How to use expectThrows method of org.testng.Assert class

Best Testng code snippet using org.testng.Assert.expectThrows

Source:BodySubscribersTest.java Github

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...39import static java.nio.charset.StandardCharsets.UTF_8;40import static java.nio.file.StandardOpenOption.CREATE;41import static org.testng.Assert.assertTrue;42import static org.testng.Assert.assertNotNull;43import static org.testng.Assert.expectThrows;44import static org.testng.Assert.fail;45public class BodySubscribersTest {46 static final Class<NullPointerException> NPE = NullPointerException.class;47 /​/​ Supplier of BodySubscriber<?>, with a descriptive name48 static class BSSupplier implements Supplier<BodySubscriber<?>> {49 private final Supplier<BodySubscriber<?>> supplier;50 private final String name;51 private BSSupplier(Supplier<BodySubscriber<?>> supplier, String name) {52 this.supplier = supplier;53 this.name = name;54 }55 static BSSupplier create(String name, Supplier<BodySubscriber<?>> supplier) {56 return new BSSupplier(supplier, name);57 }58 @Override public BodySubscriber<?> get() { return supplier.get(); }59 @Override public String toString() { return name; }60 }61 static class LineSubscriber implements Flow.Subscriber<String> {62 @Override public void onSubscribe(Flow.Subscription subscription) { }63 @Override public void onNext(String item) { fail(); }64 @Override public void onError(Throwable throwable) { fail(); }65 @Override public void onComplete() { fail(); }66 }67 static class BBSubscriber implements Flow.Subscriber<List<ByteBuffer>> {68 @Override public void onSubscribe(Flow.Subscription subscription) { }69 @Override public void onNext(List<ByteBuffer> item) { fail(); }70 @Override public void onError(Throwable throwable) { fail(); }71 @Override public void onComplete() { fail(); }72 }73 @DataProvider(name = "bodySubscriberSuppliers")74 public Object[][] bodySubscriberSuppliers() { ;75 List<Supplier<BodySubscriber<?>>> list = List.of(76 BSSupplier.create("ofByteArray", () -> ofByteArray()),77 BSSupplier.create("ofInputStream", () -> ofInputStream()),78 BSSupplier.create("ofBAConsumer", () -> ofByteArrayConsumer(ba -> { })),79 BSSupplier.create("ofLines", () -> ofLines(UTF_8)),80 BSSupplier.create("ofPublisher", () -> ofPublisher()),81 BSSupplier.create("ofFile", () -> ofFile(Path.of("f"))),82 BSSupplier.create("ofFile-opts)", () -> ofFile(Path.of("f"), CREATE)),83 BSSupplier.create("ofString", () -> ofString(UTF_8)),84 BSSupplier.create("buffering", () -> buffering(ofByteArray(), 10)),85 BSSupplier.create("discarding", () -> discarding()),86 BSSupplier.create("mapping", () -> mapping(ofString(UTF_8), s -> s)),87 BSSupplier.create("replacing", () -> replacing("hello")),88 BSSupplier.create("fromSubscriber-1", () -> fromSubscriber(new BBSubscriber())),89 BSSupplier.create("fromSubscriber-2", () -> fromSubscriber(new BBSubscriber(), s -> s)),90 BSSupplier.create("fromLineSubscriber-1", () -> fromLineSubscriber(new LineSubscriber())),91 BSSupplier.create("fromLineSubscriber-2", () -> fromLineSubscriber(new LineSubscriber(), s -> s, UTF_8, ","))92 );93 return list.stream().map(x -> new Object[] { x }).toArray(Object[][]::new);94 }95 @Test(dataProvider = "bodySubscriberSuppliers")96 void nulls(Supplier<BodySubscriber<?>> bodySubscriberSupplier) {97 BodySubscriber<?> bodySubscriber = bodySubscriberSupplier.get();98 boolean subscribed = false;99 do {100 assertNotNull(bodySubscriber.getBody());101 assertNotNull(bodySubscriber.getBody());102 assertNotNull(bodySubscriber.getBody());103 expectThrows(NPE, () -> bodySubscriber.onSubscribe(null));104 expectThrows(NPE, () -> bodySubscriber.onSubscribe(null));105 expectThrows(NPE, () -> bodySubscriber.onSubscribe(null));106 expectThrows(NPE, () -> bodySubscriber.onNext(null));107 expectThrows(NPE, () -> bodySubscriber.onNext(null));108 expectThrows(NPE, () -> bodySubscriber.onNext(null));109 expectThrows(NPE, () -> bodySubscriber.onNext(null));110 expectThrows(NPE, () -> bodySubscriber.onError(null));111 expectThrows(NPE, () -> bodySubscriber.onError(null));112 expectThrows(NPE, () -> bodySubscriber.onError(null));113 if (!subscribed) {114 out.println("subscribing");115 /​/​ subscribe the Subscriber and repeat116 bodySubscriber.onSubscribe(new Flow.Subscription() {117 @Override public void request(long n) { /​* do nothing */​ }118 @Override public void cancel() { fail(); }119 });120 subscribed = true;121 continue;122 }123 break;124 } while (true);125 }126 @Test(dataProvider = "bodySubscriberSuppliers")...

