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How to use expectCause method of org.junit.rules.ExpectedException class

Best junit code snippet using org.junit.rules.ExpectedException.expectCause

ExpectedException`org.junit.rules.ExpectedException`

The ExpectedException is a rule which helps scripts to verify that the script throws the specific exception or not

Code Snippets

Here are code snippets that can help you understand more how developers are using

Source:ExpectedExceptionTest.java

...249        public void throwExceptionWithMatchingCause() {250            NullPointerException expectedCause = new NullPointerException("expected cause");251            thrown.expect(IllegalArgumentException.class);252            thrown.expectMessage("Ack!");253            thrown.expectCause(is(expectedCause));254            throw new IllegalArgumentException("Ack!", expectedCause);255        }256    }257    public static class ThrowExpectedNullCause {258        @Rule259        public ExpectedException thrown = none();260        @Test261        public void throwExpectedNullCause() {262            thrown.expect(IllegalArgumentException.class);263            thrown.expectMessage("Ack!");264            thrown.expectCause(nullValue(Throwable.class));265            throw new IllegalArgumentException("Ack!");266        }267    }268    public static class ThrowUnexpectedCause {269        @Rule270        public ExpectedException thrown = ExpectedException.none();271        @Test272        public void throwWithCause() {273            thrown.expect(IllegalArgumentException.class);274            thrown.expectMessage("Ack!");275            thrown.expectCause(is(new NullPointerException("expected cause")));276            throw new IllegalArgumentException("Ack!", new NullPointerException("an unexpected cause"));277        }278    }279    280    public static class UseNoCustomMessage {281        @Rule282        public ExpectedException thrown= ExpectedException.none();283        @Test284        public void noThrow() {285            thrown.expect(IllegalArgumentException.class);286        }287    }288    public static class UseCustomMessageWithPlaceHolder {289        @Rule...

Source:LineMessagingClientImplWiremockTest.java

...39        // Mocking40        mocking(400, ERROR_RESPONSE);41        // Expect42        expectedException.expect(ExecutionException.class);43        expectedException.expectCause(isA(BadRequestException.class));44        expectedException.expectCause(errorResponseIs(ERROR_RESPONSE));45        // Do46        lineMessagingClient.getMessageContent("TOKEN").get();47    }48    @Test(timeout = ASYNC_TEST_TIMEOUT)49    public void status401UnauthorizedTest() throws Exception {50        // Mocking51        mocking(401, ERROR_RESPONSE);52        // Expect53        expectedException.expect(ExecutionException.class);54        expectedException.expectCause(isA(UnauthorizedException.class));55        expectedException.expectCause(errorResponseIs(ERROR_RESPONSE));56        // Do57        lineMessagingClient.getMessageContent("TOKEN").get();58    }59    @Test(timeout = ASYNC_TEST_TIMEOUT)60    public void status403ForbiddenTest() throws Exception {61        // Mocking62        mocking(403, ERROR_RESPONSE);63        // Expect64        expectedException.expect(ExecutionException.class);65        expectedException.expectCause(isA(ForbiddenException.class));66        expectedException.expectCause(errorResponseIs(ERROR_RESPONSE));67        // Do68        lineMessagingClient.getMessageContent("TOKEN").get();69    }70    @Test(timeout = ASYNC_TEST_TIMEOUT)71    public void status404NotFoundTest() throws Exception {72        // Mocking73        mocking(404, ERROR_RESPONSE);74        // Expect75        expectedException.expect(ExecutionException.class);76        expectedException.expectCause(isA(NotFoundException.class));77        expectedException.expectCause(errorResponseIs(ERROR_RESPONSE));78        // Do79        lineMessagingClient.getMessageContent("TOKEN").get();80    }81    @Test(timeout = ASYNC_TEST_TIMEOUT)82    public void status429TooManyRequestsTest() throws Exception {83        // Mocking84        mocking(429, ERROR_RESPONSE);85        // Expect86        expectedException.expect(ExecutionException.class);87        expectedException.expectCause(isA(TooManyRequestsException.class));88        expectedException.expectCause(errorResponseIs(ERROR_RESPONSE));89        // Do90        lineMessagingClient.getMessageContent("TOKEN").get();91    }92    @Test(timeout = ASYNC_TEST_TIMEOUT)93    public void status500InternalServerErrorTest() throws Exception {94        // Mocking95        mocking(500, ERROR_RESPONSE);96        // Expect97        expectedException.expect(ExecutionException.class);98        expectedException.expectCause(isA(LineServerException.class));99        expectedException.expectCause(errorResponseIs(ERROR_RESPONSE));100        // Do101        lineMessagingClient.getMessageContent("TOKEN").get();102    }103    private CustomTypeSafeMatcher<LineMessagingException> errorResponseIs(final ErrorResponse errorResponse) {104        return new CustomTypeSafeMatcher<LineMessagingException>("Error Response") {105            @Override106            protected boolean matchesSafely(LineMessagingException item) {107                assertThat(item.getErrorResponse())108                        .isEqualTo(errorResponse);109                return true;110            }111        };112    }113}...

