Use Code: LCMYEARENDEXCL30Best junit code snippet using org.junit.rules.ExpectedException
org.junit.rules.ExpectedExceptionThe ExpectedException is a rule which helps scripts to verify that the script throws the specific exception or not
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Source:ExpectedExceptionCheckerTest.java 
...17import com.google.errorprone.BugCheckerRefactoringTestHelper;18import org.junit.Test;19import org.junit.runner.RunWith;20import org.junit.runners.JUnit4;21/** {@link ExpectedExceptionChecker}Test. */22@RunWith(JUnit4.class)23public class ExpectedExceptionCheckerTest {24 private final BugCheckerRefactoringTestHelper testHelper =25 BugCheckerRefactoringTestHelper.newInstance(ExpectedExceptionChecker.class, getClass());26 @Test27 public void expect() {28 testHelper29 .addInputLines(30 "in/ExceptionTest.java",31 "import static com.google.common.truth.Truth.assertThat;",32 "import java.io.IOException;",33 "import java.nio.file.*;",34 "import org.junit.Test;",35 "import org.junit.Rule;",36 "import org.hamcrest.CoreMatchers;",37 "import org.junit.rules.ExpectedException;",38 "class ExceptionTest {",39 " @Rule ExpectedException thrown = ExpectedException.none();",40 " @Test",41 " public void test() throws Exception {",42 " if (true) {",43 " Path p = Paths.get(\"NOSUCH\");",44 " thrown.expect(IOException.class);",45 " thrown.expect(CoreMatchers.is(CoreMatchers.instanceOf(IOException.class)));",46 " thrown.expectCause(",47 " CoreMatchers.is(CoreMatchers.instanceOf(IOException.class)));",48 " thrown.expectMessage(\"error\");",49 " thrown.expectMessage(CoreMatchers.containsString(\"error\"));",50 " Files.readAllBytes(p);",51 " assertThat(Files.exists(p)).isFalse();",52 " }",53 " }",54 "}")55 .addOutputLines(56 "out/ExceptionTest.java",57 "import static com.google.common.truth.Truth.assertThat;",58 "import static org.hamcrest.MatcherAssert.assertThat;",59 "import static org.junit.Assert.assertThrows;",60 "",61 "import java.io.IOException;",62 "import java.nio.file.*;",63 "import org.hamcrest.CoreMatchers;",64 "import org.junit.Rule;",65 "import org.junit.Test;",66 "import org.junit.rules.ExpectedException;",67 "class ExceptionTest {",68 " @Rule ExpectedException thrown = ExpectedException.none();",69 " @Test",70 " public void test() throws Exception {",71 " if (true) {",72 " Path p = Paths.get(\"NOSUCH\");",73 " IOException thrown =",74 " assertThrows(IOException.class, () -> Files.readAllBytes(p));",75 " assertThat(thrown,",76 " CoreMatchers.is(CoreMatchers.instanceOf(IOException.class)));",77 " assertThat(thrown.getCause(),",78 " CoreMatchers.is(CoreMatchers.instanceOf(IOException.class)));",79 " assertThat(thrown).hasMessageThat().contains(\"error\");",80 " assertThat(thrown.getMessage(), CoreMatchers.containsString(\"error\"));",81 " assertThat(Files.exists(p)).isFalse();",82 " }",83 " }",84 "}")85 .doTest();86 }87 @Test88 public void noExceptionType() {89 testHelper90 .addInputLines(91 "in/ExceptionTest.java",92 "import static com.google.common.truth.Truth.assertThat;",93 "import java.io.IOException;",94 "import java.nio.file.*;",95 "import org.hamcrest.CoreMatchers;",96 "import org.junit.Rule;",97 "import org.junit.Test;",98 "import org.junit.rules.ExpectedException;",99 "class ExceptionTest {",100 " @Rule ExpectedException thrown = ExpectedException.none();",101 " @Test",102 " public void test() throws Exception {",103 " Path p = Paths.get(\"NOSUCH\");",104 " thrown.expect(CoreMatchers.is(CoreMatchers.instanceOf(IOException.class)));",105 " Files.readAllBytes(p);",106 " Files.readAllBytes(p);",107 " }",108 "}")109 .addOutputLines(110 "out/ExceptionTest.java",111 "import static com.google.common.truth.Truth.assertThat;",112 "import static org.hamcrest.MatcherAssert.assertThat;",113 "import static org.junit.Assert.assertThrows;",114 "",115 "import java.io.IOException;",116 "import java.nio.file.