Caterpillar now generates app.info.js, a metadata script. Resolves #12.

src/caterpillar_test.py

 #!/usr/bin/env python2
 # -*- coding: utf-8 -*-
 
 # Copyright 2016 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
@@ skipping 48 matching lines @@
   """Base test case for tests that require an output web app directory."""
 
   def setUp(self):
     """Makes a temporary output directory and stores it in self.output_path.
     """
     super(TestCaseWithOutputDir, self).setUp()
     self.output_path = os.path.join(self.temp_path, MINIMAL_APP_NAME)
     caterpillar.setup_output_dir(MINIMAL_PATH, self.output_path,
                                  BOILERPLATE_DIR)
 
+
 # Test cases.
 
 
 class TestSetupOutputDir(TestCaseWithTempDir):
   """Tests setup_output_dir."""
 
   def setUp(self):
     """Makes a path to an output web app and stores it in self.output_path."""
     super(TestSetupOutputDir, self).setUp()
     self.output_path = os.path.join(self.temp_path, MINIMAL_APP_NAME)
@@ skipping 531 matching lines @@
       'app': {'background': {}},
       'name': 'test233'
     }
     caterpillar.edit_code(self.output_path, [], chrome_app_manifest,
                           {'boilerplate_dir': BOILERPLATE_DIR})
     with codecs.open(os.path.join(self.output_path, 'my índex.html'),
                      encoding='utf-8') as js_file:
       self.assertIn('<meta content="test233" name="name"', js_file.read())
 
 
+class TestAddAppInfo(TestCaseWithOutputDir):
+  """Tests add_app_info."""
+
+  def test_add_app_info(self):
+    """Tests add_app_info writes the correct file."""
+    chrome_app_manifest = {
+      'app': {'background': {}},
+      'name': 'tést app',
+    }
+
+    caterpillar.add_app_info(self.output_path, chrome_app_manifest)
+
+    with open(os.path.join(self.output_path, 'app.info.js')) as app_info_file:
+      app_info_js = app_info_file.read().decode('utf-8')
+
+    self.assertEqual(app_info_js, """\
+chrome.caterpillar.manifest = {
+  'app': {
+    'background': {}
+  },
+  'name': 't\\u00e9st app'
+};
+""")
+
+
 if __name__ == '__main__':
   unittest.main()