Source:TestSpringIntegrationSecurityIntegrationTest.java

...4243    @Test44    @WithMockUser(username = "jane", roles = { "LOGGER" })45    public void givenRoleLogger_whenSendMessageToDirectChannel_thenAccessDenied() {46        expectedException.expectCause(IsInstanceOf.<Throwable> instanceOf(AccessDeniedException.class));4748        startDirectChannel.send(new GenericMessage<String>(DIRECT_CHANNEL_MESSAGE));49    }5051    @Test52    @WithMockUser(username = "jane")53    public void givenJane_whenSendMessageToDirectChannel_thenAccessDenied() {54        expectedException.expectCause(IsInstanceOf.<Throwable> instanceOf(AccessDeniedException.class));5556        startDirectChannel.send(new GenericMessage<String>(DIRECT_CHANNEL_MESSAGE));57    }5859    @Test60    @WithMockUser(roles = { "VIEWER" })61    public void givenRoleViewer_whenSendToDirectChannel_thenAccessDenied() {62        expectedException.expectCause(IsInstanceOf.<Throwable> instanceOf(AccessDeniedException.class));6364        startDirectChannel.send(new GenericMessage<String>(DIRECT_CHANNEL_MESSAGE));65    }6667    @Test68    @WithMockUser(roles = { "LOGGER", "VIEWER", "EDITOR" })69    public void givenRoleLoggerAndUser_whenSendMessageToDirectChannel_thenFlowCompletedSuccessfully() {70        startDirectChannel.send(new GenericMessage<String>(DIRECT_CHANNEL_MESSAGE));71        assertEquals(DIRECT_CHANNEL_MESSAGE, messageConsumer.getMessageContent());72    }7374    @Test75    @WithMockUser(username = "jane", roles = { "LOGGER", "EDITOR" })76    public void givenJaneLoggerEditor_whenSendToDirectChannel_thenFlowCompleted() {
...

Source:CuentaCorrienteTest4.java

...85//    }86    @Test87    public void abona01_Test() throws Exception {88        thrown.expect(Exception.class);89        thrown.expectCause(Is.isA(IllegalArgumentException.class));90        thrown.expectMessage(CoreMatchers.startsWith("Saldo insuficiente"));91        instance.abona(1_001.0);92    }93    @Test94    public void abona02_Test() throws Exception {95        thrown.expect(Exception.class);96        thrown.expectCause(Is.isA(InvalidParameterException.class));97        thrown.expectMessage(CoreMatchers.startsWith("Abono negativo"));98        instance.abona(-600);99    }100    @Test101    public void ingersa01_Test() throws Exception {102        thrown.expect(Exception.class);103        thrown.expectCause(Is.isA(InvalidParameterException.class));104        thrown.expectMessage(CoreMatchers.startsWith("Ingreso negativo"));105        instance.ingresa(-600);106    }107    @Test108    public void ingersa02_Test() throws Exception {109        instance.ingresa(100);110    }111}...