*;",117 "import org.hamcrest.CoreMatchers;",118 "import org.junit.Rule;",119 "import org.junit.Test;",120 "import org.junit.rules.ExpectedException;",121 "class ExceptionTest {",122 " @Rule ExpectedException thrown = ExpectedException.none();",123 " @Test",124 " public void test() throws Exception {",125 " Path p = Paths.get(\"NOSUCH\");",126 " Throwable thrown = assertThrows(Throwable.class, () -> {",127 " Files.readAllBytes(p);",128 " Files.readAllBytes(p);",129 " });",130 " assertThat(thrown, CoreMatchers.is(CoreMatchers.instanceOf(IOException.class)));",131 " }",132 "}")133 .doTest();134 }135 @Test136 public void noExpectations() {137 testHelper138 .addInputLines(139 "in/ExceptionTest.java",140 "import static com.google.common.truth.Truth.assertThat;",141 "import java.io.IOException;",142 "import java.nio.file.*;",143 "import org.hamcrest.CoreMatchers;",144 "import org.junit.Rule;",145 "import org.junit.Test;",146 "import org.junit.rules.ExpectedException;",147 "class ExceptionTest {",148 " @Rule ExpectedException thrown = ExpectedException.none();",149 " @Test",150 " public void test() throws Exception {",151 " Path p = Paths.get(\"NOSUCH\");",152 " thrown.expect(IOException.class);",153 " Files.readAllBytes(p);",154 " assertThat(Files.exists(p)).isFalse();",155 " }",156 "}")157 .addOutputLines(158 "out/ExceptionTest.java",159 "import static com.google.common.truth.Truth.assertThat;",160 "import static org.junit.Assert.assertThrows;",161 "import java.io.IOException;",162 "import java.nio.file.*;",163 "import org.hamcrest.CoreMatchers;",164 "import org.junit.Rule;",165 "import org.junit.Test;",166 "import org.junit.rules.ExpectedException;",167 "class ExceptionTest {",168 " @Rule ExpectedException thrown = ExpectedException.none();",169 " @Test",170 " public void test() throws Exception {",171 " Path p = Paths.get(\"NOSUCH\");",172 " assertThrows(IOException.class, () -> Files.readAllBytes(p));",173 " assertThat(Files.exists(p)).isFalse();",174 " }",175 "}")176 .doTest();177 }178 @Test179 public void nonExpressionStatement() {180 testHelper181 .addInputLines(182 "in/ExceptionTest.java",183 "import static com.google.common.truth.Truth.assertThat;",184 "import java.io.IOException;",185 "import java.nio.file.*;",186 "import org.junit.Rule;",187 "import org.junit.Test;",188 "import org.junit.rules.ExpectedException;",189 "class ExceptionTest {",190 " @Rule ExpectedException thrown = ExpectedException.none();",191 " @Test",192 " public void test() throws Exception {",193 " Path p = Paths.get(\"NOSUCH\");",194 " thrown.expect(IOException.class);",195 " Files.readAllBytes(p);",196 " if (true) Files.readAllBytes(p);",197 " }",198 "}")199 .addOutputLines(200 "out/ExceptionTest.java",201 "import static com.google.common.truth.Truth.assertThat;",202 "import static org.junit.Assert.assertThrows;",203 "",204 "import java.io.IOException;",205 "import java.nio.file.*;",206 "import org.junit.Rule;",207 "import org.junit.Test;",208 "import org.junit.rules.ExpectedException;",209 "class ExceptionTest {",210 " @Rule ExpectedException thrown = ExpectedException.none();",211 " @Test",212 " public void test() throws Exception {",213 " Path p = Paths.get(\"NOSUCH\");",214 " assertThrows(IOException.class, () -> {",215 " Files.readAllBytes(p);",216 " if (true) Files.readAllBytes(p);",217 " });",218 " }",219 "}")220 .doTest();221 }222 // https://github.com/hamcrest/JavaHamcrest/issues/27223 @Test224 public void isA_hasCauseThat() {225 testHelper226 .addInputLines(227 "in/ExceptionTest.java",228 "import static com.google.common.truth.Truth.assertThat;",229 "import java.io.IOException;",230 "import java.nio.file.