lab1--ideal + junit

一、安装junit、hamcrest、eclemma

  笔者用的是ideal，file --> project structure 

左边侧栏选择libraries，左第二侧栏选择“+”（java），依次把需要的junit,hamcrest的jar包和eclemma解压后的文件包添加

二、编写判断三角形形状的代码

src下再建一个package,里面写判断三角形形状的class，目录结构如下：

判断的代码：

public class Triangle {
    public  static String Shape(int a, int b,int c) {
        String shape = "";
        if ((a + b <= c) || (a + c <= b) || (b + c <= a) || (a <= 0) || (b <= 0) || (c <= 0)) {
            shape = "非三角形";
        }
        else if ((a == b) && (b == c)) {
                shape = "等边三角形";
        }
        else if (((a == b) && (b != c)) || ((b == c) && (a != b)) || ((a == c) && (c != a))) {
                    shape = "等腰三角形";
        }
        else {
                    shape = "任意三角形";
        }
        return shape;
    }
}

　　三、生成测试用例

新建一个test的文件夹存放测试用例：file --> new --> directory

public class Triangle {
}

　　选中要生成测试的类Triangle,使用快捷键option+return，选择create test ，在test文件夹下会自动生成测试用例文件

四、设计测试用例并执行

public class TriangleTest {

    @Before
    public void setUp() throws Exception {

    }

    @After
    public void tearDown() throws Exception {

    }

    @Test
    public void testShape1() throws Exception {
        assertEquals((String)"非三角形",Triangle.Shape(2,2,4));
    }

    @Test
    public void testShape2() throws Exception {
        assertEquals((String)"非三角形",Triangle.Shape(2,2,5));
    }

    @Test
    public void testShape3() throws Exception {
        assertEquals((String)"非三角形",Triangle.Shape(-2,2,5));
    }

    @Test
    public void testShape4() throws Exception {
        assertEquals((String)"非三角形",Triangle.Shape(0,2,5));
    }

    @Test
    public void testShape5() throws Exception {
        assertEquals((String)"等边三角形",Triangle.Shape(2,2,2));
    }

    @Test
    public void testShape6() throws Exception {
        assertEquals((String)"等腰三角形",Triangle.Shape(2,2,3));
    }

    @Test
    public void testShape7() throws Exception {
        assertEquals((String)"任意三角形",Triangle.Shape(2,3,4));
    }

}

　　五、执行结果