fix: add pragma comments for Python 3.7 coverage and fix options handling

- Add pragma: no cover comments for ASGI-specific code paths that won't execute in Python 3.7
- Fix options dict handling to use consistent variable names to avoid confusion

Author: taeold

.gitignore

@@ -10,3 +10,5 @@ dist/
 function_output.json
 serverlog_stderr.txt
 serverlog_stdout.txt
+venv/
+test-integration

src/functions_framework/_cli.py

@@ -40,7 +40,7 @@
     help="Server gateway interface type (wsgi for sync, asgi for async)",
 )
 def _cli(target, source, signature_type, host, port, debug, gateway):
-    if gateway == "asgi":
+    if gateway == "asgi":  # pragma: no cover
         from functions_framework.aio import create_asgi_app
 
         app = create_asgi_app(target, source, signature_type)

src/functions_framework/_http/__init__.py

@@ -35,7 +35,7 @@ def __init__(self, app, debug, **options):
                     self.server_class = GunicornApplication
                 except ImportError as e:
                     self.server_class = FlaskApplication
-        else:
+        else:  # pragma: no cover
             # ASGI app (Starlette or other)
             if self.debug:
                 from functions_framework._http.asgi import StarletteApplication

src/functions_framework/_http/gunicorn.py

@@ -61,10 +61,10 @@ class GunicornApplication(BaseGunicornApplication):
     def __init__(self, app, host, port, debug, **options):
         threads = int(os.environ.get("THREADS", (os.cpu_count() or 1) * 4))
         # Make a copy to avoid mutating the passed-in options dict
-        options = dict(options)
-        options["threads"] = threads
+        options_copy = dict(options)
+        options_copy["threads"] = threads
 
-        super().__init__(app, host, port, debug, **options)
+        super().__init__(app, host, port, debug, **options_copy)
 
         # Use custom worker with timeout support if conditions are met
         if (
@@ -89,6 +89,7 @@ class UvicornApplication(BaseGunicornApplication):
     """Gunicorn application for ASGI apps using Uvicorn workers."""
 
     def __init__(self, app, host, port, debug, **options):
-        options = dict(options)
-        options["worker_class"] = "uvicorn_worker.UvicornWorker"
-        super().__init__(app, host, port, debug, **options)
+        # Make a copy to avoid mutating the passed-in options dict
+        options_copy = dict(options)
+        options_copy["worker_class"] = "uvicorn_worker.UvicornWorker"
+        super().__init__(app, host, port, debug, **options_copy)