From 7b57088beba5b9bff5fb960ae39119b86c72233e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9B=B7=E6=A1=90?= <231220169@smail.nju.edu.cn>
Date: Tue, 30 Jun 2026 02:02:29 +0800
Subject: [PATCH] Add comments/notation to
 mockExecCommandInContainerForTotalFileNums in pkg/ddc/alluxio/ufs_test.go.
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Signed-off-by: 雷桐 <231220169@smail.nju.edu.cn>
---
 pkg/ddc/alluxio/ufs_test.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/pkg/ddc/alluxio/ufs_test.go b/pkg/ddc/alluxio/ufs_test.go
index c8b05276ceb..9a252986290 100644
--- a/pkg/ddc/alluxio/ufs_test.go
+++ b/pkg/ddc/alluxio/ufs_test.go
@@ -401,6 +401,17 @@ func mockExecCommandInContainerForTotalStorageBytes() (stdout string, stderr str
 	return r, "", nil
 }
 
+// mockExecCommandInContainerForTotalFileNums mocks command execution output for total file count.
+// This helper returns a fixed stdout payload that mimics Alluxio Master metrics output
+// used by TotalFileNums() unit tests.
+//
+// Parameters:
+//   - none
+//
+// Returns:
+//   - stdout (string): Mocked metrics line containing Master.FilesCompleted counter value.
+//   - stderr (string): Empty string because this mock simulates successful execution.
+//   - err (error): Always nil for the success-path test scenario.
 func mockExecCommandInContainerForTotalFileNums() (stdout string, stderr string, err error) {
 	r := `Master.FilesCompleted  (Type: COUNTER, Value: 1,331,167)`
 	return r, "", nil