Use HTTPStatus in flask test server

tests/end2end/fixtures/webserver_sub.py

@@ -32,6 +32,7 @@ import time
 import signal
 import os
 import threading
+from http import HTTPStatus
 
 import cheroot.wsgi
 import flask
@@ -112,7 +113,7 @@ def redirect_n_times(n):
 def relative_redirect():
     """302 Redirect once."""
     response = app.make_response('')
-    response.status_code = 302
+    response.status_code = HTTPStatus.FOUND
     response.headers['Location'] = flask.url_for('root')
     return response
 
@@ -121,7 +122,7 @@ def relative_redirect():
 def absolute_redirect():
     """302 Redirect once."""
     response = app.make_response('')
-    response.status_code = 302
+    response.status_code = HTTPStatus.FOUND
     response.headers['Location'] = flask.url_for('root', _external=True)
     return response
 
@@ -133,7 +134,7 @@ def redirect_to():
     # werkzeug from "fixing" the URL. This endpoint should set the Location
     # header to the exact string supplied.
     response = app.make_response('')
-    response.status_code = 302
+    response.status_code = HTTPStatus.FOUND
     response.headers['Location'] = flask.request.args['url'].encode('utf-8')
     return response
 
@@ -149,7 +150,7 @@ def content_size():
     response = flask.Response(generate_bytes(), headers={
         "Content-Type": "application/octet-stream",
     })
-    response.status_code = 200
+    response.status_code = HTTPStatus.OK
     return response
 
 
@@ -163,7 +164,7 @@ def twenty_mb():
         "Content-Type": "application/octet-stream",
         "Content-Length": str(20 * 1024 * 1024),
     })
-    response.status_code = 200
+    response.status_code = HTTPStatus.OK
     return response
 
 
@@ -174,7 +175,7 @@ def internal_error_attachment():
         "Content-Type": "application/octet-stream",
         "Content-Disposition": 'inline; filename="attachment.jpg"',
     })
-    response.status_code = 500
+    response.status_code = HTTPStatus.INTERNAL_SERVER_ERROR
     return response
 
 
@@ -199,7 +200,7 @@ def basic_auth(user='user', passwd='passwd'):
     auth = flask.request.authorization
     if not auth or auth.username != user or auth.password != passwd:
         r = flask.make_response()
-        r.status_code = 401
+        r.status_code = HTTPStatus.UNAUTHORIZED
         r.headers = {'WWW-Authenticate': 'Basic realm="Fake Realm"'}
         return r
 
@@ -222,14 +223,14 @@ def drip():
         "Content-Type": "application/octet-stream",
         "Content-Length": str(numbytes),
     })
-    response.status_code = 200
+    response.status_code = HTTPStatus.OK
     return response
 
 
 @app.route('/404')
 def status_404():
     r = flask.make_response()
-    r.status_code = 404
+    r.status_code = HTTPStatus.NOT_FOUND
     return r