setup integration test

node_modules/bottleneck/src/DLList.coffee

@@ -0,0 +1,38 @@
+class DLList
+  constructor: (@incr, @decr) ->
+    @_first = null
+    @_last = null
+    @length = 0
+  push: (value) ->
+    @length++
+    @incr?()
+    node = { value, prev: @_last, next: null }
+    if @_last?
+      @_last.next = node
+      @_last = node
+    else @_first = @_last = node
+    undefined
+  shift: () ->
+    if not @_first? then return
+    else
+      @length--
+      @decr?()
+    value = @_first.value
+    if (@_first = @_first.next)?
+      @_first.prev = null
+    else
+      @_last = null
+    value
+  first: () -> if @_first? then @_first.value
+  getArray: () ->
+    node = @_first
+    while node? then (ref = node; node = node.next; ref.value)
+  forEachShift: (cb) ->
+    node = @shift()
+    while node? then (cb node; node = @shift())
+    undefined
+  debug: () ->
+    node = @_first
+    while node? then (ref = node; node = node.next; { value: ref.value, prev: ref.prev?.value, next: ref.next?.value })
+
+module.exports = DLList