Test that get_serializer is not called when overriden

Views' ``get_serializer`` methods should not be called when the serializer is provided by ``request_body`` or ``responses``.

Closes #154

src/drf_yasg/inspectors/view.py

@@ -89,7 +89,8 @@ class SwaggerAutoSchema(ViewInspector):
         try:
             return self.view.get_serializer()
         except Exception:
-            log.warning("view's get_serializer raised exception (%s)", type(self.view).__name__, exc_info=True)
+            log.warning("view's get_serializer raised exception (%s %s %s)",
+                        self.method, self.path, type(self.view).__name__, exc_info=True)
             return None
 
     def get_request_serializer(self):

testproj/todo/views.py

@@ -1,6 +1,8 @@
 from rest_framework import viewsets
 from rest_framework.generics import RetrieveAPIView
 
+from drf_yasg.utils import swagger_auto_schema
+
 from .models import Todo, TodoAnother, TodoTree, TodoYetAnother
 from .serializer import (
     TodoAnotherSerializer, TodoRecursiveSerializer, TodoSerializer, TodoTreeSerializer, TodoYetAnotherSerializer
@@ -36,4 +38,35 @@ class TodoTreeView(viewsets.ReadOnlyModelViewSet):
 
 class TodoRecursiveView(viewsets.ModelViewSet):
     queryset = TodoTree.objects.all()
-    serializer_class = TodoRecursiveSerializer
+
+    def get_serializer(self, *args, **kwargs):
+        raise NotImplementedError("must not call this")
+
+    def get_serializer_class(self):
+        raise NotImplementedError("must not call this")
+
+    def get_serializer_context(self):
+        raise NotImplementedError("must not call this")
+
+    @swagger_auto_schema(request_body=TodoRecursiveSerializer)
+    def create(self, request, *args, **kwargs):
+        return super(TodoRecursiveView, self).create(request, *args, **kwargs)
+
+    @swagger_auto_schema(responses={200: TodoRecursiveSerializer})
+    def retrieve(self, request, *args, **kwargs):
+        return super(TodoRecursiveView, self).retrieve(request, *args, **kwargs)
+
+    @swagger_auto_schema(request_body=TodoRecursiveSerializer)
+    def update(self, request, *args, **kwargs):
+        return super(TodoRecursiveView, self).update(request, *args, **kwargs)
+
+    @swagger_auto_schema(request_body=TodoRecursiveSerializer)
+    def partial_update(self, request, *args, **kwargs):
+        return super(TodoRecursiveView, self).update(request, *args, **kwargs)
+
+    def destroy(self, request, *args, **kwargs):
+        return super(TodoRecursiveView, self).destroy(request, *args, **kwargs)
+
+    @swagger_auto_schema(responses={200: TodoRecursiveSerializer(many=True)})
+    def list(self, request, *args, **kwargs):
+        return super(TodoRecursiveView, self).list(request, *args, **kwargs)