selenium在firefox下运行junit4报错java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkAr

更新下selenium-server-standalone.jar，guava.jar，selenium-java到最新版本

java.lang.NoSuchMethodError: com.google.common.base.Preconditions.checkArgument(ZLjava/lang/String;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Vat org.openqa.selenium.firefox.Preferences.checkPreference(Preferences.java:225)at org.openqa.selenium.firefox.Preferences.setPreference(Preferences.java:155)at org.openqa.selenium.firefox.Preferences.setPreference(Preferences.java:126)at org.openqa.selenium.firefox.Preferences.readDefaultPreferences(Preferences.java:105)at org.openqa.selenium.firefox.Preferences.<init>(Preferences.java:66)at org.openqa.selenium.firefox.FirefoxProfile.<init>(FirefoxProfile.java:81)at org.openqa.selenium.firefox.FirefoxProfile.<init>(FirefoxProfile.java:71)at org.openqa.selenium.firefox.FirefoxProfile.<init>(FirefoxProfile.java:60)at com.test.qq.Slotdownload.setUp(Slotdownload.java:62)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)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.RunBefores.evaluate(RunBefores.java:24)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:86)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)