Add spec to RelativeLinkFilter for Unicode filenames

lib/gitlab/markdown/relative_link_filter.rb

@@ -99,15 +99,24 @@ module Gitlab
       # Returns a String
       def path_type(path)
         unescaped_path = Addressable::URI.unescape(path)
-        if repository.tree(current_sha, unescaped_path).entries.any?
+
+        if tree?(unescaped_path)
           'tree'
-        elsif repository.blob_at(current_sha, unescaped_path).try(:image?)
+        elsif image?(unescaped_path)
           'raw'
         else
           'blob'
         end
       end
 
+      def tree?(path)
+        repository.tree(current_sha, path).entries.any?
+      end
+
+      def image?(path)
+        repository.blob_at(current_sha, path).try(:image?)
+      end
+
       def current_sha
         context[:commit].try(:id) ||
           ref ? repository.commit(ref).try(:sha) : repository.head_commit.sha

spec/lib/gitlab/markdown/relative_link_filter_spec.rb

+# encoding: UTF-8
+
 require 'spec_helper'
 
 module Gitlab::Markdown
@@ -101,6 +103,20 @@ module Gitlab::Markdown
         expect(doc.at_css('a')['href']).to eq 'http://example.com'
       end
 
+      it 'supports Unicode filenames' do
+        path = 'files/images/한글.png'
+        escaped = Addressable::URI.escape(path)
+
+        # Stub these methods so the file doesn't actually need to be in the repo
+        allow_any_instance_of(described_class).to receive(:file_exists?).
+          and_return(true)
+        allow_any_instance_of(described_class).
+          to receive(:image?).with(path).and_return(true)
+
+        doc = filter(image(escaped))
+        expect(doc.at_css('img')['src']).to match '/raw/'
+      end
+
       context 'when requested path is a file in the repo' do
         let(:requested_path) { 'doc/api/README.md' }
         include_examples :relative_to_requested