*;",231 "import org.junit.Test;",232 "import org.junit.Rule;",233 "import org.hamcrest.CoreMatchers;",234 "import org.junit.rules.ExpectedException;",235 "class ExceptionTest {",236 " @Rule ExpectedException thrown = ExpectedException.none();",237 " @Test",238 " public void test() throws Exception {",239 " Path p = Paths.get(\"NOSUCH\");",240 " thrown.expect(IOException.class);",241 " thrown.expectCause(CoreMatchers.isA(IOException.class));",242 " thrown.expectCause(org.hamcrest.core.Is.isA(IOException.class));",243 " Files.readAllBytes(p);",244 " assertThat(Files.exists(p)).isFalse();",245 " }",246 "}")247 .addOutputLines(248 "out/ExceptionTest.java",249 "import static com.google.common.truth.Truth.assertThat;",250 "import static org.junit.Assert.assertThrows;",251 "",252 "import java.io.IOException;",253 "import java.nio.file.*;",254 "import org.hamcrest.CoreMatchers;",255 "import org.junit.Rule;",256 "import org.junit.Test;",257 "import org.junit.rules.ExpectedException;",258 "class ExceptionTest {",259 " @Rule ExpectedException thrown = ExpectedException.none();",260 " @Test",261 " public void test() throws Exception {",262 " Path p = Paths.get(\"NOSUCH\");",263 " IOException thrown =",264 " assertThrows(IOException.class, () -> Files.readAllBytes(p));",265 " assertThat(thrown).hasCauseThat().isInstanceOf(IOException.class);",266 " assertThat(thrown).hasCauseThat().isInstanceOf(IOException.class);",267 " assertThat(Files.exists(p)).isFalse();",268 " }",269 "}")270 .doTest();271 }272 @Test273 public void typedMatcher() {274 testHelper275 .addInputLines(276 "in/ExceptionTest.java",277 "import static com.google.common.truth.Truth.assertThat;",278 "import java.io.IOException;",279 "import java.nio.file.*;",280 "import org.junit.Test;",281 "import org.junit.Rule;",282 "import org.hamcrest.Matcher;",283 "import org.junit.rules.ExpectedException;",284 "class ExceptionTest {",285 " @Rule ExpectedException thrown = ExpectedException.none();",286 " Matcher<IOException> matcher;",287 " @Test",288 " public void test() throws Exception {",289 " Path p = Paths.get(\"NOSUCH\");",290 " thrown.expect(matcher);",291 " Files.readAllBytes(p);",292 " assertThat(Files.exists(p)).isFalse();",293 " }",294 "}")295 .addOutputLines(296 "out/ExceptionTest.java",297 "import static com.google.common.truth.Truth.assertThat;",298 "import static org.hamcrest.MatcherAssert.assertThat;",299 "import static org.junit.Assert.assertThrows;",300 "",301 "import java.io.IOException;",302 "import java.nio.file.*;",303 "import org.hamcrest.Matcher;",304 "import org.junit.Rule;",305 "import org.junit.Test;",306 "import org.junit.rules.ExpectedException;",307 "class ExceptionTest {",308 " @Rule ExpectedException thrown = ExpectedException.none();",309 " Matcher<IOException> matcher;",310 " @Test",311 " public void test() throws Exception {",312 " Path p = Paths.get(\"NOSUCH\");",313 " IOException thrown =",314 " assertThrows(IOException.class, () -> Files.readAllBytes(p));",315 " assertThat(thrown, matcher);",316 " assertThat(Files.exists(p)).isFalse();",317 " }",318 "}")319 .doTest();320 }321 @Test322 public void nothingButAsserts() {323 testHelper324 .addInputLines(325 "in/ExceptionTest.java",326 "import static com.google.common.truth.Truth.assertThat;",327 "import org.junit.Rule;",328 "import org.junit.Test;",329 "import org.junit.rules.ExpectedException;",330 "class ExceptionTest {",331 " @Rule ExpectedException thrown = ExpectedException.none();",332 " @Test",333 " public void test() throws Exception {",334 " thrown.expect(RuntimeException.class);",335 " assertThat(false).isFalse();",336 " assertThat(true).isTrue();",337 " }",338 "}")339 .addOutputLines(340 "out/ExceptionTest.java",341 "import static com.google.common.truth.Truth.assertThat;",342 "import org.junit.Rule;",343 "import org.junit.Test;",344 "import org.junit.rules.ExpectedException;",345 "class ExceptionTest {",346 " @Rule ExpectedException thrown = ExpectedException.none();",347 " @Test",348 " public void test() throws Exception {",349 " assertThat(false).isFalse();",350 " assertThat(true).isTrue();",351 " }",352 "}")353 .doTest();354 }355 @Test356 public void removeExplicitFail() {357 testHelper358 .addInputLines(359 "in/ExceptionTest.java",360 "import static com.google.common.truth.Truth.assertThat;",361 "import static org.junit.Assert.fail;",362 "import java.io.IOException;",363 "import java.nio.file.*;",364 "import org.junit.Test;",365 "import org.junit.Rule;",366 "import org.junit.rules.ExpectedException;",367 "class ExceptionTest {",368 " @Rule ExpectedException thrown = ExpectedException.none();",369 " @Test",370 " public void testThrow() throws Exception {",371 " thrown.expect(IOException.class);",372 " throw new IOException();",373 " }",374 " @Test",375 " public void one() throws Exception {",376 " Path p = Paths.get(\"NOSUCH\");",377 " thrown.expect(IOException.class);",378 " Files.readAllBytes(p);",379 " assertThat(Files.exists(p)).isFalse();",380 " fail();",381 " }",382 " @Test",383 " public void two() throws Exception {",384 " Path p = Paths.get(\"NOSUCH\");",385 " thrown.expect(IOException.class);",386 " Files.readAllBytes(p);",387 " assertThat(Files.exists(p)).isFalse();",388 " throw new AssertionError();",389 " }",390 "}")391 .addOutputLines(392 "out/ExceptionTest.java",393 "import static com.google.common.truth.Truth.assertThat;",394 "import static org.junit.Assert.assertThrows;",395 "import static org.junit.Assert.fail;",396 "",397 "import java.io.IOException;",398 "import java.nio.file.*;",399 "import org.junit.Rule;",400 "import org.junit.Test;",401 "import org.junit.rules.ExpectedException;",402 "class ExceptionTest {",403 " @Rule ExpectedException thrown = ExpectedException.none();",404 " @Test",405 " public void testThrow() throws Exception {",406 " }",407 " @Test",408 " public void one() throws Exception {",409 " Path p = Paths.get(\"NOSUCH\");",410 " assertThrows(IOException.class, () -> Files.readAllBytes(p));",411 " assertThat(Files.exists(p)).isFalse();",412 " }",413 " @Test",414 " public void two() throws Exception {",415 " Path p = Paths.get(\"NOSUCH\");",416 " assertThrows(IOException.class, () -> Files.readAllBytes(p));",417 " assertThat(Files.exists(p)).isFalse();",418 " }",419 "}")420 .doTest();421 }422 // https://github.com/google/error-prone/issues/1072423 @Test424 public void i1072() {425 testHelper426 .addInputLines(427 "in/ExceptionTest.java",428 "import org.junit.Rule;",429 "import org.junit.Test;",430 "import org.junit.rules.ExpectedException;",431 "class ExceptionTest {",432 " @Rule ExpectedException thrown = ExpectedException.none();",433 " @Test",434 " public void testThrow(Class<? extends Throwable> clazz) throws Exception {",435 " thrown.expect(clazz);",436 " clazz.toString();",437 " }",438 "}")439 .addOutputLines(440 "in/ExceptionTest.java",441 "import static org.junit.Assert.assertThrows;",442 "import org.junit.Rule;",443 "import org.junit.Test;",444 "import org.junit.rules.ExpectedException;",445 "class ExceptionTest {",446 " @Rule ExpectedException thrown = ExpectedException.none();",447 " @Test",448 " public void testThrow(Class<? extends Throwable> clazz) throws Exception {",449 " assertThrows(Throwable.class, () -> clazz.toString());",450 " }",451 "}")452 .doTest();453 }454}...
