Make bang searches case insensitive (#438)

Bang searches now ignore the capitalization of the operator

Co-authored-by: Ben Busby <noreply+git@benbusby.com>

app/utils/bangs.py

@@ -51,6 +51,8 @@ def resolve_bang(query: str, bangs_dict: dict) -> str:
              wasn't a match or didn't contain a bang operator
 
     """
+    # Ensure bang search is case insensitive
+    query = query.lower()
     split_query = query.split(' ')
     for operator in bangs_dict.keys():
         if operator not in split_query:

test/test_routes.py

@@ -36,6 +36,11 @@ def test_ddg_bang(client):
     assert rv._status_code == 302
     assert rv.headers.get('Location').startswith('https://www.reddit.com')
 
+    # Ensure bang is case insensitive
+    rv = client.get('/search?q=!GH%20whoogle')
+    assert rv._status_code == 302
+    assert rv.headers.get('Location').startswith('https://github.com')
+
 
 def test_config(client):
     rv = client.post('/config', data=demo_config)