javascript - 如何在 Jasmine.js 中编写场景

Question

我正在做一个项目，在这个项目中我必须用 Jasmine 测试我的 js 代码。我这样写我的测试。

describe("Function: foo() --- File: foo.js", function() {
    it("if input is integer", function () {
        var result = foo(123);
        expect(result).toBe(123);
    });

    it("If input is string", function () {
        var result = foo('String');
        expect(result).toBe('String');
    });

    it("If input is empty string", function () {
        var result = foo('');
        expect(result).toBe('');
    });

});

如代码所示，我一次又一次地重复相同的“它” block 。唯一改变的是“toBe”中的描述、函数输入和输出。我想问一下是否有一种方法可以将我的场景添加到列表/字典中并像这样在我的测试中使用它们而不使用任何 for 循环

describe("Function: foo() --- File: foo.js", function() {
    scenarios = [
        {description: "if input is integer", input: 123, output: 123},
        {description: "if input is String", input: "String", output: "String"},
        {description: "if input is empty string", input: '', output: ''},
    ]; 

    //This will run for each scenario in above list
    it(this.description, function () {
        var result = foo(this.input);
        expect(result).toBe(this.output);
    });

});

在这种情况下，有人可以帮助我吗？

Answer 1

你可以通过 using 实现你想要的:

describe("Function: foo() --- File: foo.js", function() {
var scenarios = [
        {description: "if input is integer", input: 123, output: 123},
        {description: "if input is String", input: "String", output: "String"},
        {description: "if input is empty string", input: '', output: ''},
    ];

scenarios.map(function(value) {
    it(value.description, function() {
        var result = foo(value.input);
        expect(result).toBe(value.output);
    });
});
}