TextForfogit

caculator
package com.example.liuy.textforforgit;

/**
 * Created by liuY on 2017/3/13.
 */

public class caculator {
    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;
    }
        }
caculatorText

package com.example.liuy.textforforgit;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.*;

/**
 * Created by liuY on 2017/3/13.
 */
public class caculatorTest {


    private caculator mcaculator;
    @Before
    public void setUp() throws Exception {
        mcaculator=new caculator();
    }
    @After
    public void tearDown() throws Exception {

    }

    @Test
    public void sum() throws Exception {
        assertEquals(20d,mcaculator.sum(10d,10d),0);


    }

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

    }

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

    }

    @Test
    public void multiply() throws Exception {
        assertEquals(100d,mcaculator.multiply(50d,2d),0);

    }



}