Best Assertj code snippet using org.assertj.core.api.Assertions.assertThatRuntimeException
Source:FileUtilsTest.java  
...40import static java.util.Comparator.comparing;41import static java.util.stream.Collectors.toList;42import static org.assertj.core.api.Assertions.assertThat;43import static org.assertj.core.api.Assertions.assertThatIOException;44import static org.assertj.core.api.Assertions.assertThatRuntimeException;45@FileSystemSource46@DisplayName("FileUtils")47class FileUtilsTest {48    @Nested49    @DisplayName("method 'getFileAttributes'")50    class GetFileAttributes {51        @Test52        @DisplayName("succeeds in getting attributes of file")53        void test0(@Memory FileSystem fileSystem) throws IOException {54            // given55            Path path = fileSystem.getPath("/");56            List<Path> randomFilePaths = TestFileSystemCreator.builder()57                    .minimumFileCount(1)58                    .maximumFileCount(10)59                    .minimumFileLength(128)60                    .maximumFileLength(1024)61                    .fileSuffixes(".alp", ".bet", ".gam", ".del")62                    .build().create(path).get(PathType.FILE);63            // when64            List<BasicFileAttributes> attributes = Files.list(path)65                    .map(FileUtils::getFileAttributes).collect(toList());66            // then67            assertThat(path).hasNoParent();68            assertThat(attributes)69                    .isNotNull()70                    .isNotEmpty()71                    .hasSameSizeAs(randomFilePaths)72                    .doesNotContainNull()73                    .doesNotHaveDuplicates()74                    .allMatch(BasicFileAttributes::isRegularFile)75                    .allMatch(attribute -> attribute.size() > 127)76                    .allMatch(attribute -> attribute.creationTime().toMillis() <= System.currentTimeMillis());77        }78        @Test79        @DisplayName("fails to get attributes of non-existent file")80        void test1(@Memory FileSystem fileSystem) {81            // given82            Path path = fileSystem.getPath("/", "temp-file.txt");83            // expect84            assertThatRuntimeException()85                    .isThrownBy(() -> FileUtils.getFileAttributes(path))86                    .withCauseExactlyInstanceOf(NoSuchFileException.class)87                    .withMessage(path.toString());88        }89    }90    // -------------------------------------------------------------------------------------------------91    @Nested92    @DisplayName("method 'download'")93    class Download {94        @Test95        @DisplayName("succeeds in downloading data in input stream as a file")96        void test0(@TempDir Path tempPath) throws IOException {97            // given98            Map<PathType, List<Path>> pathTypeMap = TestFileSystemCreator.builder()99                    .minimumFileCount(1)100                    .maximumFileCount(1)101                    .minimumFileLength(128)102                    .maximumFileLength(512)103                    .build().create(tempPath);104            Path filePath = pathTypeMap.get(PathType.FILE).get(0);105            // when106            URL url = filePath.toUri().toURL();107            Path dest = tempPath.resolve(filePath.getFileName().toString() + ".bak");108            FileUtils.download(url, dest);109            // then110            assertThat(dest)111                    .isNotNull()112                    .exists()113                    .isNotEmptyFile()114                    .hasSameBinaryContentAs(filePath);115        }116        @Test117        @DisplayName("fails to download data with invalid URL")118        void test1() throws MalformedURLException {119            // given120            Path path = Paths.get(UUID.randomUUID().toString()).toAbsolutePath();121            URL url = path.toUri().toURL();122            // expect123            assertThatRuntimeException()124                    .isThrownBy(() -> FileUtils.download(url, null))125                    .withCauseExactlyInstanceOf(FileNotFoundException.class)126                    .withMessageStartingWith(path.toString());127        }128    }129    // -------------------------------------------------------------------------------------------------130    @Nested131    @DisplayName("method 'deleteRecursively'")132    class DeleteRecursively {133        @RepeatedTest(10)134        @DisplayName("succeeds in deleting files and directories in recursive way")135        void test0(@Memory FileSystem fileSystem) throws IOException {136            // given137            Path path = fileSystem.getPath("/");138            TestFileSystemCreator.builder()139                    .minimumFileCount(2)140                    .maximumFileCount(10)141                    .minimumDirectoryCount(2)142                    .maximumDirectoryCount(10)143                    .minimumFileLength(128)144                    .maximumFileLength(512)145                    .filePrefixes("alpha-", "beta-", "gamma-", "delta-")146                    .build().create(path);147            // when148            Path[] paths = Files.list(path).toArray(Path[]::new);149            for (Path p : paths) {150                FileUtils.deleteRecursively(p);151            }152            // then153            assertThat(Files.list(path))154                    .isNotNull()155                    .isEmpty();156        }157        @Test158        @DisplayName("fails to delete non-existent directory in recursive way")159        void test1(@Memory FileSystem fileSystem) {160            // given161            Path path = fileSystem.getPath("/", "temp");162            // expect163            assertThatRuntimeException()164                    .isThrownBy(() -> FileUtils.deleteRecursively(path))165                    .withCauseExactlyInstanceOf(NoSuchFileException.class)166                    .withMessage(path.toString());167        }168        @Test169        @DisplayName("fails to delete directory that has file in common way")170        void test2(@Memory FileSystem fileSystem) throws IOException {171            // given172            Path path = fileSystem.getPath("/");173            Map<PathType, List<Path>> pathTypeMap = TestFileSystemCreator.builder()174                    .minimumFileCount(1)175                    .maximumFileCount(1)176                    .minimumDirectoryCount(1)177                    .maximumDirectoryCount(1)...Source:Assertions_assertThatRuntimeException_Test.java  
...11 * Copyright 2012-2022 the original author or authors.12 */13package org.assertj.core.api;14import static java.lang.String.format;15import static org.assertj.core.api.Assertions.assertThatRuntimeException;16import static org.assertj.core.api.BDDAssertions.then;17import static org.assertj.core.test.ThrowingCallableFactory.codeThrowing;18import static org.assertj.core.util.AssertionsUtil.expectAssertionError;19import org.assertj.core.api.ThrowableAssert.ThrowingCallable;20import org.junit.jupiter.api.Test;21class Assertions_assertThatRuntimeException_Test {22  @Test23  void should_pass_when_throw_RuntimeException() {24    assertThatRuntimeException().isThrownBy(codeThrowing(new RuntimeException()));25  }26  @Test27  void should_fail_when_throw_wrong_type() {28    // GIVEN29    ThrowingCallable throwingCallable = () -> assertThatRuntimeException().isThrownBy(codeThrowing(new Error()));30    // WHEN31    AssertionError assertionError = expectAssertionError(throwingCallable);32    // THEN33    then(assertionError).hasMessageContainingAll(Error.class.getName(), RuntimeException.class.getName());34  }35  @Test36  void should_fail_when_no_exception_thrown() {37    // GIVEN38    ThrowingCallable throwingCallable = () -> assertThatRuntimeException().isThrownBy(() -> {});39    // WHEN40    AssertionError assertionError = expectAssertionError(throwingCallable);41    // THEN42    then(assertionError).hasMessage(format("%nExpecting code to raise a throwable."));43  }44}...assertThatRuntimeException
Using AI Code Generation
1package org.example;2import org.junit.jupiter.api.Test;3import static org.assertj.core.api.Assertions.assertThatRuntimeException;4public class AppTest {5    public void shouldThrowNullPointerException() {6        assertThatRuntimeException().isThrownBy(() -> {7            throw new NullPointerException();8        }).withMessage("message");9    }10}11	at org.example.AppTest.lambda$shouldThrowNullPointerException$0(AppTest.java:13)12	at org.assertj.core.api.ThrowableAssert.catchThrowable(ThrowableAssert.java:62)13	at org.assertj.core.api.AssertionsForClassTypes.catchThrowable(AssertionsForClassTypes.java:845)14	at org.assertj.core.api.AssertionsForClassTypes.assertThatThrownBy(AssertionsForClassTypes.java:822)15	at org.assertj.core.api.Assertions.assertThatThrownBy(Assertions.java:1603)16	at org.example.AppTest.shouldThrowNullPointerException(AppTest.java:12)17	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)18	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)19	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)20	at java.base/java.lang.reflect.Method.invoke(Method.java:566)21	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688)22	at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)23	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)24	at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)25	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)26	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)27	at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)28	at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)29	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)30	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)31	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)32	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(assertThatRuntimeException
