复利计算—单元测试

1、手动测试：

2、代码测试：

package invest;

import static org.junit.Assert.*;
import static org.hamcrest.CoreMatchers.*;
import org.junit.Test;

public class CompundingTest {

    
    
    @Test
    public void testCompunding() {
        double F=Compunding.compunding(50000, 0.05, 10,1);
        assertThat(F, is(81444.7313388721));
    }

    @Test
    public void testSimple_interest() {
        double F=Compunding.simple_interest(50000, 0.05, 10);
        assertThat(F, is(75000.0));
    }

    @Test
    public void testCount_Deposit() {
        double P=Compunding.Deposit(50000, 0.05, 10,1);
        assertThat(P, is(30695.66267703796));
    }

    
    
    @Test
    public void testCount_invest() {
        double F=Compunding.invest(10000, 0.1, 10,1);
        assertThat(F, is(175311.67061100024));
    }
    
    @Test
    public void testCount_refunt() {
        double P1=Compunding.year_refunt(1000000,0.09, 20);
        //double P2=Compunding.month_refunt(1000000,0.09, 20);
        assertThat(P1, is(98100.0000));
        //assertThat(P2, is(7556.2500));
    }

}