Source:JunitRuleTest.java
...3import lombok.extern.slf4j.Slf4j;4import org.apache.commons.io.FileUtils;5import org.junit.Rule;6import org.junit.Test;7import org.junit.rules.ExpectedException;8import org.junit.rules.MethodRule;9import org.junit.rules.RuleChain;10import org.junit.rules.TemporaryFolder;11import org.junit.rules.TestName;12import org.junit.rules.TestRule;13import org.junit.rules.Timeout;14import org.junit.runner.Description;15import org.junit.runner.RunWith;16import org.junit.runners.model.FrameworkMethod;17import org.junit.runners.model.Statement;18import org.springframework.boot.test.context.SpringBootTest;19import org.springframework.test.context.junit4.SpringRunner;20import java.io.File;21import java.util.concurrent.TimeUnit;22/**23 * JunitRuleTest24 *25 * @author dongdaiming(è£ä»£æ)26 * @date 2019-07-2227 * @see <a href="https://blog.csdn.net/kingmax54212008/article/details/89003076">Junit Ruleç使ç¨</a>28 */29@Slf4j30@RunWith(SpringRunner.class)31@SpringBootTest32public class JunitRuleTest {33 // TemporaryFolderå¯ç¨äºå¨æµè¯æ¶çææ件并å¨æµè¯å®åèªå¨å é¤34 @Rule35 public TemporaryFolder temporaryFolder = new TemporaryFolder(new File("/temp/junit"));36 // TestNameå¯ä»¥è·åå°å½åæµè¯æ¹æ³çå称37 @Rule38 public TestName testName = new TestName();39 // Timeoutå¯ä»¥è®¾ç½®å
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æ¶æ¶é´40 @Rule41 public Timeout timeout = Timeout.seconds(15);42 // èªå®ä¹æ¹æ³è§å-æå°æµè¯æ¹æ³åä¸èæ¶43 @Rule44 public MethodLoggingRule methodLogger = new MethodLoggingRule();45 // ExpectedExceptionå¯ä»¥å¹é
å¼å¸¸ç±»ååå¼å¸¸message46 @Rule47 public ExpectedException expectedException = ExpectedException.none();48 @Rule49 public RuleChain ruleChain = RuleChain.outerRule(new LoggingRule(3)).around(new LoggingRule(2)).around(new LoggingRule(1));50 @Test51 public void testTemporaryFolder() throws Exception {52 File file = temporaryFolder.newFile();53 log.info("file: {}", file.getAbsolutePath());54 FileUtils.writeStringToFile(file, "abc", "utf-8", true);55 log.info("read data: {}", FileUtils.readFileToString(file, "utf-8"));56 TimeUnit.SECONDS.sleep(10);57 }58 @Test59 public void testTimeout() throws InterruptedException {60 TimeUnit.SECONDS.sleep(20);61 }...
Source:ExpectedException.java
...24import org.junit.runner.Description;25import org.junit.runners.model.Statement;26import static org.hamcrest.CoreMatchers.equalTo;27/**28 * A custom variant of {@link org.junit.rules.ExpectedException} that verifies that the whole exception message29 * is identical to the expected message instead of just if the message contains the expected message.30 *31 * @author Christian Ihle32 */33public class ExpectedException implements TestRule {34 private final org.junit.rules.ExpectedException expectedException = org.junit.rules.ExpectedException.none();35 public static ExpectedException none() {36 return new ExpectedException();37 }38 @Override39 public Statement apply(final Statement base, final Description description) {40 return expectedException.apply(base, description);41 }42 /**43 * Which exception to expect.44 */45 public void expect(final Class<? extends Throwable> expectedExceptionClass) {46 expectedException.expect(expectedExceptionClass);47 }48 /**49 * The exact exception message to expect.50 */...
