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/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.functional.junit4.matchers;
import org.hamcrest.Description;
import org.hamcrest.Factory;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
/**
* Matcher to check the cause of an exception.
*
* @param the type of {@link Throwable} to match
*/
public class ThrowableCauseMatcher extends TypeSafeMatcher {
private final Matcher matcher;
public ThrowableCauseMatcher(Matcher matcher) {
this.matcher = matcher;
}
public void describeTo(Description description) {
description.appendText("exception with cause ");
description.appendDescriptionOf(matcher);
}
@Override
protected boolean matchesSafely(T item) {
return matcher.matches(item.getCause());
}
@Override
protected void describeMismatchSafely(T item, Description description) {
description.appendText("cause ");
matcher.describeMismatch(item.getCause(), description);
}
@Factory
public static Matcher hasCause(final Matcher matcher) {
return new ThrowableCauseMatcher(matcher);
}
}