fix(test): test_cluster_slot_ownership_changes (#4852)

fix test: test_cluster_slot_ownership_changes

Signed-off-by: adi_holden <[email protected]>

Author: adiholden

Diff for: tests/dragonfly/cluster_test.py

@@ -691,7 +691,12 @@ async def test_cluster_slot_ownership_changes(df_factory: DflyInstanceFactory):
     )
 
     # node0 should have removed "KEY1" as it no longer owns it
-    assert await c_nodes[0].execute_command("DBSIZE") == 1
+    # deleting non owned keys is background operation therefore we add timeout to this check
+    @assert_eventually(times=2)
+    async def check_dbsize():
+        assert await c_nodes[0].execute_command("DBSIZE") == 1
+
+    await check_dbsize()
     # node0 should still own "KEY0" though
     assert (await c_nodes[0].get("KEY0")) == "value"
     # node1 should still have "KEY2"