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/*******************************************************************************
* Copyright (c) 2009, 2019 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.examples;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.junit.matchers.JUnitMatchers.containsString;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import org.hamcrest.Matcher;
import org.junit.rules.ExternalResource;
/**
* In-Memory buffer to assert console output.
*/
public class ConsoleOutput extends ExternalResource {
private final ByteArrayOutputStream buffer;
public final PrintStream stream;
public ConsoleOutput() {
this.buffer = new ByteArrayOutputStream();
try {
this.stream = new PrintStream(buffer, true, "UTF-8");
} catch (UnsupportedEncodingException e) {
throw new AssertionError(e.getMessage());
}
}
@Override
protected void after() {
buffer.reset();
}
public static Matcher<String> containsLine(String line) {
return containsString(String.format("%s%n", line));
}
public static Matcher<String> isEmpty() {
return is("");
}
public String getContents() {
try {
return new String(buffer.toByteArray(), "UTF-8");
} catch (UnsupportedEncodingException e) {
fail(e.getMessage());
return "";
}
}
public void expect(Matcher<String> matcher) {
assertThat(getContents(), matcher);
}
}
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