This PR is to add comments to TestJuiceFSEngine_queryCacheStatus in pkg/ddc/juicefs/cache_test.go.

pkg/ddc/juicefs/cache_test.go

@@ -33,6 +33,24 @@ import (
 	"github.com/fluid-cloudnative/fluid/pkg/utils/fake"
 )
 
+// TestJuiceFSEngine_queryCacheStatus tests the queryCacheStatus method of JuiceFSEngine
+//
+// The test is divided into two scenarios:
+// 1. queryCacheStatus success case:
+//   - Creates a mock JuiceFSRuntime environment
+//   - Mocks various engine methods:
+//   - GetRunningPodsOfDaemonset to return mock pods
+//   - GetPodMetrics to return mock metrics
+//   - GetRunningPodsOfStatefulSet to return mock pods
+//   - GetEdition to return "enterprise"
+//   - Verifies the returned cacheStates matches expected values
+//
+// 2. queryCacheStatus with tiered store case:
+//   - Similar setup but with tiered store configuration
+//   - Verifies different expected cacheStates values
+//
+// The test uses goconvey framework for BDD-style testing
+// Each scenario checks both error cases and the correctness of returned cache states
 func TestJuiceFSEngine_queryCacheStatus(t *testing.T) {
 	Convey("Test queryCacheStatus ", t, func() {
 		Convey("queryCacheStatus success", func() {