TestForGit

public class Colculter {
    public double sum(double a,double b){
        return a+b;
    }
    public double substract(double a,double b){
        return a-b;
    }
    public double divide(double a,double b){
        return a/b;
    }
    public double aulitply(double a,double b){
        return a*b;
    }
}

public class ColculterTest {
    private Colculter mColculter;
    @Before
    public void setUp() throws Exception {
        mColculter = new Colculter();

    }
    @After
    public void tearDown() throws Exception{

    }

    @Test
    public void sum() throws Exception {
        assertEquals(8d,mColculter.sum(3d,5d),0);

    }

    @Test
    public void substract() throws Exception {
        assertEquals(1d,mColculter.substract(5d,4d),0);

    }

    @Test
    public void divide() throws Exception {
        assertEquals(4d,mColculter.divide(20d,5d),0);

    }