如何使用Jasmine处理异步代码中抛出的错误？

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?

答

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);
    });
});

如何使用Jasmine处理异步代码中抛出的错误？

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