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23 lines
721 B
CoffeeScript
23 lines
721 B
CoffeeScript
_ = require 'underscore'
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describe "underscore extensions", ->
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describe "_.adviseBefore", ->
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[object, calls] = []
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beforeEach ->
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calls = []
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object = {
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method: (args...) ->
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calls.push(["original", this, args])
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}
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it "calls the given function before the advised method", ->
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_.adviseBefore object, 'method', (args...) -> calls.push(["advice", this, args])
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object.method(1, 2, 3)
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expect(calls).toEqual [['advice', object, [1, 2, 3]], ['original', object, [1, 2, 3]]]
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it "cancels the original method's invocation if the advice returns true", ->
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_.adviseBefore object, 'method', -> false
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object.method(1, 2, 3)
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expect(calls).toEqual []
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