Test separation of files from an object

tests/app.py

@@ -23,6 +23,18 @@ class Todo:
     creator: User
 
 
+@strawberry.input
+class DocumentInput:
+    file: Upload
+    title: str
+
+
+@strawberry.type
+class Document:
+    title: str
+    length: int
+
+
 users = [
     User(id=strawberry.ID("0"), name="Amelia"),
     User(id=strawberry.ID("1"), name="Bill"),
@@ -77,6 +89,11 @@ def read_files(self, files: typing.List[Upload]) -> typing.List[str]:
             file.seek(0)
         return contents
 
+    @strawberry.mutation
+    def read_document(self, document: DocumentInput) -> Document:
+        length = len(document.file.read().decode())
+        return Document(title=document.title, length=length)
+
     @strawberry.mutation
     def fake_user(self, id: strawberry.ID, name: str) -> User:
         return User(id=id, name=name)

tests/test_uploads.py

@@ -64,3 +64,35 @@ async def test_using_in_single_file_under_multiple_paths(graphql_session, tmp_pa
             ]
         }
     }
+
+
+async def test_separation_of_files_from_an_object(graphql_session):
+    file1 = BytesIO(b"Hello, World!")
+
+    query = """
+        mutation($document: DocumentInput!) {
+            readDocument(document: $document) {
+                title
+                length
+            }
+        }
+    """
+
+    variables = {
+        "document": {
+            "file": file1,
+            "title": "Some Title",
+        }
+    }
+
+    client = GraphQLClient(endpoint="/graphql", session=graphql_session)
+    response = await client.execute(query, variables=variables)
+
+    assert await response.json() == {
+        "data": {
+            "readDocument": {
+                "title": "Some Title",
+                "length": 13,
+            }
+        }
+    }