如何使用Jasmine处理异步代码中抛出的错误？ [英] How to deal with thrown errors in async code with Jasmine?

问题描述

以下测试导致Jasmine（2.3.4，通过Karma在浏览器中运行）崩溃并且不运行任何后续测试

The following test causes Jasmine (2.3.4, run in browser via Karma) to crash and not run any subsequent tests

it('should report as failure and continue testing', function (done) {
  setTimeout(function () {
    throw new SyntaxError('some error');
    done();
  }, 1000);
});

我如何正确地将此测试报告为失败并继续进行后续测试？

How can I have this test correctly report itself as a failure and carry on with subsequent tests?

推荐答案

模拟时钟会给你预期的结果。
模拟时钟通常是测试超时的最佳做法。

Mocking the clock will give you the expected result. Mocking the clock in general is a best practice for testing timeouts.

describe('foo', function () {
    beforeEach(function () {
        timerCallback = jasmine.createSpy("timerCallback");
        jasmine.clock().install();
    });
    afterEach(function () {
        jasmine.clock().uninstall();
    });
    it('should report as failure and continue testing', function (done) {
        setTimeout(function () {
            throw new SyntaxError('some error');
            done();
        }, 1000);
        jasmine.clock().tick(1001);
    });
});

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