javascript - Jasmine 规范运行者 : Stack Trace from failed test?

Question

我正在使用 src 文件夹中的 moment.js 做一个 Jasmine-standalone-demo。

describe("moment.js -> diff", function() {
    var start, end;
    it("leap year", function() {
        start = moment([2012, 1, 26]);
        end = moment([2012, 2, 4]);
        expect( end.diff(start, "days") ).toEqual(7);
    });
    it("winter-/summertime", function() {
        start = moment("2012-10-28T02:00:00+02:00");
        end = moment("2012-10-28T03:00:00+01:00");
        expect( end.diff(start, "hours") ).toEqual(0);
    });
});

第二个测试预计会失败，它确实失败了(diff 返回 1)，但 Jasmine 给出了一个堆栈跟踪，这对我来说非常无用，除非 Jasmine 本身有错误:

Error: Expected 1 to equal 0.
    at new jasmine.ExpectationResult (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:114:32)
    at null.toEqual (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:1235:29)
    at null.<anonymous> (http://localhost/jasmine/spec/MomentSpec.js:11:38)
    at jasmine.Block.execute (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:1064:17)
    at jasmine.Queue.next_ (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:2096:31)
    at jasmine.Queue.start (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:2049:8)
    at jasmine.Spec.execute (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:2376:14)
    at jasmine.Queue.next_ (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:2096:31)
    at onComplete (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:2092:18)
    at jasmine.Spec.finish (http://localhost/jasmine/lib/jasmine-1.3.1/jasmine.js:2350:5)

有人可以请教单元测试新手吗？也许我做错了什么。

Answer 1

如果 it() 中有多个 expect()，堆栈跟踪会告诉您哪个 expect() 函数失败> 阻止。

正如@zbynour 提到的，您必须转到 MomentSpec.js 中的第 11 行，第 38 个字符才能找到答案!