Question

isTriangle函数检查三角形的边并确定三角形是斜角，等边还是等腰。

编写函数后，我需要通过Jasmine和Javascript进行单元测试。

代码：

function isTriangleTranslate(side1, side2, side3) {
    if (side1 === side2 && side3 === side2 && side2 === side1) {
        return ("It's an equilateral!");
    }
    if (side2 === side3 && side1 != side2 && side1 != side3 || side1 === side3 && side2 != side1 && side2 != side3 || side1 === side2 && side2 != side3) {
        return ("It's an isosceles!");
    }
    else {
        return ("It's a scalene!");
    }
}

规格：

describe("isTriangle", function(){

  it("is an equilateral trinagle with three equal sides", function(){
    expect(isTriangleTranslate()).toEqual("It's an equilateral!");

  })

});

describe("isTriangle", function(){

  it("is an isosceles triangle with two equal sides", function(){
    expect(isTriangleTranslate()).toEqual("It's an isosceles!");

  })

});

describe("isTriangle", function(){

  it("is a scalene triangle with no equal sides", function(){
    expect(isTriangleTranslate()).toEqual("It's a scalene!");

  })

});

错误是，斜角肌和等腰肌不等于“这是等边的”

我不希望它那样做。我要它确定我的side1，side2和side3是否相等，然后等于字符串“这是等边的！”

如果我的side1，side2和side3的两个边相等，则等于字符串“这是一个等腰！”

否则，三角形是“这是一个斜角！”

您将如何在Jasmine的单元测试中编写此代码？

Answer 1

首先，我将根据一般原则简化该功能：

function isTriangleTranslate(a, b, c) {
   if (a === b && b === c && c === a) {
      return ("It's an equilateral!")
   } 
   else if (a+b == a+c || b+a == b+c || c+a == c+b) {
        return ("It's an isosceles!");
   } else {
        return ("It's a scalene!");
   }
}

然后，我将值传递给测试。您只是在调用不带参数的方法。

describe("isTriangle", function(){

  it("is an equilateral triangle with three equal sides", function(){
    expect(isTriangleTranslate(4,4,4)).toEqual("It's an equilateral!");
  })

});

describe("isTriangle", function(){

  it("is an isosceles triangle with two equal sides", function(){
    expect(isTriangleTranslate(4,4,5)).toEqual("It's an isosceles!");
  })

});

describe("isTriangle", function(){

  it("is a scalene triangle with no equal sides", function(){
    expect(isTriangleTranslate(4,5,6)).toEqual("It's a scalene!");
  })

});

单元测试：茉莉花

1 个答案: