fix: HTTP body field messages with enums or recursive fields

gapic/schema/wrappers.py

@@ -97,29 +97,42 @@ def map(self) -> bool:
 
     @utils.cached_property
     def mock_value_original_type(self) -> Union[bool, str, bytes, int, float, Dict[str, Any], List[Any], None]:
-        # Return messages as dicts and let the message ctor handle the conversion.
-        if self.message:
-            if self.map:
-                # Not worth the hassle, just return an empty map.
-                return {}
+        visited_messages = set()
 
-            msg_dict = {
-                f.name: f.mock_value_original_type
-                for f in self.message.fields.values()
-            }
+        def recursive_mock_original_type(field):
+            if field.message:
+                # Return messages as dicts and let the message ctor handle the conversion.
+                if field.message in visited_messages:
+                    return {}
 
-            return [msg_dict] if self.repeated else msg_dict
+                visited_messages.add(field.message)
+                if field.map:
+                    # Not worth the hassle, just return an empty map.
+                    return {}
 
-        answer = self.primitive_mock() or None
+                msg_dict = {
+                    f.name: recursive_mock_original_type(f)
+                    for f in field.message.fields.values()
+                }
 
-        # If this is a repeated field, then the mock answer should
-        # be a list.
-        if self.repeated:
-            first_item = self.primitive_mock(suffix=1) or None
-            second_item = self.primitive_mock(suffix=2) or None
-            answer = [first_item, second_item]
+                return [msg_dict] if field.repeated else msg_dict
 
-        return answer
+            if field.enum:
+                # First Truthy value, fallback to the first value
+                return next((v for v in field.type.values if v.number), field.type.values[0]).number
+
+            answer = field.primitive_mock() or None
+
+            # If this is a repeated field, then the mock answer should
+            # be a list.
+            if field.repeated:
+                first_item = field.primitive_mock(suffix=1) or None
+                second_item = field.primitive_mock(suffix=2) or None
+                answer = [first_item, second_item]
+
+            return answer
+
+        return recursive_mock_original_type(self)
 
     @utils.cached_property
     def mock_value(self) -> str:
@@ -887,8 +900,12 @@ class HttpRule:
     def path_fields(self, method: "Method") -> List[Tuple[Field, str, str]]:
         """return list of (name, template) tuples extracted from uri."""
         input = method.input
-        return [(input.get_field(*match.group("name").split(".")), match.group("name"), match.group("template"))
-                for match in path_template._VARIABLE_RE.finditer(self.uri)]
+        return [
+            (input.get_field(*match.group("name").split(".")),
+             match.group("name"), match.group("template"))
+            for match in path_template._VARIABLE_RE.finditer(self.uri)
+            if match.group("name")
+        ]
 
     def sample_request(self, method: "Method") -> Dict[str, Any]:
         """return json dict for sample request matching the uri template."""

test_utils/test_utils.py

@@ -297,7 +297,7 @@ def make_enum(
     name: str,
     package: str = 'foo.bar.v1',
     module: str = 'baz',
-    values: typing.Tuple[str, int] = (),
+    values: typing.Sequence[typing.Tuple[str, int]] = (),
     meta: metadata.Metadata = None,
     options: desc.EnumOptions = None,
 ) -> wrappers.EnumType:

tests/fragments/test_non_primitive_body.proto

@@ -29,6 +29,20 @@ service SmallCompute {
       post: "/computation/v1/first_name/{first_name}/last_name/{last_name}"
     };
   };
+
+  rpc EnumBody(EnumBodyRequest) returns (EnumBodyResponse) {
+    option (google.api.http) = {
+      body: "resource"
+      post: "/enum_body/v1/names/{name}"
+    };
+  }
+
+  rpc RecursiveBody(RecursiveBodyRequest) returns (RecursiveBodyResponse) {
+    option (google.api.http) = {
+      body: "resource"
+      post: "/recursive_body/v1/names/{name}"
+    };
+  }
 }
 
 message SerialNumber {
@@ -50,4 +64,38 @@ message MethodRequest {
 
 message MethodResponse {
   string name = 1;
+}
+
+message EnumBodyRequest {
+  message Resource{
+    enum Ordering {
+      UNKNOWN = 0;
+      CHRONOLOGICAL = 1;
+      ALPHABETICAL = 2;
+      DIFFICULTY = 3;
+    }
+
+    Ordering ordering = 1;
+  }
+
+  string name = 1;
+  Resource resource = 2;
+}
+
+message EnumBodyResponse {
+  string data = 1;
+}
+
+message RecursiveBodyRequest {
+  message Resource {
+    int32 depth = 1;
+    Resource child_resource = 2;
+  }
+
+  string name = 1;
+  Resource resource = 2;
+}
+
+message RecursiveBodyResponse {
+  string data = 1;
 }

tests/unit/schema/wrappers/test_field.py

@@ -27,6 +27,7 @@
 from test_utils.test_utils import (
     make_field,
     make_message,
+    make_enum,
 )
 
 
@@ -343,7 +344,41 @@ def test_mock_value_original_type_message():
     assert entry_field.mock_value_original_type == {}
 
 
-def test_mock_value_recursive():
+def test_mock_value_original_type_enum():
+    mollusc_field = make_field(
+        name="class",
+        enum=make_enum(
+            name="Class",
+            values=[
+                ("UNKNOWN", 0),
+                ("GASTROPOD", 1),
+                ("BIVALVE", 2),
+                ("CEPHALOPOD", 3),
+            ],
+        ),
+    )
+
+    assert mollusc_field.mock_value_original_type == 1
+
+    empty_field = make_field(
+        name="empty",
+        enum=make_enum(
+            name="Empty",
+            values=[("UNKNOWN", 0)],
+        ),
+    )
+
+    assert empty_field.mock_value_original_type == 0
+
+
+@pytest.mark.parametrize(
+    "mock_method,expected",
+    [
+        ("mock_value", "ac_turtle.Turtle(turtle=ac_turtle.Turtle(turtle=turtle.Turtle(turtle=None)))"),
+        ("mock_value_original_type", {"turtle": {}}),
+    ],
+)
+def test_mock_value_recursive(mock_method, expected):
     # The elaborate setup is an unfortunate requirement.
     file_pb = descriptor_pb2.FileDescriptorProto(
         name="turtle.proto",
@@ -367,8 +402,7 @@ def test_mock_value_recursive():
     turtle_field = my_api.messages["animalia.chordata.v2.Turtle"].fields["turtle"]
 
     # If not handled properly, this will run forever and eventually OOM.
-    actual = turtle_field.mock_value
-    expected = "ac_turtle.Turtle(turtle=ac_turtle.Turtle(turtle=turtle.Turtle(turtle=None)))"
+    actual = getattr(turtle_field, mock_method)
     assert actual == expected