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ImmutableJsonObjectNullTest.java
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ImmutableJsonObjectNullTest.java
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/*
* Copyright (c) 2017 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.json;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;
import org.junit.Test;
/**
* Unit test for {@link ImmutableJsonObjectNull}.
*/
public final class ImmutableJsonObjectNullTest {
@Test
public void assertImmutability() {
assertInstancesOf(ImmutableJsonObjectNull.class, areImmutable());
}
@Test
public void testHashCodeAndEquals() {
final ImmutableJsonObjectNull green = ImmutableJsonObjectNull.getInstance();
final ImmutableJsonObjectNull blue = ImmutableJsonObjectNull.getInstance();
assertThat(green).isEqualTo(green);
assertThat(green).isEqualTo(blue);
assertThat(blue).isEqualTo(ImmutableJsonArrayNull.getInstance());
}
@Test
public void toStringReturnsExpected() {
final ImmutableJsonObjectNull underTest = ImmutableJsonObjectNull.getInstance();
assertThat(underTest.toString()).hasToString("null");
}
}