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Throwables_assertHasCauseInstanceOf_Test.java
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Throwables_assertHasCauseInstanceOf_Test.java
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/*
* 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.
*
* Copyright 2012-2024 the original author or authors.
*/
package org.assertj.core.internal.throwables;
import static org.assertj.core.api.Assertions.catchThrowable;
import static org.assertj.core.api.BDDAssertions.then;
import static org.assertj.core.error.ShouldHaveCauseInstance.shouldHaveCauseInstance;
import static org.assertj.core.util.AssertionsUtil.expectAssertionError;
import static org.assertj.core.util.FailureMessages.actualIsNull;
import static org.mockito.Mockito.verify;
import org.assertj.core.internal.ThrowablesBaseTest;
import org.junit.jupiter.api.Test;
/**
* Tests for
* {@link org.assertj.core.internal.Throwables#assertHasCauseInstanceOf(org.assertj.core.api.AssertionInfo, Throwable, Class)}
* .
*
* @author Jean-Christophe Gay
*/
class Throwables_assertHasCauseInstanceOf_Test extends ThrowablesBaseTest {
private final Throwable throwableWithCause = new Throwable(new IllegalArgumentException());
@Test
void should_pass_if_cause_is_exactly_instance_of_expected_type() {
throwables.assertHasCauseInstanceOf(INFO, throwableWithCause, IllegalArgumentException.class);
}
@Test
void should_pass_if_cause_is_instance_of_expected_type() {
throwables.assertHasCauseInstanceOf(INFO, throwableWithCause, RuntimeException.class);
}
@Test
void should_fail_if_actual_is_null() {
// GIVEN
Throwable actual = null;
// WHEN
AssertionError error = expectAssertionError(() -> throwables.assertHasCauseInstanceOf(INFO, actual,
IllegalArgumentException.class));
// THEN
then(error).hasMessage(actualIsNull());
}
@Test
void should_throw_NullPointerException_if_given_type_is_null() {
// GIVEN
Class<? extends Throwable> type = null;
// WHEN
Throwable throwable = catchThrowable(() -> throwables.assertHasCauseInstanceOf(INFO, throwableWithCause, type));
// THEN
then(throwable).isInstanceOf(NullPointerException.class)
.hasMessage("The given type should not be null");
}
@Test
void should_fail_if_actual_has_no_cause() {
// GIVEN
Class<NullPointerException> expectedCauseType = NullPointerException.class;
// WHEN
expectAssertionError(() -> throwables.assertHasCauseInstanceOf(INFO, actual, expectedCauseType));
// THEN
verify(failures).failure(INFO, shouldHaveCauseInstance(actual, expectedCauseType));
}
@Test
void should_fail_if_cause_is_not_instance_of_expected_type() {
// GIVEN
Class<NullPointerException> expectedCauseType = NullPointerException.class;
// WHEN
expectAssertionError(() -> throwables.assertHasCauseInstanceOf(INFO, throwableWithCause, expectedCauseType));
// THEN
verify(failures).failure(INFO, shouldHaveCauseInstance(throwableWithCause, expectedCauseType));
}
}