Read json file in text mode to support Python 3

.travis.yml

@@ -1,6 +1,8 @@
 ---
 language: 'python'
-python: '2.7'
+python:
+  - '2.7'
+  - '3.4'
 
 before_install:
   - 'pip install setuptools flake8 pytest'

flask_webpack/__init__.py

@@ -46,7 +46,7 @@ def _set_asset_paths(self, app):
         webpack_stats = app.config['WEBPACK_MANIFEST_PATH']
 
         try:
-            with app.open_resource(webpack_stats) as stats_json:
+            with app.open_resource(webpack_stats, 'r') as stats_json:
                 stats = json.load(stats_json)
 
                 if app.config['WEBPACK_ASSETS_URL']:

flask_webpack/tests/test_app/tests/test_views.py

@@ -8,7 +8,8 @@ def test_index_page(client):
     js = 'app_js.8b7c0de88caa3f366b53.js'
     image = 'images/dog/no-idea.b9252d5fd8f39ce3523d303144338d7b.jpg'
 
-    assert asset_path in response.data
-    assert css in response.data
-    assert js in response.data
-    assert image in response.data
+    response_data = response.data.decode('utf-8')
+    assert asset_path in response_data
+    assert css in response_data
+    assert js in response_data
+    assert image in response_data