add test

python_modules/dagster/dagster_tests/daemon_tests/test_backfill.py

@@ -570,6 +570,49 @@ def test_canceled_backfill(
     assert instance.get_runs_count() == 1
 
 
+def test_delete_backfill(
+    instance: DagsterInstance,
+    workspace_context: WorkspaceProcessContext,
+    remote_repo: RemoteRepository,
+):
+    partition_set = remote_repo.get_partition_set("the_job_partition_set")
+    instance.add_backfill(
+        PartitionBackfill(
+            backfill_id="simple",
+            partition_set_origin=partition_set.get_remote_origin(),
+            status=BulkActionStatus.REQUESTED,
+            partition_names=["one", "two", "three"],
+            from_failure=False,
+            reexecution_steps=None,
+            tags=None,
+            backfill_timestamp=get_current_timestamp(),
+        )
+    )
+    assert instance.get_runs_count() == 0
+
+    next(
+        iter(
+            execute_backfill_iteration(
+                workspace_context, get_default_daemon_logger("BackfillDaemon")
+            )
+        )
+    )
+    assert instance.get_runs_count() == 1
+    backfill = instance.get_backfills()[0]
+    assert backfill.status == BulkActionStatus.REQUESTED
+    instance.update_backfill(backfill.with_status(BulkActionStatus.DELETING))
+    list(
+        iter(
+            execute_backfill_iteration(
+                workspace_context, get_default_daemon_logger("BackfillDaemon")
+            )
+        )
+    )
+    backfill = instance.get_backfill(backfill.backfill_id)
+    assert backfill is None
+    assert instance.get_runs_count() == 0
+
+
 def test_failure_backfill(
     instance: DagsterInstance,
     workspace_context: WorkspaceProcessContext,