• このエントリーをはてなブックマークに追加

hamcrest関係のエラーでハマったので、メモ。

java.lang.NoSuchMethodError: org.hamcrest.Matcher.describeMismatch

エラーメッセージ

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 test.endtoend.auctionsniper.FakeAuctionServer$SingleMessageListener.receivesAMessage(FakeAuctionServer.java:71)
     at test.endtoend.auctionsniper.FakeAuctionServer.hasRecievedJoinRequestFromSniper(FakeAuctionServer.java:51)
     at test.endtoend.auctionsniper.AuctionSniperEndToEndTest.sniperJoinnAuctionUntilAuctionCloses(AuctionSniperEndToEndTest.java:14)
     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:601)
     at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
     at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
     at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
     at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
     at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
     at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
     at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
     at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
     at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
     at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
     at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
     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)

原因

junit.jarには、org.hamcrest.Matcher(aとする)ライブラリが一緒に入っている。
外部のhamcrest(bとする)を入れていると、JUNITはaではなく、bを参照しようとして、エラーする。

解決方法

junit.jar ではなく、 junit-dev-.jarを使う。
junit-dev.jarはhamcrestを含んでいないJUNITライブラリ。
こっちを利用することで、junitとhamcrestの依存関係は解消する。

参考

NoClassDefFoundError: org/hamcrest/MatcherAssert

エラーメッセージ

java.lang.NoClassDefFoundError: org/hamcrest/MatcherAssert
     at org.junit.Assert.assertThat(Assert.java:865)
     at test.endtoend.auctionsniper.FakeAuctionServer$SingleMessageListener.receivesAMessage(FakeAuctionServer.java:71)
     at test.endtoend.auctionsniper.FakeAuctionServer.hasRecievedJoinRequestFromSniper(FakeAuctionServer.java:51)
     at test.endtoend.auctionsniper.AuctionSniperEndToEndTest.sniperJoinnAuctionUntilAuctionCloses(AuctionSniperEndToEndTest.java:14)
     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:601)
     at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
     at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
     at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
     at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
     at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
     at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
     at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
     at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
     at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
     at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
     at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
     at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
     at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
     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)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.MatcherAssert
     at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
     … 28 more

問題

hamcrestのバージョンが古いのが原因。

解決

hamcreat を1.1から1.3にしたら解決。

参考