茉莉花未能在async.waterfall块内调用函数
我有一个node.js应用程序，使用asynchronous实用程序来打破嵌套的callback。
而且我试图在我的茉莉花规格中窥探async.waterfall封装的函数，但总是失败。
下面的代码可以重现错误：
async = require 'async' app = hi: -> fn = -> # app.hi() # works async.waterfall [ (cb) -> app.hi() # doesn't work cb null ], (err) -> describe 'jasmine', -> beforeEach -> spyOn app, 'hi' it 'test async.waterfall', -> spyOn app, 'hi' fn() expect(app.hi).toHaveBeenCalled() 失败消息：
Failures: 1) jasmine test async.waterfall Message: Expected spy hi to have been called. Stacktrace: Error: Expected spy hi to have been called. at new jasmine.ExpectationResult (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:114:32) at null.toHaveBeenCalled (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:1235:29) at null.<anonymous> (/Volumes/ws/prj/litb/crm/tests/job/indexSpecs.coffee:51:29) at jasmine.Block.execute (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:1064:17) at jasmine.Queue.next_ (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2096:31) at jasmine.Queue.start (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2049:8) at jasmine.Spec.execute (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2376:14) at jasmine.Queue.next_ (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2096:31) at jasmine.Queue.start (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2049:8) at jasmine.Suite.execute (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2521:14) at jasmine.Queue.next_ (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2096:31) at onComplete (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2092:18) at jasmine.Suite.finish (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2478:5) at null.onComplete (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2522:10) at jasmine.Queue.next_ (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2106:14) at onComplete (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2092:18) at jasmine.Spec.finish (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2350:5) at null.onComplete (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2377:10) at jasmine.Queue.next_ (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2106:14) at null._onTimeout (/Volumes/ws/prj/litb/crm/node_modules/jasmine-node/lib/jasmine-node/jasmine-1.3.1.js:2086:18) at Timer.listOnTimeout [as ontimeout] (timers.js:110:15)
但它通过，如果函数调用（这应该是一个间谍）是在瀑布块外。
我想知道我的代码是否有问题？ 或者不支持茉莉花或asynchronous？
由于waterfall是asynchronous的，规范正在完成而没有意识到它应该等待瀑布发生。 你可以使用茉莉花的asynchronous支持来解决这个问题，虽然茉莉花的asynchronous的东西被认为不是那么好。
it 'test async.waterfall', -> spy = spyOn app, 'hi' runs -> fn() waitsFor -> spy.callCount > 0 runs -> # kind of redundant at this point, # the waitsFor already asserted this expect(app.hi).toHaveBeenCalled()
另一种方法是使setTimeout和/或`setInterval在您的testing环境中不是asynchronous的。 这也有缺点：
beforeEach -> # I'm sure jasmine's spys can handle this too # I use sinon myself, not as familiar with jasmine's spies @realSetTimeout = window.setTimeout window.setTimeout = (fn, delay) -> fn() afterEach -> window.setTimeout = @realSetTimeout it 'test async.waterfall', -> # as you have it now