加减乘除的测试用例

加减乘除的算法

public class jcsf {
    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 multiply(double a,double b)
    {
        return a*b;
    }
}



加减乘除的测试用例

public class jcsfTest {
    private jcsf jcsf;
    @Before
    public void setUp() throws Exception {
        jcsf = new jcsf();

    }

    @Test
    public void sum() throws Exception {
            assertEquals(7d,jcsf.sum(3d,4d),0);
        }


    @Test
    public void substract() throws Exception {
        assertEquals(3d,jcsf.substract(7d,4d),0);


    }

    @Test
    public void divide() throws Exception {
        assertEquals(2d,jcsf.divide(4d,2d),0);


    }

    @Test
    public void multiply() throws Exception {
        assertEquals(4d,jcsf.multiply(2d,2d),0);


    }

}