Using AI Code Generation
1package com.ack.junit.assertj;2import org.junit.Test;3import static org.assertj.core.api.Assertions.assertThat;4import static org.assertj.core.api.Assertions.assertThatRuntimeException;5public class AssertJExceptionAssertionTest {6  public void assertJExceptionAssertionTest() {7    assertThatRuntimeException().isThrownBy( () -> {8      throw new RuntimeException( "test" );9    } )10                                .withMessage( "test" );11  }12}13at org.junit.Assert.assertEquals(Assert.java:115)14at org.junit.Assert.assertEquals(Assert.java:144)15at org.assertj.core.api.AbstractThrowableAssert.hasMessage(AbstractThrowableAssert.java:92)16at org.assertj.core.api.ThrowableAssert.hasMessage(ThrowableAssert.java:54)17at org.assertj.core.api.ThrowableAssert.hasMessage(ThrowableAssert.java:33)18at com.ack.junit.assertj.AssertJExceptionAssertionTest.lambda$assertJExceptionAssertionTest$0(AssertJExceptionAssertionTest.java:21)19at org.assertj.core.api.Assertions$ThrowableAssertAlternative.catchThrowable(Assertions.java:1604)20at org.assertj.core.api.Assertions$ThrowableAssertAlternative.catchThrowable(Assertions.java:1584)21at com.ack.junit.assertj.AssertJExceptionAssertionTest.assertJExceptionAssertionTest(AssertJExceptionAssertionTest.java:18)22at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)23at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)24at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)25at java.lang.reflect.Method.invoke(Method.java:498)26at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)27at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)28at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)29at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)30at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)31at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)32at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)33at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)assertThatRuntimeException
Using AI Code Generation
1package org.example;2import org.assertj.core.api.Assertions;3import org.junit.Test;4public class AppTest {5    public void testApp() {6        Assertions.assertThatRuntimeException().isInstanceOf(RuntimeException.class);7    }8}assertThatRuntimeException
Using AI Code Generation
1import org.junit.jupiter.api.Test;2import static org.assertj.core.api.Assertions.*;3public class TestAssertJ {4    public void testAssertJ() {5        assertThatRuntimeException().isThrownBy(() -> {6            throw new RuntimeException();7        });8    }9}10	at org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:57)11	at org.junit.jupiter.api.AssertThrows.assertThrows(AssertThrows.java:37)12	at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1155)13	at org.junit.jupiter.api.Assertions.assertThrows(Assertions.java:1137)14	at org.assertj.core.api.Assertions.assertThatExceptionOfType(Assertions.java:1200)15	at org.assertj.core.api.Assertions.assertThatRuntimeException(Assertions.java:1218)16	at com.javatpoint.TestAssertJ.testAssertJ(TestAssertJ.java:10)17	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)18	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)19	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)20	at java.lang.reflect.Method.invoke(Method.java:498)21	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688)22	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)23	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:171)24	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)25	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:167)26	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:114)27	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59)28	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)29	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)30	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)31	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)assertThatRuntimeException
Using AI Code Generation
