t.Errorf("expected failed precondition error got: %v", err)
				}
			}

			// verify device staging target path
			stagingTargetPath := fakeNodeClient.FakeNodeExpansionRequest.GetStagingTargetPath()
			if tc.deviceStagePath != "" && tc.deviceStagePath != stagingTargetPath {
				t.Errorf("For %s: expected staging path %s got %s", tc.name, tc.deviceStagePath, stagingTargetPath)
			}

			if ok != tc.success {