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Source:KafkaAbstractSourceTest.java Github

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...43 @FunctionalInterface44 public interface ThrowingRunnable {45 void run() throws Throwable;46 }47 private static <T extends Exception> void expectThrows(Class<T> expectedType, String expectedMessage, ThrowingRunnable runnable) {48 try {49 runnable.run();50 Assert.fail();51 } catch (Throwable e) {52 if (expectedType.isInstance(e)) {53 T ex = expectedType.cast(e);54 assertEquals(expectedMessage, ex.getMessage());55 return;56 }57 throw new AssertionError("Unexpected exception type, expected " + expectedType.getSimpleName() + " but got " + e);58 }59 throw new AssertionError("Expected exception");60 }61 @Test62 public void testInvalidConfigWillThrownException() throws Exception {63 KafkaAbstractSource source = new DummySource();64 SourceContext ctx = new SourceContext() {65 @Override66 public int getInstanceId() {67 return 0;68 }69 @Override70 public int getNumInstances() {71 return 0;72 }73 @Override74 public void recordMetric(String metricName, double value) {75 }76 @Override77 public String getOutputTopic() {78 return null;79 }80 @Override81 public String getTenant() {82 return null;83 }84 @Override85 public String getNamespace() {86 return null;87 }88 @Override89 public String getSourceName() {90 return null;91 }92 @Override93 public Logger getLogger() {94 return null;95 }96 @Override97 public String getSecret(String key) { return null; }98 };99 Map<String, Object> config = new HashMap<>();100 ThrowingRunnable openAndClose = ()->{101 try {102 source.open(config, ctx);103 fail();104 } finally {105 source.close();106 }107 };108 expectThrows(NullPointerException.class, "Kafka topic is not set", openAndClose);109 config.put("topic", "topic_1");110 expectThrows(NullPointerException.class, "Kafka bootstrapServers is not set", openAndClose);111 config.put("bootstrapServers", "localhost:8080");112 expectThrows(NullPointerException.class, "Kafka consumer group id is not set", openAndClose);113 config.put("groupId", "test-group");114 config.put("fetchMinBytes", -1);115 expectThrows(IllegalArgumentException.class, "Invalid Kafka Consumer fetchMinBytes : -1", openAndClose);116 config.put("fetchMinBytes", 1000);117 config.put("autoCommitEnabled", true);118 config.put("autoCommitIntervalMs", -1);119 expectThrows(IllegalArgumentException.class, "Invalid Kafka Consumer autoCommitIntervalMs : -1", openAndClose);120 config.put("autoCommitIntervalMs", 100);121 config.put("sessionTimeoutMs", -1);122 expectThrows(IllegalArgumentException.class, "Invalid Kafka Consumer sessionTimeoutMs : -1", openAndClose);123 config.put("sessionTimeoutMs", 10000);124 config.put("heartbeatIntervalMs", -100);125 expectThrows(IllegalArgumentException.class, "Invalid Kafka Consumer heartbeatIntervalMs : -100", openAndClose);126 config.put("heartbeatIntervalMs", 20000);127 expectThrows(IllegalArgumentException.class, "Unable to instantiate Kafka consumer", openAndClose);128 config.put("heartbeatIntervalMs", 5000);129 source.open(config, ctx);130 source.close();131 }132 @Test133 public final void loadFromYamlFileTest() throws IOException {134 File yamlFile = getFile("kafkaSourceConfig.yaml");135 KafkaSourceConfig config = KafkaSourceConfig.load(yamlFile.getAbsolutePath());136 assertNotNull(config);137 assertEquals("localhost:6667", config.getBootstrapServers());138 assertEquals("test", config.getTopic());139 assertEquals(Long.parseLong("10000"), config.getSessionTimeoutMs());140 assertEquals(Boolean.parseBoolean("false"), config.isAutoCommitEnabled());141 assertNotNull(config.getConsumerConfigProperties());...

