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How to use ShouldHaveCauseExactlyInstance class of org.assertj.core.error package

Best Assertj code snippet using org.assertj.core.error.ShouldHaveCauseExactlyInstance

Source:Throwables_assertHasCauseExactlyInstanceOf_Test.java

...12 */13package org.assertj.core.internal.throwables;14import org.assertj.core.api.AssertionInfo;15import org.assertj.core.api.Assertions;16import org.assertj.core.error.ShouldHaveCauseExactlyInstance;17import org.assertj.core.internal.ThrowablesBaseTest;18import org.assertj.core.test.TestData;19import org.assertj.core.test.TestFailures;20import org.assertj.core.util.FailureMessages;21import org.junit.jupiter.api.Test;22import org.mockito.Mockito;23/**24 * Tests for25 * {@link org.assertj.core.internal.Throwables#assertHasCauseExactlyInstanceOf(org.assertj.core.api.AssertionInfo, Throwable, Class)}26 * .27 *28 * @author Jean-Christophe Gay29 */30public class Throwables_assertHasCauseExactlyInstanceOf_Test extends ThrowablesBaseTest {31    private Throwable throwableWithCause = new Throwable(new IllegalArgumentException());32    @Test33    public void should_pass_if_cause_is_exactly_instance_of_expected_type() {34        throwables.assertHasCauseExactlyInstanceOf(TestData.someInfo(), throwableWithCause, IllegalArgumentException.class);35    }36    @Test37    public void should_fail_if_actual_is_null() {38        Assertions.assertThatExceptionOfType(AssertionError.class).isThrownBy(() -> throwables.assertHasCauseExactlyInstanceOf(someInfo(), null, .class)).withMessage(FailureMessages.actualIsNull());39    }40    @Test41    public void should_throw_NullPointerException_if_given_type_is_null() {42        Assertions.assertThatNullPointerException().isThrownBy(() -> throwables.assertHasCauseExactlyInstanceOf(someInfo(), throwableWithCause, null)).withMessage("The given type should not be null");43    }44    @Test45    public void should_fail_if_actual_has_no_cause() {46        AssertionInfo info = TestData.someInfo();47        Class<NullPointerException> expectedCauseType = NullPointerException.class;48        try {49            throwables.assertHasCauseExactlyInstanceOf(info, ThrowablesBaseTest.actual, expectedCauseType);50        } catch (AssertionError err) {51            Mockito.verify(failures).failure(info, ShouldHaveCauseExactlyInstance.shouldHaveCauseExactlyInstance(ThrowablesBaseTest.actual, expectedCauseType));52            return;53        }54        TestFailures.failBecauseExpectedAssertionErrorWasNotThrown();55    }56    @Test57    public void should_fail_if_cause_is_not_instance_of_expected_type() {58        AssertionInfo info = TestData.someInfo();59        Class<NullPointerException> expectedCauseType = NullPointerException.class;60        try {61            throwables.assertHasCauseExactlyInstanceOf(info, throwableWithCause, expectedCauseType);62        } catch (AssertionError err) {63            Mockito.verify(failures).failure(info, ShouldHaveCauseExactlyInstance.shouldHaveCauseExactlyInstance(throwableWithCause, expectedCauseType));64            return;65        }66        TestFailures.failBecauseExpectedAssertionErrorWasNotThrown();67    }68    @Test69    public void should_fail_if_cause_is_not_exactly_instance_of_expected_type() {70        AssertionInfo info = TestData.someInfo();71        Class<RuntimeException> expectedCauseType = RuntimeException.class;72        try {73            throwables.assertHasCauseExactlyInstanceOf(info, throwableWithCause, expectedCauseType);74        } catch (AssertionError err) {75            Mockito.verify(failures).failure(info, ShouldHaveCauseExactlyInstance.shouldHaveCauseExactlyInstance(throwableWithCause, expectedCauseType));76            return;77        }78        TestFailures.failBecauseExpectedAssertionErrorWasNotThrown();79    }80}...

ShouldHaveCauseExactlyInstance

Using AI Code Generation

1@DisplayName("should have cause exactly instance of")2    void shouldHaveCauseExactlyInstance() {3        Throwable cause = new Throwable("cause");4        Throwable throwable = new Throwable("throwable", cause);5        ThrowableAssert.ThrowingCallable code = () -> assertThat(throwable).hasCauseExactlyInstanceOf(NullPointerException.class);6        assertThatThrownBy(code)7                .isInstanceOf(AssertionError.class)8                .hasMessage(ShouldHaveCauseExactlyInstance.shouldHaveCauseExactlyInstance(throwable, NullPointerException.class).create());9    }10}

ShouldHaveCauseExactlyInstance

Using AI Code Generation

1import org.assertj.core.error.ShouldHaveCauseExactlyInstance;2import org.assertj.core.error.ErrorMessageFactory;3import java.util.Map;4import static org.assertj.core.api.Assertions.assertThat;5public class ShouldHaveCauseExactlyInstanceExample {6    public static void main(String args[]) {7        try {8            throw new Exception("error", new RuntimeException("cause"));9        } catch (Exception e) {10            ErrorMessageFactory factory = ShouldHaveCauseExactlyInstance.shouldHaveCauseExactlyInstance(e, RuntimeException.class);11            Map<String, Object> data = factory.create();12            assertThat(data.get("message")).isEqualTo("Expecting exception with cause exactly instance of: java.lang.RuntimeException but was: java.lang.RuntimeException");13        }14    }15}16{message=Expecting exception with cause exactly instance of: java.lang.RuntimeException but was: java.lang.RuntimeException}

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