错误1：

 java.lang.Exception: Test class should have exactly one public zero-argument constructor

     at org.junit.runners.BlockJUnit4ClassRunner.validateZeroArgConstructor(BlockJUnit4ClassRunner.java:171)

     at org.junit.runners.BlockJUnit4ClassRunner.validateConstructor(BlockJUnit4ClassRunner.java:148)

     at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:127)

     at org.junit.runners.ParentRunner.validate(ParentRunner.java:416)

     at org.junit.runners.ParentRunner.<init>(ParentRunner.java:84)

     at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)

     at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)

     at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)

     at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)

     at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)

     at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)

     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)

     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)

     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)

     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)

     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)

解决：
测试类必须有一个无参数的public构造函数

错误2：

 java.lang.IllegalArgumentException: Test class can only have one constructor

     at org.junit.runners.model.TestClass.<init>(TestClass.java:48)

     at org.junit.runners.ParentRunner.createTestClass(ParentRunner.java:88)

     at org.junit.runners.ParentRunner.<init>(ParentRunner.java:83)

     at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)

     at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)

     at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)

     at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)

     at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)

     at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)

     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)

     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)

     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)

     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)

     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)

解决：

未解决！！！

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