Folding works with coffeescript

spec/app/fold-suggester-spec.coffee

@@ -5,22 +5,43 @@ Highlighter = require 'highlighter'
 describe "FoldSuggester", ->
   foldSuggester = null
 
-  beforeEach ->
-    buffer = new Buffer(require.resolve 'fixtures/sample.js')
-    highlighter = new Highlighter(buffer)
-    foldSuggester = new FoldSuggester(highlighter)
+  describe "javascript", ->
+    beforeEach ->
+      buffer = new Buffer(require.resolve 'fixtures/sample.js')
+      highlighter = new Highlighter(buffer)
+      foldSuggester = new FoldSuggester(highlighter)
 
-  describe ".isBufferRowFoldable(bufferRow)", ->
-    it "returns true only when the buffer row starts a foldable region", ->
-      expect(foldSuggester.isBufferRowFoldable(0)).toBeTruthy()
-      expect(foldSuggester.isBufferRowFoldable(1)).toBeTruthy()
-      expect(foldSuggester.isBufferRowFoldable(2)).toBeFalsy()
-      expect(foldSuggester.isBufferRowFoldable(3)).toBeFalsy()
+    describe ".isBufferRowFoldable(bufferRow)", ->
+      it "returns true only when the buffer row starts a foldable region", ->
+        expect(foldSuggester.isBufferRowFoldable(0)).toBeTruthy()
+        expect(foldSuggester.isBufferRowFoldable(1)).toBeTruthy()
+        expect(foldSuggester.isBufferRowFoldable(2)).toBeFalsy()
+        expect(foldSuggester.isBufferRowFoldable(3)).toBeFalsy()
 
-  describe ".rowRangeForFoldAtBufferRow(bufferRow)", ->
-    it "returns the start/end rows of the foldable region starting at the given row", ->
-      expect(foldSuggester.rowRangeForFoldAtBufferRow(0)).toEqual [0, 12]
-      expect(foldSuggester.rowRangeForFoldAtBufferRow(1)).toEqual [1, 9]
-      expect(foldSuggester.rowRangeForFoldAtBufferRow(2)).toBeNull()
-      expect(foldSuggester.rowRangeForFoldAtBufferRow(4)).toEqual [4, 7]
+    describe ".rowRangeForFoldAtBufferRow(bufferRow)", ->
+      it "returns the start/end rows of the foldable region starting at the given row", ->
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(0)).toEqual [0, 12]
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(1)).toEqual [1, 9]
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(2)).toBeNull()
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(4)).toEqual [4, 7]
 
+  describe "coffeescript", ->
+    beforeEach ->
+      buffer = new Buffer(require.resolve 'fixtures/sample.coffee')
+      highlighter = new Highlighter(buffer)
+      foldSuggester = new FoldSuggester(highlighter)
+
+    describe ".isBufferRowFoldable(bufferRow)", ->
+      it "returns true only when the buffer row starts a foldable region", ->
+        expect(foldSuggester.isBufferRowFoldable(0)).toBeTruthy()
+        expect(foldSuggester.isBufferRowFoldable(1)).toBeTruthy()
+        expect(foldSuggester.isBufferRowFoldable(2)).toBeFalsy()
+        expect(foldSuggester.isBufferRowFoldable(3)).toBeFalsy()
+        expect(foldSuggester.isBufferRowFoldable(19)).toBeTruthy()
+
+    describe ".rowRangeForFoldAtBufferRow(bufferRow)", ->
+      it "returns the start/end rows of the foldable region starting at the given row", ->
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(0)).toEqual [0, 20]
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(1)).toEqual [1, 17]
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(2)).toBeNull()
+        expect(foldSuggester.rowRangeForFoldAtBufferRow(19)).toEqual [19, 20]

spec/fixtures/sample.coffee

@@ -0,0 +1,23 @@
+class quicksort
+  sort: (items) ->
+    return items if items.length <= 1
+
+    pivot = items.shift()
+    left = []
+    right = []
+
+    # Comment in the middle
+
+    while items.length > 0
+      current = items.shift()
+      if current < pivot
+        left.push(current)
+      else
+        right.push(current);
+
+    sort(left).concat(pivot).concat(sort(right))
+
+  noop: ->
+    # just a noop
+
+exports.modules = quicksort

src/app/ace-fold-adaptor.coffee

@@ -8,6 +8,9 @@ class AceFoldAdaptor
   getLine: (bufferRow) ->
     @buffer.lineForRow(bufferRow)
 
+  getLength: ->
+    @buffer.numLines()
+
   $findClosingBracket: (bracketType, bufferPosition) ->
     @highlighter.findClosingBracket([bufferPosition.row, bufferPosition.column - 1])