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68 lines
3.0 KiB
CoffeeScript
68 lines
3.0 KiB
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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describe "_.endsWith", ->
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it "returns whether the given string ends with the given suffix", ->
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expect(_.endsWith("test.txt", ".txt")).toBeTruthy()
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expect(_.endsWith("test.txt", "txt")).toBeTruthy()
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expect(_.endsWith("test.txt", "test.txt")).toBeTruthy()
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expect(_.endsWith("test.txt", "")).toBeTruthy()
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expect(_.endsWith("test.txt", ".txt2")).toBeFalsy()
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expect(_.endsWith("test.txt", ".tx")).toBeFalsy()
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expect(_.endsWith("test.txt", "test")).toBeFalsy()
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describe "camelize(string)", ->
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it "converts `string` to camel case", ->
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expect(_.camelize("corey_dale_johnson")).toBe "coreyDaleJohnson"
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expect(_.camelize("corey-dale-johnson")).toBe "coreyDaleJohnson"
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expect(_.camelize("corey_dale-johnson")).toBe "coreyDaleJohnson"
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expect(_.camelize("coreyDaleJohnson")).toBe "coreyDaleJohnson"
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expect(_.camelize("CoreyDaleJohnson")).toBe "CoreyDaleJohnson"
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describe "dasherize(string)", ->
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it "converts `string` to use dashes", ->
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expect(_.dasherize("corey_dale_johnson")).toBe "corey-dale-johnson"
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expect(_.dasherize("coreyDaleJohnson")).toBe "corey-dale-johnson"
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expect(_.dasherize("CoreyDaleJohnson")).toBe "corey-dale-johnson"
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expect(_.dasherize("corey-dale-johnson")).toBe "corey-dale-johnson"
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describe "underscore(string)", ->
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it "converts `string` to use underscores", ->
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expect(_.underscore("corey-dale-johnson")).toBe "corey_dale_johnson"
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expect(_.underscore("coreyDaleJohnson")).toBe "corey_dale_johnson"
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expect(_.underscore("CoreyDaleJohnson")).toBe "corey_dale_johnson"
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expect(_.underscore("corey_dale_johnson")).toBe "corey_dale_johnson"
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describe "spliceWithArray(originalArray, start, length, insertedArray, chunkSize)", ->
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describe "when the inserted array is smaller than the chunk size", ->
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it "splices the array in place", ->
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array = ['a', 'b', 'c']
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_.spliceWithArray(array, 1, 1, ['v', 'w', 'x', 'y', 'z'], 100)
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expect(array).toEqual ['a', 'v', 'w', 'x', 'y', 'z', 'c']
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describe "when the inserted array is larger than the chunk size", ->
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it "splices the array in place one chunk at a time (to avoid stack overflows)", ->
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array = ['a', 'b', 'c']
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_.spliceWithArray(array, 1, 1, ['v', 'w', 'x', 'y', 'z'], 2)
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expect(array).toEqual ['a', 'v', 'w', 'x', 'y', 'z', 'c']
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