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NullSafeComparatorTests.java
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NullSafeComparatorTests.java
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/*
* Copyright 2002-2019 the original author or authors.
*
* 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
*
* https://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.springframework.util.comparator;
import java.util.Comparator;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link NullSafeComparator}.
*
* @author Keith Donald
* @author Chris Beams
* @author Phillip Webb
*/
public class NullSafeComparatorTests {
@SuppressWarnings("unchecked")
@Test
public void shouldCompareWithNullsLow() {
Comparator<String> c = NullSafeComparator.NULLS_LOW;
assertThat(c.compare(null, "boo") < 0).isTrue();
}
@SuppressWarnings("unchecked")
@Test
public void shouldCompareWithNullsHigh() {
Comparator<String> c = NullSafeComparator.NULLS_HIGH;
assertThat(c.compare(null, "boo") > 0).isTrue();
assertThat(c.compare(null, null) == 0).isTrue();
}
}