Source:NotComparableValueTypeTest.java

...48		private PriorityQueue<NonComparable> value;49	}50	@Test51	public void setOfNonComparables() {52		expectedException.expectCause(isA(GenericParameterNotComparableException.class));53		random(WithSet.class);54	}55	@Test56	public void mapOfNonComparables() {57		expectedException.expectCause(isA(GenericParameterNotComparableException.class));58		random(WithMap.class);59	}60	@Test61	public void multimapOfNonComparables() {62		expectedException.expectCause(isA(GenericParameterNotComparableException.class));63		random(WithMultimap.class);64	}65	@Test66	public void priorityQueueOfNonComparables() {67		expectedException.expectCause(isA(GenericParameterNotComparableException.class));68		random(WithPriorityQueue.class);69	}70}...

Source:FactoryBasedJ8UnitTestTest.java

...23    @Test24    public void testRuntimeExceptionFailure() {25        this.thrown.expect(AssertionError.class);26        this.thrown.expectMessage("Failed to create new subject-under-test instance!");27        this.thrown.expectCause(isA(NullPointerException.class));28        this.thrown.expectCause(hasMessage(equalTo("Intended runtime failure!")));29        final FactoryBasedJ8UnitTest<String> t = () -> () -> {30            throw new NullPointerException("Intended runtime failure!");31        };32        t.createNewSUT();33    }34    @Test35    public void testCheckedExceptionFailure() {36        this.thrown.expect(AssertionError.class);37        this.thrown.expectMessage("Failed to create new subject-under-test instance!");38        this.thrown.expectCause(isA(IOException.class));39        this.thrown.expectCause(hasMessage(equalTo("Intended checked failure!")));40        final FactoryBasedJ8UnitTest<String> t = () -> () -> {41            throw new IOException("Intended checked failure!");42        };43        t.createNewSUT();44    }45    @Test46    public void testAssumptionFailure() {47        this.thrown.expect(AssumptionViolatedException.class);48        this.thrown.expectMessage("This assumption violation must be rethrown without any enevloping exception!");49        final FactoryBasedJ8UnitTest<String> t = () -> () -> {50            throw new AssumptionViolatedException("This assumption violation must be rethrown without any enevloping exception!");51        };52        t.createNewSUT();53    }...

Source:TestBase.java

...25    }26    public void expectMessage(Matcher<String> matcher) {27        expected.expectMessage(matcher);28    }29    public void expectCause(Matcher<? extends Throwable> expectedCause) {30        expected.expectCause(expectedCause);31    }32}

Source:ExpectedException.java

...7  public void expect(org.hamcrest.Matcher<?>);8  public void expect(java.lang.Class<? extends java.lang.Throwable>);9  public void expectMessage(java.lang.String);10  public void expectMessage(org.hamcrest.Matcher<java.lang.String>);11  public void expectCause(org.hamcrest.Matcher<?>);12  public final boolean isAnyExceptionExpected();13  static void access$000(org.junit.rules.ExpectedException, java.lang.Throwable) throws java.lang.Throwable;14  static void access$100(org.junit.rules.ExpectedException) throws java.lang.AssertionError;15}...

expectCause

Using AI Code Generation

1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ExpectedException;4public class TestException {5    public ExpectedException thrown = ExpectedException.none();6    public void testExceptionMessage() {7        thrown.expect(IllegalArgumentException.class);8        thrown.expectMessage("a message");9        throw new IllegalArgumentException("a message");10    }11    public void testExceptionMessageWithCause() {12        thrown.expect(IllegalArgumentException.class);13        thrown.expectMessage("a message");14        thrown.expectCause(NullPointerException.class);15        throw new IllegalArgumentException("a message", new NullPointerException());16    }17}18org.junit.ComparisonFailure: expected:<...tMessage("a messag[ ]")> but was:<...tMessage("a messag[e]")>19    at org.junit.Assert.assertEquals(Assert.java:115)20    at org.junit.Assert.assertEquals(Assert.java:144)21    at org.junit.rules.ExpectedException.access$100(ExpectedException.java:108)22    at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:134)23    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)24    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)25    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)26    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)27    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)28    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)29    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)30    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)31    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)32    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)33    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)34    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)35    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)36    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)

