Unit Test

• what kinds of tests do you know?
  • unit test (dev, component or function level, white box) *
  • integration test (see if your code can be integrated into other codes)
  • regression test (if new code breaks existing logic) *
  • smoke test
  • end-2-end test, feature test (external behavior test, black test) *
  • black/white box (white box is when you know how the functions are implemented inside)
  • performance test *
• agile 快速迭代 ci (continuous integration) + regression test

JUnit Test

• Annotations
• Assertions
  • assertSame(Object a, Object b) same references

public class CalTest {
    @BeforeClass
    public static void setupAll() {
    }

    @AfterClass
    public static void teardownAll() {
    }

    @Before
    public void setUp() {
    }

    @After
    public void tearDown() {
    }

    @Test
    public void test() {
        fail("Not yet implemented");
    }

    @Test(expected=NullPointerException.class)
    public void test2() {
        Cal c = new Cal();
        assertEquals(c.getMedian(new int{1,2,3}), 2);
    }
}