Examples of junit.framework.TestCase

junit.framework.TestCase
A test case defines the fixture to run multiple tests. To define a test case
1. implement a subclass of TestCase
2. define instance variables that store the state of the fixture
3. initialize the fixture state by overriding {@link #setUp()}
4. clean-up after a test by overriding {@link #tearDown()}.
Each test runs in its own fixture so there can be no side effects among test runs. Here is an example:
```
 public class MathTest extends TestCase { protected double fValue1; protected double fValue2; protected void setUp() { fValue1= 2.0; fValue2= 3.0; } } 
```
For each test implement a method which interacts with the fixture. Verify the expected results with assertions specified by calling {@link junit.framework.Assert#assertTrue(String,boolean)} with a boolean.
```
 public void testAdd() { double result= fValue1 + fValue2; assertTrue(result == 5.0); } 
```
Once the methods are defined you can run them. The framework supports both a static type safe and more dynamic way to run a test. In the static way you override the runTest method and define the method to be invoked. A convenient way to do so is with an anonymous inner class.
```
 TestCase test= new MathTest("add") { public void runTest() { testAdd(); } }; test.run(); 
```
The dynamic way uses reflection to implement {@link #runTest()}. It dynamically finds and invokes a method. In this case the name of the test case has to correspond to the test method to be run.
```
 TestCase test= new MathTest("testAdd"); test.run(); 
```
The tests to be run can be collected into a TestSuite. JUnit provides different test runners which can run a test suite and collect the results. A test runner either expects a static method suite as the entry point to get a test to run or it will extract the suite automatically.
```
 public static Test suite() { suite.addTest(new MathTest("testAdd")); suite.addTest(new MathTest("testDivideByZero")); return suite; } 
```
@see TestResult @see TestSuite

      }
    };
    verifySuccess(success);
  }
  public void testFailure() {
    TestCase failure= new TestCase("failure") {
      @Override
      protected void runTest() {
        fail();
      }
    };

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    verifyError(fails);
    assertTrue(fails.fTornDown);
  }
  
  public void testTearDownFails() {
    TestCase fails= new TestCase("success") {
      @Override
      protected void tearDown() {
        throw new Error();
      }
      @Override

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    assertEquals("running", failure.thrownException().getMessage());
  }
  
  public void testErrorTearingDownDoesntMaskErrorRunning() {
    final Exception running= new Exception("Running");
    TestCase t= new TestCase() {
      @Override
      protected void runTest() throws Throwable {
        throw running;
      }
      @Override
      protected void tearDown() throws Exception {
        throw new Error("Tearing down");
      }
    };
    try {
      t.runBare();
    } catch (Throwable thrown) {
      assertSame(running, thrown);
    }
  }

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    assertTrue(result.failureCount() == 0);
    assertTrue(result.errorCount() == 0);
  }
  
  public void testNamelessTestCase() {
    TestCase t= new TestCase() {};
    TestResult result = t.run();
    assertEquals(1, result.failureCount());
  }

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  }
  
  private DoubleTestCase fTest;
  
  public TestImplementorTest() {
    TestCase testCase= new TestCase() {
      @Override
      public void runTest() {
      }
    };
    fTest= new DoubleTestCase(testCase);

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    protected void tearDown() {
      fTornDown= true;
    }
  }
  public void testRunningErrorInTestSetup() {
    TestCase test= new TestCase("failure") {
      @Override
      public void runTest() {
        fail();
      }
    };

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    TestResult result= new TestResult();
    wrapper.run(result);
    assertTrue(!result.wasSuccessful());
  }
  public void testRunningErrorsInTestSetup() {
    TestCase failure= new TestCase("failure") {
      @Override
      public void runTest() {
        fail();
      }
    };


    TestCase error= new TestCase("error") {
      @Override
      public void runTest() {
        throw new Error();
      }
    };

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    if (!(test instanceof TestCase)) {
      showInfo("Could not reload "+ test.toString());
      return;
    }
    Test reloadedTest= null;
    TestCase rerunTest= (TestCase)test;
    try {
      Class reloadedTestClass= getLoader().reload(test.getClass()); 
      reloadedTest= TestSuite.createTest(reloadedTestClass, rerunTest.getName());
    } catch(Exception e) {
      showInfo("Could not reload "+ test.toString());
      return;
    }
    TestResult result= new TestResult();

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    if (!(test instanceof TestCase)) {
      showInfo("Could not reload "+ test.toString());
      return;
    }
    Test reloadedTest= null;
    TestCase rerunTest= (TestCase)test;


    try {
      Class reloadedTestClass= getLoader().reload(test.getClass()); 
      reloadedTest= TestSuite.createTest(reloadedTestClass, rerunTest.getName());
    } catch(Exception e) {
      showInfo("Could not reload "+ test.toString());
      return;
    }
    TestResult result= new TestResult();

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        getWriter().println("Errors here");
      }
    };
    runner.setPrinter(printer);
    TestSuite suite= new TestSuite();
    suite.addTest(new TestCase() {
      @Override
      public void runTest() throws Exception {
        throw new Exception();
      }
    });

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