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

src/caterpillar_test.py

Index: src/caterpillar_test.py
diff --git a/src/caterpillar_test.py b/src/caterpillar_test.py
index 7ae50ff8e5beea0534d317deabb129782c30abbd..9ba0addbcd3ca0d4e422770504e31c00105d16e4 100755
--- a/src/caterpillar_test.py
+++ b/src/caterpillar_test.py
@@ -66,6 +66,7 @@ class TestCaseWithOutputDir(TestCaseWithTempDir):
     caterpillar.setup_output_dir(MINIMAL_PATH, self.output_path,
                                  BOILERPLATE_DIR)
 
+
 # Test cases.
 
 
@@ -617,5 +618,30 @@ chrome.app.runtime.onLaunched.addListener(function() {
       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()