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// Copyright 2014 Google Inc. 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 java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
/**
* An implementation of {@link OutErr} that captures all out / err output and
* makes it available as ISO-8859-1 strings. Useful for implementing test
* cases that assert particular output.
*/
public class RecordingOutErr extends OutErr {
public RecordingOutErr() {
super(new ByteArrayOutputStream(), new ByteArrayOutputStream());
}
public RecordingOutErr(ByteArrayOutputStream out, ByteArrayOutputStream err) {
super(out, err);
}
/**
* Reset the captured content; that is, reset the out / err buffers.
*/
public void reset() {
getOutputStream().reset();
getErrorStream().reset();
}
/**
* Interprets the captured out content as an {@code ISO-8859-1} encoded
* string.
*/
public String outAsLatin1() {
try {
return getOutputStream().toString("ISO-8859-1");
} catch (UnsupportedEncodingException e) {
throw new AssertionError(e);
}
}
/**
* Interprets the captured err content as an {@code ISO-8859-1} encoded
* string.
*/
public String errAsLatin1() {
try {
return getErrorStream().toString("ISO-8859-1");
} catch (UnsupportedEncodingException e) {
throw new AssertionError(e);
}
}
/**
* Returns true if any output was recorded.
*/
public boolean hasRecordedOutput() {
return getOutputStream().size() > 0 || getErrorStream().size() > 0;
}
@Override
public String toString() {
String out = outAsLatin1();
String err = errAsLatin1();
return "" + ((out.length() > 0) ? ("stdout: " + out + "\n") : "")
+ ((err.length() > 0) ? ("stderr: " + err) : "");
}
@Override
public ByteArrayOutputStream getOutputStream() {
return (ByteArrayOutputStream) super.getOutputStream();
}
@Override
public ByteArrayOutputStream getErrorStream() {
return (ByteArrayOutputStream) super.getErrorStream();
}
}
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