Source:RulesUnitTest.java
...11import org.junit.Rule;12import org.junit.Test;13import org.junit.rules.DisableOnDebug;14import org.junit.rules.ErrorCollector;15import org.junit.rules.ExpectedException;16import org.junit.rules.TemporaryFolder;17import org.junit.rules.TestName;18import org.junit.rules.Timeout;19import org.slf4j.Logger;20import org.slf4j.LoggerFactory;21public class RulesUnitTest {22 private static final Logger LOG = LoggerFactory.getLogger(RulesUnitTest.class);23 @Rule24 public TemporaryFolder tmpFolder = new TemporaryFolder();25 @Rule26 public final ExpectedException thrown = ExpectedException.none();27 @Rule28 public TestName name = new TestName();29 @Rule30 public Timeout globalTimeout = Timeout.seconds(10);31 @Rule32 public final ErrorCollector errorCollector = new ErrorCollector();33 34 @Rule35 public DisableOnDebug disableTimeout = new DisableOnDebug(Timeout.seconds(30));36 37 @Rule38 public TestMethodNameLogger testLogger = new TestMethodNameLogger();39 @Test40 public void givenTempFolderRule_whenNewFile_thenFileIsCreated() throws IOException {...
Source:CalacRuleTest.java
...8import org.junit.Before;9import org.junit.BeforeClass;10import org.junit.Rule;11import org.junit.Test;12import org.junit.rules.ExpectedException;13import org.junit.rules.TemporaryFolder;14import org.junit.rules.TestName;15import org.junit.rules.TestWatcher;16import org.junit.rules.Timeout;17import org.junit.runner.Description;18import practice.section1.Calculator;19public class CalacRuleTest {20 @BeforeClass21 public static void setUpBeforeClass() throws Exception {22 }23 @AfterClass24 public static void tearDownAfterClass() throws Exception {25 }26 @Before27 public void setUp() throws Exception {28 }29 @After30 public void tearDown() throws Exception {31 }32 @Rule33 public TemporaryFolder tempFolder = new TemporaryFolder();34 @Rule //ã¿ã¤ã ã¢ã¦ã35 public Timeout timeout = new Timeout(100000);36 @Rule //å®è¡ä¸ã®ãã¹ãã¡ã½ããåãåç
§ã§ãã37 public TestName testName = new TestName();38 @Rule //ä¾å¤åºåããããããããã39 public ExpectedException expectedException = ExpectedException.none();40 @Rule //ãã°åºå ãã¹ãã¦ã©ããã£ã¼41 public TestWatcher testWatcher = new TestWatcher () {42 @Override43 protected void starting(Description description) {44 Logger.getAnonymousLogger().info("start:"45 + description.getMethodName());46 }47 @Override48 protected void succeeded(Description description) {49 Logger.getAnonymousLogger().info("succeeded:"50 + description.getMethodName());51 }52 @Override53 protected void failed(Throwable e, Description description) {...
Source:RulesTest.java
1package junitparams;2import org.junit.Rule;3import org.junit.Test;4import org.junit.rules.ErrorCollector;5import org.junit.rules.ExpectedException;6import org.junit.rules.TemporaryFolder;7import org.junit.rules.TestName;8import org.junit.rules.TestRule;9import org.junit.rules.TestWatcher;10import org.junit.rules.Timeout;11import org.junit.runner.JUnitCore;12import org.junit.runner.Result;13import org.junit.runner.RunWith;14import static org.assertj.core.api.Assertions.*;15@RunWith(JUnitParamsRunner.class)16public class RulesTest {17 @Rule18 public TemporaryFolder folder = new TemporaryFolder();19 @Rule20 public ExpectedException exception = ExpectedException.none();21 @Rule22 public ErrorCollector errors = new ErrorCollector();23 @Rule24 public TestName testName = new TestName();25 @Rule26 public TestWatcher testWatcher = new TestWatcher() {27 };28 @Rule29 public Timeout timeout = new Timeout(0);30 @Test31 @Parameters("")32 public void shouldHandleRulesProperly(String n) {33 assertThat(testName.getMethodName()).isEqualTo("shouldHandleRulesProperly");34 }...
