fix: asyncio microgen client get_all type (#126)

* feat: create AsyncIter class for mocking

* fix: type error on mocked return on batch_get_documents

google/cloud/firestore_v1/async_client.py

@@ -252,7 +252,7 @@ async def get_all(self, references, field_paths=None, transaction=None):
             metadata=self._rpc_metadata,
         )
 
-        for get_doc_response in response_iterator:
+        async for get_doc_response in response_iterator:
             yield _parse_batch_get(get_doc_response, reference_map, self)
 
     async def collections(self):

tests/unit/v1/test__helpers.py

@@ -25,6 +25,15 @@ async def __call__(self, *args, **kwargs):
         return super(AsyncMock, self).__call__(*args, **kwargs)
 
 
+class AsyncIter:
+    def __init__(self, items):
+        self.items = items
+
+    async def __aiter__(self, **_):
+        for i in self.items:
+            yield i
+
+
 class TestGeoPoint(unittest.TestCase):
     @staticmethod
     def _get_target_class():

tests/unit/v1/test_async_client.py

@@ -18,7 +18,7 @@
 import aiounittest
 
 import mock
-from tests.unit.v1.test__helpers import AsyncMock
+from tests.unit.v1.test__helpers import AsyncMock, AsyncIter
 
 
 class TestAsyncClient(aiounittest.AsyncTestCase):
@@ -237,7 +237,7 @@ def _next_page(self):
     async def _get_all_helper(self, client, references, document_pbs, **kwargs):
         # Create a minimal fake GAPIC with a dummy response.
         firestore_api = mock.Mock(spec=["batch_get_documents"])
-        response_iterator = iter(document_pbs)
+        response_iterator = AsyncIter(document_pbs)
         firestore_api.batch_get_documents.return_value = response_iterator
 
         # Attach the fake GAPIC to a real client.

tests/unit/v1/test_async_collection.py

@@ -17,16 +17,7 @@
 import aiounittest
 
 import mock
-from tests.unit.v1.test__helpers import AsyncMock
-
-
-class MockAsyncIter:
-    def __init__(self, count):
-        self.count = count
-
-    async def __aiter__(self, **_):
-        for i in range(self.count):
-            yield i
+from tests.unit.v1.test__helpers import AsyncMock, AsyncIter
 
 
 class TestAsyncCollectionReference(aiounittest.AsyncTestCase):
@@ -258,7 +249,7 @@ async def test_list_documents_w_page_size(self):
     async def test_get(self, query_class):
         import warnings
 
-        query_class.return_value.stream.return_value = MockAsyncIter(3)
+        query_class.return_value.stream.return_value = AsyncIter(range(3))
 
         collection = self._make_one("collection")
         with warnings.catch_warnings(record=True) as warned:
@@ -280,7 +271,7 @@ async def test_get(self, query_class):
     async def test_get_with_transaction(self, query_class):
         import warnings
 
-        query_class.return_value.stream.return_value = MockAsyncIter(3)
+        query_class.return_value.stream.return_value = AsyncIter(range(3))
 
         collection = self._make_one("collection")
         transaction = mock.sentinel.txn
@@ -301,7 +292,7 @@ async def test_get_with_transaction(self, query_class):
     @mock.patch("google.cloud.firestore_v1.async_query.AsyncQuery", autospec=True)
     @pytest.mark.asyncio
     async def test_stream(self, query_class):
-        query_class.return_value.stream.return_value = MockAsyncIter(3)
+        query_class.return_value.stream.return_value = AsyncIter(range(3))
 
         collection = self._make_one("collection")
         stream_response = collection.stream()
@@ -316,7 +307,7 @@ async def test_stream(self, query_class):
     @mock.patch("google.cloud.firestore_v1.async_query.AsyncQuery", autospec=True)
     @pytest.mark.asyncio
     async def test_stream_with_transaction(self, query_class):
-        query_class.return_value.stream.return_value = MockAsyncIter(3)
+        query_class.return_value.stream.return_value = AsyncIter(range(3))
 
         collection = self._make_one("collection")
         transaction = mock.sentinel.txn