 
     it 'returns false for non-binary file extension', ->
       expect(fs.isBinaryExtension('.bz2')).toBe false
+    
+    it 'returns true for an uppercase binary file extension', ->
+      expect(fs.isBinaryExtension('.EXE')).toBe true
 
   describe ".isCompressedExtension", ->
     it 'returns true for a recognized compressed file extension', ->


    it 'returns false for non-PDF file extension', ->
      expect(fs.isPdfExtension('.bz2')).toBe false

  describe '.isReadmePath', ->
    it 'returns true for a recognized README path', ->


    it 'returns false for non-Markdown file extension', ->
      expect(fs.isMarkdownExtension('.bz2')).toBe false
    
    it 'returns true for a recognised Markdown file extension with unusual capitalisation', ->
      expect(fs.isMarkdownExtension('.MaRKdOwN')).toBe true

  describe '.isPdfExtension', ->
    it 'returns true for a recognized PDF file extension', ->
