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The name of the class should indicate that it’s a test—for example, have the class name start with Test. |
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We extend from JUnit’s TestCase class. |
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The instance variables set up in the setUp() method represent the common fixture for the test methods. |
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We can prepare a known state for the test by overriding the protected setUp() method. |
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If using Java 5, it’s good to add the @Override annotation to setUp() and tearDown() to avoid typos. |
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We can clean up after our test by overriding the protected tearDown() method. |
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All public void methods starting with test are considered test cases by the JUnit 3.8 TestRunner. |
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Test methods can declare any exceptions—JUnit catches them. |
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We can declare any number of helper methods as long as they don’t look like test methods. |
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Extending TestCase gives us, among other things, a bunch of assertion methods such as assertEquals(). |
