Fix pager test assertions for ListValue and Struct types

Relax assertion checks in generated pager tests to allow `Sequence` for `struct_pb2.ListValue` and `Mapping` for `struct_pb2.Struct`, as `proto-plus` converts these WKTs to native Python types. Also handles `struct_pb2.Value` mapping to `Any`.

This fixes an `AssertionError` where tests expected `struct_pb2.ListValue` instances but received list-like objects (e.g. `RepeatedComposite` or `list`).

Author: google-labs-jules[bot]

gapic/templates/tests/unit/gapic/%name_%version/%sub/test_%service.py.j2

@@ -26,6 +26,7 @@ from google.protobuf import json_format
 import json
 import math
 import pytest
+from collections.abc import Sequence, Mapping
 from google.api_core import api_core_version
 from proto.marshal.rules.dates import DurationRule, TimestampRule
 from proto.marshal.rules import wrappers

gapic/templates/tests/unit/gapic/%name_%version/%sub/test_macros.j2

@@ -752,8 +752,18 @@ def test_{{ method_name }}_pager(transport_name: str = "grpc"):
 
         results = list(pager)
         assert len(results) == 6
+        {% if method.paged_result_field.type.ident|string == 'struct_pb2.ListValue' %}
+        assert all(isinstance(i, Sequence)
+                   for i in results)
+        {% elif method.paged_result_field.type.ident|string == 'struct_pb2.Struct' %}
+        assert all(isinstance(i, Mapping)
+                   for i in results)
+        {% elif method.paged_result_field.type.ident|string == 'struct_pb2.Value' %}
+        assert all(True for i in results)
+        {% else %}
         assert all(isinstance(i, {{ method.paged_result_field.type.ident }})
                    for i in results)
+        {% endif %}
 {% endif %}
 def test_{{ method_name }}_pages(transport_name: str = "grpc"):
     client = {{ service.client_name }}(
@@ -913,9 +923,19 @@ async def test_{{ method_name }}_async_pager():
         assert async_pager.get('a') is None
         assert isinstance(async_pager.get('h'), {{ method.paged_result_field.type.fields.get('value').ident }})
         {% else %}
+        {% if method.paged_result_field.type.ident|string == 'struct_pb2.ListValue' %}
+        assert all(isinstance(i, Sequence)
+                for i in responses)
+        {% elif method.paged_result_field.type.ident|string == 'struct_pb2.Struct' %}
+        assert all(isinstance(i, Mapping)
+                for i in responses)
+        {% elif method.paged_result_field.type.ident|string == 'struct_pb2.Value' %}
+        assert all(True for i in responses)
+        {% else %}
         assert all(isinstance(i, {{ method.paged_result_field.type.ident }})
                 for i in responses)
         {% endif %}
+        {% endif %}
 
 
 @pytest.mark.asyncio
@@ -1412,9 +1432,19 @@ def test_{{ method_name }}_rest_pager(transport: str = 'rest'):
         assert pager.get('a') is None
         assert isinstance(pager.get('h'), {{ method.paged_result_field.type.fields.get('value').ident }})
         {% else %}
+        {% if method.paged_result_field.type.ident|string == 'struct_pb2.ListValue' %}
+        assert all(isinstance(i, Sequence)
+                for i in results)
+        {% elif method.paged_result_field.type.ident|string == 'struct_pb2.Struct' %}
+        assert all(isinstance(i, Mapping)
+                for i in results)
+        {% elif method.paged_result_field.type.ident|string == 'struct_pb2.Value' %}
+        assert all(True for i in results)
+        {% else %}
         assert all(isinstance(i, {{ method.paged_result_field.type.ident }})
                 for i in results)
         {% endif %}
+        {% endif %}
 
         pages = list(client.{{ method_name }}(request=sample_request).pages)
         for page_, token in zip(pages, ['abc','def','ghi', '']):