Error 1:
1 java.lang.Exception: Test class should have exactly one public zero-argument constructor
2 at org.junit.runners.BlockJUnit4ClassRunner.validateZeroArgConstructor(BlockJUnit4ClassRunner.java:171)
3 at org.junit.runners.BlockJUnit4ClassRunner.validateConstructor(BlockJUnit4ClassRunner.java:148)
4 at org.junit.runners.BlockJUnit4ClassRunner.collectInitializationErrors(BlockJUnit4ClassRunner.java:127)
5 at org.junit.runners.ParentRunner.validate(ParentRunner.java:416)
6 at org.junit.runners.ParentRunner.<init>(ParentRunner.java:84)
7 at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)
8 at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)
9 at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
10 at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
11 at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
12 at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
13 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
14 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
15 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
16 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
17 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
18 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
19 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Solve:
The test class must have a public constructor with no parameters
Error 2:
1 java.lang.IllegalArgumentException: Test class can only have one constructor
2 at org.junit.runners.model.TestClass.<init>(TestClass.java:48)
3 at org.junit.runners.ParentRunner.createTestClass(ParentRunner.java:88)
4 at org.junit.runners.ParentRunner.<init>(ParentRunner.java:83)
5 at org.junit.runners.BlockJUnit4ClassRunner.<init>(BlockJUnit4ClassRunner.java:65)
6 at org.junit.internal.builders.JUnit4Builder.runnerForClass(JUnit4Builder.java:10)
7 at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
8 at org.junit.internal.builders.AllDefaultPossibilitiesBuilder.runnerForClass(AllDefaultPossibilitiesBuilder.java:26)
9 at org.junit.runners.model.RunnerBuilder.safeRunnerForClass(RunnerBuilder.java:59)
10 at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:33)
11 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createUnfilteredTest(JUnit4TestLoader.java:84)
12 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:70)
13 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:43)
14 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
15 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
16 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
17 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Solve:
Not resolved!!!
"Junit Error" Test class should has exactly one public zero-argument constructor and test class can only has one constructor