Source:JUnit4BuiltInTestRulesTest.java
23import static org.hamcrest.Matchers.is;4import static org.hamcrest.Matchers.isA;5import static org.junit.Assert.assertThat;6import static org.junit.rules.ExpectedException.none;78import java.io.File;9import java.io.IOException;1011import org.junit.Rule;12import org.junit.Test;13import org.junit.rules.ExpectedException;14import org.junit.rules.TemporaryFolder;1516public class JUnit4BuiltInTestRulesTest {17 /*18 * you can use this template to create expected exceptions rules fast:19 * ${staticImp:importStatic(org.junit.rules.ExpectedException.none)}20 * ${imp:import(org.junit.Rule,org.junit.rules.ExpectedException)}@Rule21 * public ExpectedException exception = none();22 */2324 @Rule25 public ExpectedException exception = none();2627 @Rule28 public TemporaryFolder folder = new TemporaryFolder(); // can be called with29 // parent folder3031 @Test32 public void comparingToExpectedInTestAnnotationWeCanValidateCauseAndMessageToo() throws Exception {33 exception.expect(RuntimeException.class);34 exception.expectCause(isA(IOException.class));35 exception.expectMessage("substring");3637 throw new IllegalArgumentException("Message containing substring", new IOException("the cause"));38 }39
...
Source:Rules.java
...4import junitparams.Parameters;5import org.junit.Rule;6import org.junit.Test;7import org.junit.rules.ErrorCollector;8import org.junit.rules.ExpectedException;9import org.junit.rules.TemporaryFolder;10import org.junit.rules.TestName;11import org.junit.rules.TestWatcher;12import org.junit.rules.Timeout;13import org.junit.runner.RunWith;14@RunWith(JUnitParamsRunner.class)15public class Rules {16 @Rule17 public TemporaryFolder folder = new TemporaryFolder();18 @Rule19 public ExpectedException exception = ExpectedException.none();20 @Rule21 public ErrorCollector errors = new ErrorCollector();22 @Rule23 public TestName testName = new TestName();24 @Rule25 public TestWatcher testWatcher = new TestWatcher() {};26 @Rule27 public Timeout timeout = new Timeout(28 0);29 @Test30 @Parameters("test")31 public void shouldHandleRulesWork(String n) {32 assertThat(testName.getMethodName()).isEqualTo("shouldHandleRulesWork");33 }...
ExpectedException
Using AI Code Generation
1import org.junit.Rule;2import org.junit.Test;3import org.junit.rules.ExpectedException;4public class ExpectedExceptionTest {5 public ExpectedException thrown = ExpectedException.none();6 public void throwsNothing() {7 }8 public void throwsNullPointerException() {9 thrown.expect(NullPointerException.class);10 throw new NullPointerException();11 }12 public void throwsNullPointerExceptionWithMessage() {13 thrown.expect(NullPointerException.class);14 thrown.expectMessage("happened");15 throw new NullPointerException("what happened?");16 }17 public void throwsNullPointerExceptionWithMessageContaining() {18 thrown.expect(NullPointerException.class);19 thrown.expectMessage("what");20 throw new NullPointerException("what happened?");21 }22}23import org.junit.Rule;24import org.junit.Test;25import org.junit.rules.ExpectedException;26public class ExpectedExceptionTest {27 public ExpectedException thrown = ExpectedException.none();28 public void throwsNothing() {29 }30 public void throwsNullPointerException() {31 thrown.expect(NullPointerException.class);32 throw new NullPointerException();33 }34 public void throwsNullPointerExceptionWithMessage() {35 thrown.expect(NullPointerException.class);36 thrown.expectMessage("happened");37 throw new NullPointerException("what happened?");38 }39 public void throwsNullPointerExceptionWithMessageContaining() {40 thrown.expect(NullPointerException.class);41 thrown.expectMessage("what");42 throw new NullPointerException("what happened?");43 }44}45void expect(Class<? extends
ExpectedException
Using AI Code Generation
1import org.junit.Test;2import org.junit.Rule;3import org.junit.rules.ExpectedException;4import java.io.File;5import java.io.FileNotFoundException;6import java.io.FileReader;7public class ExpectedExceptionTest {8 public ExpectedException thrown = ExpectedException.none();9 public void testExpectedException() throws FileNotFoundException {10 File file = new File("test.txt");11 FileReader fileReader = new FileReader(file);12 thrown.expect(FileNotFoundException.class);13 thrown.expectMessage("test.txt (No such file or directory)");14 fileReader.read();15 }16}17Expected :test.txt (No such file or directory)18Actual :test.txt (The system cannot find the file specified)19at