deprecate before_first_request

tests/test_async.py

@@ -107,10 +107,12 @@ def test_async_before_after_request():
     def index():
         return ""
 
-    @app.before_first_request
-    async def before_first():
-        nonlocal app_first_called
-        app_first_called = True
+    with pytest.deprecated_call():
+
+        @app.before_first_request
+        async def before_first():
+            nonlocal app_first_called
+            app_first_called = True
 
     @app.before_request
     async def before():

tests/test_basic.py

@@ -1684,9 +1684,11 @@ def test_no_setup_after_first_request(app, client):
 def test_before_first_request_functions(app, client):
     got = []
 
-    @app.before_first_request
-    def foo():
-        got.append(42)
+    with pytest.deprecated_call():
+
+        @app.before_first_request
+        def foo():
+            got.append(42)
 
     client.get("/")
     assert got == [42]
@@ -1698,10 +1700,12 @@ def test_before_first_request_functions(app, client):
 def test_before_first_request_functions_concurrent(app, client):
     got = []
 
-    @app.before_first_request
-    def foo():
-        time.sleep(0.2)
-        got.append(42)
+    with pytest.deprecated_call():
+
+        @app.before_first_request
+        def foo():
+            time.sleep(0.2)
+            got.append(42)
 
     def get_and_assert():
         client.get("/")

tests/test_blueprints.py

@@ -722,9 +722,11 @@ def test_app_request_processing(app, client):
     bp = flask.Blueprint("bp", __name__)
     evts = []
 
-    @bp.before_app_first_request
-    def before_first_request():
-        evts.append("first")
+    with pytest.deprecated_call():
+
+        @bp.before_app_first_request
+        def before_first_request():
+            evts.append("first")
 
     @bp.before_app_request
     def before_app():