expectCause

Using AI Code Generation

1import org.junit.Test;2import org.junit.rules.ExpectedException;3public class TestExceptionCause {4    public void testExceptionCause() {5        ExpectedException thrown = ExpectedException.none();6        thrown.expect(IllegalArgumentException.class);7        thrown.expectCause(isA(NumberFormatException.class));8        throw new IllegalArgumentException(new NumberFormatException());9    }10}11at org.junit.rules.ExpectedException.handleException(ExpectedException.java:268)12at org.junit.rules.ExpectedException.access$200(ExpectedException.java:106)13at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:252)14at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)15at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)16at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)17at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)18at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)19at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)20at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)21at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)22at org.junit.runners.ParentRunner.run(ParentRunner.java:309)23at org.junit.runner.JUnitCore.run(JUnitCore.java:160)24at org.junit.runner.JUnitCore.run(JUnitCore.java:138)25at org.junit.runner.JUnitCore.runMain(JUnitCore.java:117)26at org.junit.runner.JUnitCore.main(JUnitCore.java:96)

expectCause

Using AI Code Generation

1public void testExceptionCause() {2    thrown.expectCause(isA(IllegalArgumentException.class));3    throw new IllegalArgumentException("Test");4}5public ExpectedException thrown = ExpectedException.none();6public void testExceptionMessage() {7    thrown.expect(IllegalArgumentException.class);8    thrown.expectMessage("Test");9    throw new IllegalArgumentException("Test");10}11public void testExceptionMessage() {12    thrown.expect(IllegalArgumentException.class);13    thrown.expectMessage(containsString("Test"));14    throw new IllegalArgumentException("Test");15}16public void testExceptionMessage() {17    thrown.expect(IllegalArgumentException.class);18    thrown.expectMessage(startsWith("Test"));19    throw new IllegalArgumentException("Test");20}21public void testExceptionMessage() {22    thrown.expect(IllegalArgumentException.class);23    thrown.expectMessage(matchesPattern("Test"));24    throw new IllegalArgumentException("Test");25}26public void testExceptionMessage() {27    thrown.expect(IllegalArgumentException.class);28    thrown.expectMessage(is("Test"));29    throw new IllegalArgumentException("Test");30}31public void testExceptionMessage() {32    thrown.expect(IllegalArgumentException.class);33    thrown.expectMessage(equalTo("Test"));34    throw new IllegalArgumentException("Test");35}36public void testExceptionMessage() {37    thrown.expect(IllegalArgumentException.class);38    thrown.expectMessage(is(equalTo("Test")));39    throw new IllegalArgumentException("Test");40}41public void testExceptionMessage() {42    thrown.expect(IllegalArgumentException.class);43    thrown.expectMessage(is(notNullValue()));44    throw new IllegalArgumentException("Test");45}46public void testExceptionMessage() {47    thrown.expect(IllegalArgumentException.class);48    thrown.expectMessage(is(nullValue()));49    throw new IllegalArgumentException("Test");50}51public void testExceptionMessage() {52    thrown.expect(IllegalArgumentException.class);53    thrown.expectMessage(is(not("Test")));54    throw new IllegalArgumentException("Test");55}56public void testExceptionMessage() {57    thrown.expect(IllegalArgumentException.class);58    thrown.expectMessage(is(not(equalTo

expectCause

Using AI Code Generation

1public ExpectedException exception = ExpectedException.none();2public void testException() throws Exception {3    exception.expect(IOException.class);4    throw new IOException();5}6public void testCause() throws Exception {7    exception.expectCause(isA(FileNotFoundException.class));8    throw new IOException(new FileNotFoundException());9}10public ExpectedException exception = ExpectedException.none();11public void testException() throws Exception {12    exception.expect(IOException.class);13    throw new IOException();14}15public void testCause() throws Exception {16    exception.expectCause(isA(FileNotFoundException.class));17    throw new IOException(new FileNotFoundException());18}19	at org.junit.rules.ExpectedException.access$000(ExpectedException.java:108)20	at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:141)21	at org.junit.rules.RunRules.evaluate(RunRules.java:20)22	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)23	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)24	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)25	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)26	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)27	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)28	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)29	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)30	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)

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Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
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Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
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Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
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Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.