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

        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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        // inner classes were bad...
        assertEquals("testCaseToString(junit.tests.framework.TestCaseTest)", toString());
    }


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

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        verifyError(fails);
        assertTrue(fails.fTornDown);
    }


    public void testSetupFails() {
        TestCase fails = new TestCase("success") {
            @Override
            protected void setUp() {
                throw new Error();
            }

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        };
        verifyError(fails);
    }


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

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        };
        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();
            }

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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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    public void addFailureDelegatesToNotifier() {
        Result result = new Result();
        RunListener listener = result.createListener();
        RunNotifier notifier = new RunNotifier();
        notifier.addFirstListener(listener);
        TestCase testCase = new TestCase() {
        };
        TestListener adaptingListener = new JUnit38ClassRunner(testCase)
                .createAdaptingListener(notifier);
        adaptingListener.addFailure(testCase, new AssertionFailedError());
        assertEquals(1, result.getFailureCount());

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    public void testOneTest() {
        String expected = expected(new String[]{".", "Time: 0", "", "OK (1 test)", ""});
        TestSuite suite = new TestSuite();
        suite.addTest(new TestCase() {
            @Override
            public void runTest() {
            }
        });
        runner.doRun(suite);

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