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Source:TestDefaultBehavior.java Github

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...37import org.testng.annotations.Test;38import static java.lang.Boolean.*;39import static java.net.StandardSocketOptions.*;40import static org.testng.Assert.assertEquals;41import static org.testng.Assert.expectThrows;42public class TestDefaultBehavior {43 static final Class<NullPointerException> NPE = NullPointerException.class;44 static final Class<UnsupportedOperationException> UOE = UnsupportedOperationException.class;45 @Test46 public void socketImpl() {47 CustomSocketImpl csi = new CustomSocketImpl();48 assertEquals(csi.supportedOptions().size(), 0);49 expectThrows(NPE, () -> csi.setOption(null, null));50 expectThrows(NPE, () -> csi.setOption(null, 1));51 expectThrows(UOE, () -> csi.setOption(SO_RCVBUF, 100));52 expectThrows(UOE, () -> csi.setOption(SO_KEEPALIVE, TRUE));53 expectThrows(UOE, () -> csi.setOption(SO_KEEPALIVE, FALSE));54 expectThrows(UOE, () -> csi.setOption(FAKE_SOCK_OPT, TRUE));55 expectThrows(UOE, () -> csi.setOption(FAKE_SOCK_OPT, FALSE));56 expectThrows(UOE, () -> csi.setOption(SO_KEEPALIVE, TRUE));57 expectThrows(NPE, () -> csi.getOption(null));58 expectThrows(UOE, () -> csi.getOption(SO_RCVBUF));59 expectThrows(UOE, () -> csi.getOption(SO_KEEPALIVE));60 expectThrows(UOE, () -> csi.getOption(FAKE_SOCK_OPT));61 }62 static final SocketOption<Boolean> FAKE_SOCK_OPT = new SocketOption<>() {63 @Override public String name() { return "FAKE_SOCK_OPT"; }64 @Override public Class<Boolean> type() { return Boolean.class; }65 };66 /​/​ A SocketImpl that delegates the three new-style socket option67 /​/​ methods to the default java.net.SocketImpl implementation.68 static class CustomSocketImpl extends SocketImpl {69 @Override70 public <T> void setOption(SocketOption<T> name, T value) throws IOException {71 super.setOption(name, value);72 }73 @Override74 public Set<SocketOption<?>> supportedOptions() {...

