemoryFile("err.log")));
}
public TestFileOutErr(Path root) {
super(
new FlushingFileRecordingOutputStream(root.getChild("out.log")),
new FlushingFileRecordingOutputStream(root.getChild("err.log")));
}
private static Path newInMemoryFile(File root, String name) {
InMemoryFileSystem inMemFS = new InMemoryFileSystem();
Path directory = inMemFS.getPath(root.getPath());
try {
FileSystemUtils.createDirectoryAndParents(directory);
} catch (IOException e) {
throw new IllegalStateException(e);
}
return directory.getRelative(name);
}
private static Path newInMemoryFile(String name) {
return newInMemoryFile(new File("/inmem/file_outerr"), name);
}
private static class FlushingFileRecordingOutputStream extends FileRecordingOutputStream {
protected FlushingFileRecordingOutputStream(Path outputFile) {
super(outputFile);
}
@Override
public synchronized void write(byte[] b) throws IOException {
super.write(b);
flush();
}
@Override
public synchronized void write(byte[] b, int off, int len) {
super.write(b, off, len);
try {
flush();
} catch (IOException e) {
recordError(e);
}
}
@Override
public synchronized void write(int b) {
super.write(b);
try {
flush();
} catch (IOException e) {
recordError(e);
}
}
}
public String getRecordedOutput() {
return outAsLatin1() + errAsLatin1();
}
}
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