org.dmfs.jems.hamcrest.matchers.CharSequenceLengthMatcher Maven / Gradle / Ivy
/*
* Copyright 2017 dmfs GmbH
*
*
* 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 org.dmfs.jems.hamcrest.matchers;
import org.hamcrest.Description;
import org.hamcrest.TypeSafeDiagnosingMatcher;
import java.util.Locale;
/**
* Matches the expected length of a {@link CharSequence}.
*
* @author Marten Gajda
*/
public final class CharSequenceLengthMatcher extends TypeSafeDiagnosingMatcher
{
private final int mExpectedValue;
/**
* Checks that the lenght of a {@link CharSequence} is correct.
*
* @param expectedLength
* The expected lenght of the {@link CharSequence}
*
* @return A {@link CharSequenceLengthMatcher}.
*/
public static CharSequenceLengthMatcher hasLength(int expectedLength)
{
return new CharSequenceLengthMatcher(expectedLength);
}
public CharSequenceLengthMatcher(int expectedValue)
{
mExpectedValue = expectedValue;
}
@Override
protected boolean matchesSafely(CharSequence item, Description mismatchDescription)
{
if (item.length() != mExpectedValue)
{
mismatchDescription.appendText(String.format(Locale.ENGLISH, "had length %d", item.length()));
return false;
}
return true;
}
@Override
public void describeTo(Description description)
{
description.appendText(String.format(Locale.ENGLISH, "has length %d", mExpectedValue));
}
}