1import org.junit.Test;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.api.Assertions.assertThatExceptionOfType;4import static org.assertj.core.api.Assertions.assertThatRuntimeException;5import static org.assertj.core.api.Assertions.assertThatNullPointerException;6import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;7import static org.assertj.core.api.Assertions.assertThatIllegalStateException;8import static org.assertj.core.api.Assertions.assertThatIndexOutOfBoundsException;9import static org.assertj.core.api.Assertions.assertThatArrayIndexOutOfBoundsException;10import static org.assertj.core.api.Assertions.assertThatClassCastException;11import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;12import static org.assertj.core.api.Assertions.assertThatIllegalStateException;13import static org.assertj.core.api.Assertions.assertThatIndexOutOfBoundsException;14import static org.assertj.core.api.Assertions.assertThatArrayIndexOutOfBoundsException;15import static org.assertj.core.api.Assertions.assertThatClassCastException;16import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;17import static org.assertj.core.api.Assertions.assertThatIllegalStateException;18import static org.assertj.core.api.Assertions.assertThatIndexOutOfBoundsException;19import static org.assertj.core.api.Assertions.assertThatArrayIndexOutOfBoundsException;20import static org.assertj.core.api.Assertions.assertThatClassCastException;21public class Test1 {22    public void test1() {23        assertThatNullPointerException();24    }25    public void test2() {26        assertThatIllegalArgumentException();27    }28    public void test3() {29        assertThatIllegalStateException();30    }31    public void test4() {32        assertThatIndexOutOfBoundsException();33    }34    public void test5() {35        assertThatArrayIndexOutOfBoundsException();36    }37    public void test6() {38        assertThatClassCastException();39    }40    public void test7() {41        assertThatIllegalArgumentException();42    }43    public void test8() {44        assertThatIllegalStateException();45    }46    public void test9() {47        assertThatIndexOutOfBoundsException();48    }49    public void test10() {50        assertThatArrayIndexOutOfBoundsException();51    }52    public void test11() {53        assertThatClassCastException();54    }55    public void test12() {56        assertThatIllegalArgumentException();57    }58    public void test13() {59        assertThatIllegalStateException();60    }61    public void test14() {62        assertThatIndexOutOfBoundsException();63    }64    public void test15() {65        assertThatArrayIndexOutOfBoundsException();66    }assertThatRuntimeException
Using AI Code Generation
1package com.ack.junit.assertj;2import org.junit.Test;3import java.io.File;4import static org.assertj.core.api.Assertions.assertThatRuntimeException;5public class AssertJTest3 {6    public void testAssertJException() {7        assertThatRuntimeException()8                .isThrownBy(() -> new File("somefile.txt").getCanonicalPath())9                .withMessageContaining("somefile.txt")10                .withNoCause();11    }12}13package com.ack.junit.assertj;14import org.junit.Test;15import java.io.File;16import static org.assertj.core.api.Assertions.assertThatExceptionOfType;17public class AssertJTest4 {18    public void testAssertJException() {19        assertThatExceptionOfType(Exception.class)20                .isThrownBy(() -> new File("somefile.txt").getCanonicalPath())21                .withMessageContaining("somefile.txt")22                .withNoCause();23    }24}assertThatRuntimeException
Using AI Code Generation
1import org.assertj.core.api.ThrowableAssert.ThrowingCallable;2import org.junit.Test;3import static org.assertj.core.api.Assertions.assertThat;4import static org.assertj.core.api.Assertions.assertThatExceptionOfType;5import static org.assertj.core.api.Assertions.assertThatRuntimeException;6public class AssertJTest {7   public void test1() {8      assertThatExceptionOfType(IllegalArgumentException.class).isThrownBy(new ThrowingCallable() {9         public void call() throws Throwable {10            throw new IllegalArgumentException("invalid");11         }12      }).withMessage("invalid");13   }14   public void test2() {15      assertThatRuntimeException().isThrownBy(new ThrowingCallable() {16         public void call() throws Throwable {17            throw new RuntimeException("invalid");18         }19      }).withMessage("invalid");20   }21}22at org.junit.Assert.fail(Assert.java:89)23at org.junit.Assert.failNotEquals(Assert.java:835)24at org.junit.Assert.assertSame(Assert.java:787)25at org.junit.Assert.assertSame(Assert.java:797)26at org.assertj.core.api.Assertions.assertSame(Assertions.java:113)27at org.assertj.core.api.AssertionsAssert.isInstanceOf(AssertionsAssert.java:61)28at org.assertj.core.api.AssertionsAssert.isInstanceOf(AssertionsAssert.java:31)29at org.assertj.core.api.Assertions.isInstanceOf(Assertions.java:359)30at org.assertj.core.api.Assertions.isInstanceOf(Assertions.java:34)31at AssertJTest.test1(AssertJLearn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
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