Monday, December 1, 2014

NoSuchMethodError on org.hamcrest.Matcher.describeMismatch

I found an interesting error when I have the following code being used in my unit test:

Assert.assertThat(((LoggingEvent) loggingEvent.getValue()).getLevel(), CoreMatchers.is(Level.DEBUG));

Following stacktrace could be seen:
java.lang.NoSuchMethodError: org.hamcrest.Matcher.describeMismatch(Ljava/lang/Object;Lorg/hamcrest/Description;)V 
 at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18) 
 at org.junit.Assert.assertThat(Assert.java:865) 
 at org.junit.Assert.assertThat(Assert.java:832) 
 at org.huahsin68.EmployeeImplTest.test(EmployeeImplTest.java:62) 
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
 at java.lang.reflect.Method.invoke(Method.java:622) 
 at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:68) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310) 
 at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:88) 
 at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282) 
 at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:86) 
 at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120) 
 at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:33) 
 at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45) 
 at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:118) 
 at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:101) 
 at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53) 
 at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:53) 
 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) 
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) 
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) 
 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) 

An expert told me that never use the hamcrest came from JUnit 4, I'm require to download a separate hamcrest library (it is version 1.3 as of this writing), and it must come before JUnit 4 in the build path. What he told is true.

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