Add notation to TestJindoEngine_DeleteVolume in pkg\ddc\jindo\delete_volume_test.go. (#4570)

Signed-off-by: Haipei Zheng <3300877412@qq.com>

Author: DreamStars1

pkg/ddc/jindo/delete_volume_test.go

@@ -76,6 +76,33 @@ func doTestCases(testCases []TestCase, t *testing.T) {
 	}
 }
 
+// TestJindoEngine_DeleteVolume tests the DeleteVolume method of JindoEngine under various scenarios.
+//
+// Parameters:
+//   - t *testing.T : Go testing framework context for test assertions and logging
+//
+// Test Strategy:
+// 1. Setup test environment with mocked Kubernetes resources:
+//    - PVs with 'CreatedBy=fluid' annotation to simulate Fluid-managed persistent volumes
+//    - PVCs with different configurations (normal vs error cases)
+// 2. Create 3 test scenarios using parameterized test pattern:
+//    Case 1: Normal deletion (JindoEngineCommon)
+//      - Input: Valid PV/PVC without conflicting annotations
+//      - Expected: Successful deletion (isDeleted=true, isErr=false)
+//    Case 2: Protected PVC deletion (JindoEngineErr)
+//      - Input: PVC with 'CreatedBy=fluid' annotation (protected resource)
+//      - Expected: Failed deletion (isErr=true)
+//    Case 3: Missing runtime scenario (JindoEngineNoRunTime)
+//      - Input: Engine with runtime=false configuration
+//      - Expected: Failed deletion (isErr=true)
+// 3. Verification: Uses doTestCases() helper to validate deletion outcomes against expectations
+//
+// Test Resources:
+// - fake.NewFakeClientWithScheme: Simulates Kubernetes API server with predefined resources
+// - testScheme: Runtime scheme for Kubernetes API objects
+// - testPVInputs/testPVCInputs: Predefined PersistentVolume and PersistentVolumeClaim configurations
+//
+// Note: This test focuses on edge cases for PVC/PV cleanup workflow in Fluid orchestration system.
 func TestJindoEngine_DeleteVolume(t *testing.T) {
 	testPVInputs := []*v1.PersistentVolume{
 		{