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Source:AssertTest.java Github

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...7import java.util.Set;8import static org.junit.Assert.assertEquals;9import static org.junit.Assert.assertSame;10import static org.junit.Assert.fail;11import static org.testng.Assert.expectThrows;12public class AssertTest {13 @Test14 public void noOrderSuccess() {15 String[] rto1 = { "boolean", "BigInteger", "List",};16 String[] rto2 = { "List", "BigInteger", "boolean",};17 Assert.assertEqualsNoOrder(rto1, rto2);18 }19 @Test(expectedExceptions = AssertionError.class)20 public void noOrderFailure() {21 String[] rto1 = { "a", "a", "b",};22 String[] rto2 = { "a", "b", "b",};23 Assert.assertEqualsNoOrder(rto1, rto2);24 }25 @Test26 public void intArray_Issue4() {27 int[] intArr00 = {1};28 int[] intArr01 = {1};29 Assert.assertEquals(intArr00, intArr01);30 }31 @Test(expectedExceptions = AssertionError.class)32 public void arraysFailures_1() {33 int[] intArr = {1, 2};34 long[] longArr = {1, 2};35 Assert.assertEquals(intArr, longArr);36 }37 @Test(expectedExceptions = AssertionError.class)38 public void arraysFailures_2() {39 int[] intArr = {1, 2};40 Assert.assertEquals(intArr, (long) 1);41 }42 @Test(expectedExceptions = AssertionError.class)43 public void arraysFailures_3() {44 long[] longArr = {1};45 Assert.assertEquals((long) 1, longArr);46 }47 @Test48 public void setsSuccess() {49 Set<Integer> set1 = Sets.newHashSet();50 Set<Integer> set2 = Sets.newHashSet();51 set1.add(1);52 set2.add(1);53 set1.add(3);54 set2.add(3);55 set1.add(2);56 set2.add(2);57 Assert.assertEquals(set1, set2);58 Assert.assertEquals(set2, set1);59 }60 @Test(expectedExceptions = AssertionError.class)61 public void expectThrowsRequiresAnExceptionToBeThrown() {62 expectThrows(Throwable.class, nonThrowingRunnable());63 }64 @Test65 public void expectThrowsIncludesAnInformativeDefaultMessage() {66 try {67 expectThrows(Throwable.class, nonThrowingRunnable());68 } catch (AssertionError ex) {69 assertEquals("Expected Throwable to be thrown, but nothing was thrown", ex.getMessage());70 return;71 }72 fail();73 }74 @Test75 public void expectThrowsReturnsTheSameObjectThrown() {76 NullPointerException npe = new NullPointerException();77 Throwable throwable = expectThrows(Throwable.class, throwingRunnable(npe));78 assertSame(npe, throwable);79 }80 @Test(expectedExceptions = AssertionError.class)81 public void expectThrowsDetectsTypeMismatchesViaExplicitTypeHint() {82 NullPointerException npe = new NullPointerException();83 expectThrows(IOException.class, throwingRunnable(npe));84 }85 @Test86 public void expectThrowsWrapsAndPropagatesUnexpectedExceptions() {87 NullPointerException npe = new NullPointerException("inner-message");88 try {89 expectThrows(IOException.class, throwingRunnable(npe));90 } catch (AssertionError ex) {91 assertSame(npe, ex.getCause());92 assertEquals("inner-message", ex.getCause().getMessage());93 return;94 }95 fail();96 }97 @Test98 public void expectThrowsSuppliesACoherentErrorMessageUponTypeMismatch() {99 NullPointerException npe = new NullPointerException();100 try {101 expectThrows(IOException.class, throwingRunnable(npe));102 } catch (AssertionError error) {103 assertEquals("Expected IOException to be thrown, but NullPointerException was thrown",104 error.getMessage());105 assertSame(npe, error.getCause());106 return;107 }108 fail();109 }110 private static ThrowingRunnable nonThrowingRunnable() {111 return new ThrowingRunnable() {112 public void run() throws Throwable {113 }114 };115 }...

