Merge pull request #2087 from pchaigno/case-sensitivity

Detection by extension made case-insensitive

test/test_pedantic.rb

@@ -12,7 +12,7 @@ class TestPedantic < Minitest::Test
   def test_extensions_are_sorted
     LANGUAGES.each do |name, language|
       extensions = language['extensions']
-      assert_sorted extensions[1..-1] if extensions && extensions.size > 1
+      assert_sorted extensions[1..-1].map(&:downcase) if extensions && extensions.size > 1
     end
   end
 

test/test_samples.rb

@@ -43,7 +43,7 @@ class TestSamples < Minitest::Test
       if extnames = Samples.cache['extnames'][name]
         extnames.each do |extname|
           next if extname == '.script!'
-          assert options['extensions'].index { |x| x.end_with? extname }, "#{name} has a sample with extension (#{extname}) that isn't explicitly defined in languages.yml"
+          assert options['extensions'].index { |x| x.downcase.end_with? extname.downcase }, "#{name} has a sample with extension (#{extname.downcase}) that isn't explicitly defined in languages.yml"
         end
       end
 
@@ -67,7 +67,7 @@ class TestSamples < Minitest::Test
         if language_matches.length > 1
           language_matches.each do |match|
             samples = "samples/#{match.name}/*#{extension}"
-            assert Dir.glob(samples).any?, "Missing samples in #{samples.inspect}. See https://github.com/github/linguist/blob/master/CONTRIBUTING.md"
+            assert Dir.glob(samples, File::FNM_CASEFOLD).any?, "Missing samples in #{samples.inspect}. See https://github.com/github/linguist/blob/master/CONTRIBUTING.md"
           end
         end
       end