org.junit.Assert.assertEquals(Assert.java:115)20at org.junit.Assert.assertEquals(Assert.java:144)21at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:268)22at org.junit.rules.RunRules.evaluate(RunRules.java:20)23at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)24at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)25at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)26at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)27at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)28at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)29at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)30at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)31at org.junit.runners.ParentRunner.run(ParentRunner.java:363)32at org.junit.runner.JUnitCore.run(JUnitCore.java:137)33at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)34at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)35at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)36at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
ExpectedException
Using AI Code Generation
1import org.junit.jupiter.api.Test;2import org.junit.jupiter.api.function.Executable;3import org.junit.jupiter.api.Assertions;4import org.junit.jupiter.api.BeforeEach;5import org.junit.jupiter.api.AfterEach;6public class TestClass {7 private Calculator calculator;8 public void setUp() {9 calculator = new Calculator();10 }11 public void tearDown() {12 calculator = null;13 }14 public void testAdd() {15 int sum = calculator.add(10, 50);16 assertEquals(60, sum);17 }18 public void testSubtract() {19 int difference = calculator.subtract(10, 50);20 assertEquals(-40, difference);21 }22 public void testMultiply() {23 int product = calculator.multiply(10, 50);24 assertEquals(500, product);25 }26 public void testDivide() {27 int quotient = calculator.divide(10, 50);28 assertEquals(0, quotient);29 }30 public void testDivideByZero() {31 Throwable exception = assertThrows(IllegalArgumentException.class, new Executable() {32 public void execute() throws Throwable {33 calculator.divide(10, 0);34 }35 });36 assertEquals("divide by zero", exception.getMessage());37 }38}39package com.javacodegeeks.junit;40public class Calculator {41 public int add(int a, int b) {42 return a + b;43 }44 public int subtract(int a, int b) {45 return a - b;46 }47 public int multiply(int a, int b) {48 return a * b;49 }50 public int divide(int a, int b) {51 if (b == 0) {52 throw new IllegalArgumentException("divide by zero");53 }54 return a / b;55 }56}
ExpectedException
Using AI Code Generation
1import org.junit.rules.ExpectedException;2ExpectedException thrown = ExpectedException.none();3public ExpectedException thrown = ExpectedException.none();4thrown.expect(ArithmeticException.class);5thrown.expectMessage("Divide by zero");6thrown.expectCause(isA(IllegalArgumentException.class));7assertThrows(ArithmeticException.class, () -> { 1/0; });8assertThrows(ArithmeticException.class, () -> { 1/0; },9"Divide by zero");10assertThrows(ArithmeticException.class, () -> { 1/0; },11isA(IllegalArgumentException.class));12assertThrows(ArithmeticException.class, () -> { 1/0; },13"Divide by zero");14assertThrows(ArithmeticException.class, () -> { 1/0; },15isA(IllegalArgumentException.class));
1return userRepository.findById(id)2 .flatMap(target -> userRepository.findById(id2)3 .map(User::getName)4 .flatMap(sourceName -> eventRepository.findById(id3)5 .map(Event::getName)6 .map(eventName-> createInvite(target, sourceName, eventName))))7
Source:How do you assert that a certain exception is thrown in JUnit 4 tests?
return userRepository.findById(id)
.flatMap(target -> userRepository.findById(id2)
.map(User::getName)
.flatMap(sourceName -> eventRepository.findById(id3)
.map(Event::getName)
.map(eventName-> createInvite(target, sourceName, eventName))))
1try {2 doSomething( optional1.get(), optional2.get(), optional3.get() );3} catch( NoSuchElementException e ) {4 // report, log, do nothing5}6Source:How do I assert my exception message with JUnit Test annotation?
try {
doSomething( optional1.get(), optional2.get(), optional3.get() );
} catch( NoSuchElementException e ) {
// report, log, do nothing
}
1if (maybeTarget.isPresent() && maybeSourceName.isPresent() && maybeEventName.isPresent()) {2 ...3}4Source:How do you assert that a certain exception is thrown in JUnit 4 tests?
if (maybeTarget.isPresent() && maybeSourceName.isPresent() && maybeEventName.isPresent()) {
...
}
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