refactor: Convert BuiltIn Video Block's html from mako to django template (openedx#37509)

Closes: openedx/public-engineering#427

Author: salman2013

lms/djangoapps/courseware/tests/helpers.py

@@ -3,8 +3,6 @@
 """
 
 
-import ast
-import re
 import json
 from collections import OrderedDict
 from datetime import timedelta
@@ -444,17 +442,27 @@ def get_expiration_banner_text(user, course, language='en'):  # lint-amnesty, py
     return bannerText
 
 
-def get_context_dict_from_string(data):
+def get_context_from_dict(data):
     """
-    Retrieve dictionary from string.
+     Retrieve validated dictionary from template's contextual data.
+
+    Args:
+        data: The context dictionary to validate
+
+    Returns:
+        dict: context dictionary
     """
-    # Replace tuple and un-necessary info from inside string and get the dictionary.
-    cleaned_data = data.split('((\'video.html\',')[1].replace("),\n {})", '').strip()
+    # Make a copy to avoid modifying the original dict
+    validated_data = data.copy()
+
     # Omit user_id validation
-    cleaned_data_without_user = re.sub(".*user_id.*\n?", '', cleaned_data)
+    validated_data.pop('user_id', None)
+
+    # Handle metadata field - parse and sort to ensure consistent ordering
+    if 'metadata' in validated_data and validated_data['metadata'] is not None:
+        metadata_dict = json.loads(validated_data['metadata'])
+        validated_data['metadata'] = OrderedDict(
+            sorted(metadata_dict.items(), key=lambda t: t[0])
+        )
 
-    validated_data = ast.literal_eval(cleaned_data_without_user)
-    validated_data['metadata'] = OrderedDict(
-        sorted(json.loads(validated_data['metadata']).items(), key=lambda t: t[0])
-    )
     return validated_data