2015-01-21 58 views
5

使用集成的QUnit测试framweork我需要测试是否访问路由会导致抛出错误。在Ember.js中引发错误的测试

路线中有一个把手助手,在某些情况下应该抛出一个错误(失败断言)。我该如何测试这个错误是否被抛出?

这是我走到这一步:

test('throws, if the SVG is missing', function() { 
    throws(visit('/missing'), Error, "has thrown an Error"); 
}); 

但它不工作,因为错误没有被抓到throws(...)和泡沫到测试框架,这标志着本次测试为失败。

这是测试输出:

Died on test #1  at http://localhost:7357/assets/dummy.js:304:5 
    at requireModule (http://localhost:7357/assets/vendor.js:77:29) 
    at http://localhost:7357/assets/test-loader.js:14:29: Assertion Failed: No SVG found for this/svg/is/missing 
Source:  
Error: Assertion Failed: No SVG found for this/svg/is/missing 
    at new Error (native) 
    at Error.EmberError (http://localhost:7357/assets/vendor.js:27463:23) 
    at Object.Ember.assert (http://localhost:7357/assets/vendor.js:17077:15) 
    at inlineSvg (http://localhost:7357/assets/dummy.js:94:13) 
    at Object.bindView.normalizedValue (http://localhost:7357/assets/vendor.js:20498:21) 
    at Object.SimpleHandlebarsView.render (http://localhost:7357/assets/vendor.js:23450:26) 
    at EmberRenderer_createElement [as createElement] (http://localhost:7357/assets/vendor.js:52738:16) 
    at EmberRenderer.Renderer_renderTree [as renderTree] (http://localhost:7357/assets/vendor.js:23840:24) 
    at EmberRenderer.<anonymous> (http://localhost:7357/assets/vendor.js:23917:16) 
    at DeferredActionQueues.invoke (http://localhost:7357/assets/vendor.js:13891:18) 

由于visit('/missing')回报的承诺,人们会认为使用.then(success, error)会的工作,但事实并非如此。

回答

10

我来到了这个问题,在寻找如何测试一个预期的错误,当一个组件呈现。测试预期的错误说

throw new Error('I am an error'); 

从您的组件。然后你的测试可以是这样的:

test('my-component should throw an error', function(assert) { 
    assert.expect(1); 

    assert.throws(() => { 
    this.render(hbs`{{my-component myVariable="XYZ"}}`); 
    }, new Error('I am an error'), 'Expect an error with this message'); 
}); 
+0

截至Ember 2.11,断言抛出似乎不再是一件事情。 https://github.com/emberjs/ember.js/pull/14898 – snewcomer 2017-04-09 01:44:05

1

http://api.qunitjs.com/throws/所述,您应该将回调传递给throws而不是调用该函数。

所以:

test('throws, if the SVG is missing', function() { 
    throws(function() {visit('/missing')}, Error, "has thrown an Error"); 
});