FIX: upload watched words should use UTF-8

spec/integration/watched_words_spec.rb

@@ -179,4 +179,25 @@ describe WatchedWord do
       }.to_not change { PostAction.count }
     end
   end
+
+  describe 'upload' do
+    context 'logged in as admin' do
+      before do
+        sign_in(admin)
+      end
+
+      it 'creates the words from the file' do
+        post '/admin/logs/watched_words/upload.json', params: {
+          action_key: 'flag',
+          file: Rack::Test::UploadedFile.new(file_from_fixtures("words.csv", "csv"))
+        }
+        expect(response.status).to eq(200)
+        expect(WatchedWord.count).to eq(6)
+        expect(WatchedWord.pluck(:word)).to contain_exactly(
+          'thread', '线', 'धागा', '실', 'tråd', 'нить'
+        )
+        expect(WatchedWord.pluck(:action).uniq).to eq([WatchedWord.actions[:flag]])
+      end
+    end
+  end
 end