Fix error parsing in FrontMatter

Fix #136

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.7.5
+
+* Fix handling frontMatter parsing ([#136](https://github.com/zhuochun/md-writer/issues/136))
+
 ## 2.7.4
 
 * Add Critic-Markup support ([#221](https://github.com/zhuochun/md-writer/issues/221))

lib/helpers/front-matter.coffee

@@ -25,8 +25,14 @@ class FrontMatter
     @_findFrontMatter (match) =>
       try
         @content = yaml.safeLoad(match.match[1].trim()) || {}
-        @leadingFence = match.matchText.startsWith("---")
-        @isEmpty = false
+
+        if typeof @content != "object" # error parsing #136
+          @content = {}
+          @leadingFence = true
+          @isEmpty = true
+        else
+          @leadingFence = match.matchText.startsWith("---")
+          @isEmpty = false
       catch error
         @parseError = error
         @content = {}

spec/helpers/front-matter-spec.coffee

@@ -38,6 +38,22 @@ describe "FrontMatter", ->
       expect(frontMatter.isEmpty).toBe(true)
       expect(frontMatter.content).toEqual({})
 
+    it "is empty when editor has weird front matter", ->
+      editor.setText """
+        ---
+        1. [VLC media player](https://www.videolan.org/vlc/index.html) - VideoLAN, a project and a non-profit organization
+        2. [Inkscape](https://inkscape.org/en/) - free and open-source vector graphics editor
+        3. [GIMP](https://www.gimp.org/) -  GNU Image Manipulation Program) is a free and open-source raster graphics editor'
+        ---
+
+        some random text 1
+        some random text 2
+      """
+
+      frontMatter = new FrontMatter(editor)
+      expect(frontMatter.isEmpty).toBe(true)
+      expect(frontMatter.content).toEqual({})
+
   describe "editor with jekyll front matter", ->
     [editor, frontMatter] = []