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Source:EndpointConfigurationTest.java Github

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...14import org.eclipse.milo.opcua.stack.core.types.enumerated.MessageSecurityMode;15import org.eclipse.milo.opcua.stack.core.types.structured.UserTokenPolicy;16import org.testng.annotations.Test;17import static org.testng.Assert.assertEquals;18import static org.testng.Assert.expectThrows;19public class EndpointConfigurationTest {20 @Test21 public void securityMismatchThrows() {22 expectThrows(23 IllegalArgumentException.class,24 () ->25 /​/​ mismatch between securityPolicy and securityMode26 EndpointConfiguration.newBuilder()27 .setSecurityPolicy(SecurityPolicy.Basic128Rsa15)28 .setSecurityMode(MessageSecurityMode.None)29 .build()30 );31 expectThrows(32 IllegalArgumentException.class,33 () ->34 /​/​ mismatch between securityPolicy and securityMode35 EndpointConfiguration.newBuilder()36 .setSecurityPolicy(SecurityPolicy.None)37 .setSecurityMode(MessageSecurityMode.SignAndEncrypt)38 .build()39 );40 }41 @Test42 public void missingCertificateThrows() {43 expectThrows(44 IllegalStateException.class,45 () ->46 /​/​ missing certificate47 EndpointConfiguration.newBuilder()48 .setSecurityPolicy(SecurityPolicy.Basic128Rsa15)49 .setSecurityMode(MessageSecurityMode.SignAndEncrypt)50 .build()51 );52 }53 @Test54 public void unsupportedTransportThrows() {55 expectThrows(56 IllegalArgumentException.class,57 () ->58 EndpointConfiguration.newBuilder()59 .setTransportProfile(TransportProfile.HTTPS_UAXML)60 .build()61 );62 expectThrows(63 IllegalArgumentException.class,64 () ->65 EndpointConfiguration.newBuilder()66 .setTransportProfile(TransportProfile.HTTPS_UAJSON)67 .build()68 );69 expectThrows(70 IllegalArgumentException.class,71 () ->72 EndpointConfiguration.newBuilder()73 .setTransportProfile(TransportProfile.WSS_UAJSON)74 .build()75 );76 expectThrows(77 IllegalArgumentException.class,78 () ->79 EndpointConfiguration.newBuilder()80 .setTransportProfile(TransportProfile.WSS_UASC_UABINARY)81 .build()82 );83 }84 @Test85 public void missingTokenPolicyDefaultsToAnonymous() {86 EndpointConfiguration endpointConfiguration =87 EndpointConfiguration.newBuilder().build();88 ImmutableList<UserTokenPolicy> tokenPolicies = endpointConfiguration.getTokenPolicies();89 assertEquals(tokenPolicies.size(), 1);90 assertEquals(tokenPolicies.get(0), EndpointConfiguration.Builder.USER_TOKEN_POLICY_ANONYMOUS);...

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Source:TokenTest.java Github

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1package com.codenjoy.clientrunner.model;2import org.testng.annotations.Test;3import static com.codenjoy.clientrunner.ExceptionAssert.expectThrows;4import static org.testng.Assert.assertEquals;5public class TokenTest {6 private static final String SERVER_URL_PATTERN7 = "^https?:/​/​[0-9A-Za-z_.\\-:]+/​codenjoy-contest/​board/​player/​([\\w]+)\\?code=([\\w]+)";8 public static final String PLAYER_ID = "SuperMario";9 public static final String CODE = "000000000000";10 public static final String VALID_SERVER_URL11 = "http:/​/​5.189.144.144/​codenjoy-contest/​board/​player/​" +12 PLAYER_ID + "?code=" + CODE;13 public static Token generateValidToken() {14 return Token.from(VALID_SERVER_URL, SERVER_URL_PATTERN);15 }16 @Test17 public void shouldGenerateValidToken_whenValidServerUrlPassed() {18 /​/​ when19 Token result = Token.from(VALID_SERVER_URL, SERVER_URL_PATTERN);20 /​/​ then21 assertEquals(result.getServerUrl(), VALID_SERVER_URL);22 assertEquals(result.getPlayerId(), PLAYER_ID);23 assertEquals(result.getCode(), CODE);24 }25 @Test26 public void shouldThrowException_whenInvalidServerUrlPassed() {27 expectThrows(IllegalArgumentException.class,28 "Given invalid server URL: 'Invalid server URL' is not match",29 () -> Token.from("Invalid server URL", SERVER_URL_PATTERN));30 }31 @Test32 public void shouldThrowException_whenNullPassed_asServerUrl() {33 expectThrows(IllegalArgumentException.class,34 "Server URL must not be null",35 () -> Token.from(null, "not null"));36 }37 @Test38 public void shouldThrowException_whenNullPassed_asUrlPattern() {39 expectThrows(IllegalArgumentException.class,40 "URL pattern must not be null",41 () -> Token.from("not null", null));42 }43}...

