Add missing test (sanic-org#2964)

Author: ahopkins

tests/test_naming.py

@@ -0,0 +1,57 @@
+from typing import Type
+
+from sanic import Blueprint, Sanic, text
+
+
+def factory(sanic_cls: Type[Sanic], blueprint_cls: Type[Blueprint]):
+    app = sanic_cls("Foo")
+    bp = blueprint_cls("Bar", url_prefix="/bar")
+
+    @app.get("/")
+    async def handler(request):
+        return text(request.name)
+
+    @bp.get("/")
+    async def handler(request):  # noqa: F811  // Intentionally reused handler name
+        return text(request.name)
+
+    app.blueprint(bp)
+
+    return app
+
+
+def test_vanilla_sanic():
+    app = factory(Sanic, Blueprint)
+    _, foo_response = app.test_client.get("/")
+    _, bar_response = app.test_client.get("/bar/")
+
+    assert foo_response.text == "Foo.handler"
+    assert bar_response.text == "Foo.Bar.handler"
+
+
+def test_custom_app():
+    class Custom(Sanic):
+        def generate_name(self, *objects):
+            existing = self._generate_name(*objects)
+            return existing.replace("Foo", "CHANGED_APP")
+
+    app = factory(Custom, Blueprint)
+    _, foo_response = app.test_client.get("/")
+    _, bar_response = app.test_client.get("/bar/")
+
+    assert foo_response.text == "CHANGED_APP.handler"
+    assert bar_response.text == "CHANGED_APP.Bar.handler"
+
+
+def test_custom_blueprint():
+    class Custom(Blueprint):
+        def generate_name(self, *objects):
+            existing = self._generate_name(*objects)
+            return existing.replace("Bar", "CHANGED_BP")
+
+    app = factory(Sanic, Custom)
+    _, foo_response = app.test_client.get("/")
+    _, bar_response = app.test_client.get("/bar/")
+
+    assert foo_response.text == "Foo.handler"
+    assert bar_response.text == "Foo.CHANGED_BP.handler"