org.glassfish.tests.utils.junit.matcher.TextFileMatchers Maven / Gradle / Ivy
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* Copyright (c) 2022 Eclipse Foundation and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package org.glassfish.tests.utils.junit.matcher;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeDiagnosingMatcher;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.LineNumberReader;
import java.util.function.Function;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.junit.jupiter.api.Assertions.fail;
/**
* @author David Matejcek
*/
public class TextFileMatchers {
public static Matcher hasLineCount(final long expected) {
return hasLineCount(equalTo(expected));
}
public static Matcher hasLineCount(final Matcher expected) {
return new TypeSafeDiagnosingMatcher<>() {
@Override
public void describeTo(Description description) {
description.appendText("A file with a number of lines: ").appendDescriptionOf(expected);
}
@Override
protected boolean matchesSafely(File item, Description mismatchDescription) {
try (LineNumberReader reader = new LineNumberReader(new FileReader(item))) {
long lineCount = reader.lines().count();
boolean result = expected.matches(lineCount);
if (!result) {
expected.describeMismatch(lineCount, mismatchDescription);
}
return result;
} catch (IOException e) {
return fail(e);
}
}
};
}
public static Matcher getterMatches(final Function fileGetter, final Matcher expected) {
return new TypeSafeDiagnosingMatcher<>() {
@Override
public void describeTo(Description description) {
description.appendText("A file getter `").appendValue(fileGetter).appendText("'")
.appendDescriptionOf(expected);
}
@Override
protected boolean matchesSafely(File item, Description mismatchDescription) {
T value = fileGetter.apply(item);
boolean result = expected.matches(value);
if (!result) {
expected.describeMismatch(value, mismatchDescription);
}
return result;
}
};
}
}