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Source:DockerConfigTest.java Github

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1package com.codenjoy.clientrunner.config;2import org.testng.annotations.BeforeMethod;3import org.testng.annotations.Test;4import javax.validation.ValidationException;5import static com.codenjoy.clientrunner.ExceptionAssert.expectThrows;6import static org.testng.Assert.assertEquals;7public class DockerConfigTest {8 private DockerConfig.Container container;9 @BeforeMethod10 public void setUp() {11 container = new DockerConfig.Container();12 }13 @Test14 public void shouldValidateException_whenBadMemoryLimit() {15 /​/​ then16 expectThrows(ValidationException.class,17 "the value should be not less than 6MB",18 /​/​ when19 () -> container.setMemoryLimitMB(1));20 }21 @Test22 public void shouldSet_whenMemoryLimitIsZerro() {23 /​/​ when24 container.setMemoryLimitMB(0);25 /​/​ then26 assertEquals(container.getMemoryLimitMB(), 0);27 }28 @Test29 public void shouldSet_whenMemoryLimitIsMoreThanMinimal() {30 /​/​ when...

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expectThrows

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1import org.testng.Assert;2import org.testng.annotations.Test;3import static org.testng.Assert.assertEquals;4public class TestNGAssertExpectThrows {5 public void testExpectThrows() {6 String message = "TestNG Assert expectThrows method";7 Throwable exception = Assert.expectThrows(8 () -> Integer.parseInt("abc"),9 message);10 assertEquals(exception.getMessage(), message);11 }12}13Method testExpectThrows() should have thrown an exception of type java.lang.NumberFormatException14at org.testng.internal.ExpectedExceptionsHolder.verifyException(ExpectedExceptionsHolder.java:84)15at org.testng.internal.Invoker.runTestListeners(Invoker.java:1472)16at org.testng.internal.Invoker.runTestListeners(Invoker.java:1446)17at org.testng.internal.Invoker.invokeMethod(Invoker.java:651)18at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:867)19at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1193)20at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)21at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)22at org.testng.TestRunner.privateRun(TestRunner.java:773)23at org.testng.TestRunner.run(TestRunner.java:623)24at org.testng.SuiteRunner.runTest(SuiteRunner.java:357)25at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352)26at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310)27at org.testng.SuiteRunner.run(SuiteRunner.java:259)28at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)29at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)30at org.testng.TestNG.runSuitesSequentially(TestNG.java:1185)31at org.testng.TestNG.runSuitesLocally(TestNG.java:1110)32at org.testng.TestNG.runSuites(TestNG.java:1029)33at org.testng.TestNG.run(TestNG.java:996)34at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)35at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)36at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)

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expectThrows

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1 public void testExpectThrows(){2 String expectedMessage = "My expected exception message";3 Throwable thrown = expectThrows(IllegalArgumentException.class, () -> {4 throw new IllegalArgumentException(expectedMessage);5 });6 assertEquals(thrown.getMessage(), expectedMessage);7 }8}9import static org.junit.jupiter.api.Assertions.assertEquals;10import static org.junit.jupiter.api.Assertions.assertThrows;11import org.junit.jupiter.api.Test;12public class JUnit5TestExpectThrows {13 public void testExpectThrows(){14 String expectedMessage = "My expected exception message";15 IllegalArgumentException thrown = assertThrows(IllegalArgumentException.class, () -> {16 throw new IllegalArgumentException(expectedMessage);17 });18 assertEquals(thrown.getMessage(), expectedMessage);19 }20}

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