Update fixtures.py

Minor upgrade of ruff breaks without this fix

src/speckle_automate/automation_context.py

@@ -101,8 +101,17 @@ class AutomationContext:
         commit = self.speckle_client.commit.get(
             self.automation_run_data.project_id, version_id
         )
-        if not commit.referencedObject:
-            raise ValueError("The commit has no referencedObject, cannot receive it.")
+        if not commit or not commit.referencedObject:
+            raise ValueError(
+                f"""\
+                             Could not receive specified version.
+                             {"The commit has no referencedObject." if not commit.referencedObject else ""}
+                             Is your environment configured correctly?
+                             project_id: {self.automation_run_data.project_id}
+                             model_id: {self.automation_run_data.triggers[0].payload.model_id}
+                             version_id: {self.automation_run_data.triggers[0].payload.version_id}
+                             """
+            )
         base = operations.receive(
             commit.referencedObject, self._server_transport, self._memory_transport
         )

src/speckle_automate/fixtures.py

@@ -22,10 +22,10 @@ class TestAutomationEnvironment(BaseSettings):
         extra="ignore",
     )
 
-    token: str = Field()
-    server_url: str = Field()
-    project_id: str = Field()
-    automation_id: str = Field()
+    token: str = Field(default="")
+    server_url: str = Field(default="")
+    project_id: str = Field(default="")
+    automation_id: str = Field(default="")
 
 
 @pytest.fixture()

src/specklepy/core/api/models/current.py

@@ -126,7 +126,7 @@ class Version(BaseModel):
 
 
 class Model(BaseModel):
-    author: LimitedUser
+    author: Optional[LimitedUser]
     createdAt: datetime
     description: Optional[str]
     displayName: str