This PR is to add comments to TestTransformMasterProperties in pkg\ddc\alluxio\transform_test.go. (#4542)

* Add comments to TestTransformMasterProperties in pkg\ddc\alluxio\transform_test.go.

Signed-off-by: cocodechen <2570667128@qq.com>

* Add comments to TestTransformMasterProperties in pkg\ddc\alluxio\transform_test.go.

Signed-off-by: cocodechen <2570667128@qq.com>

---------

Signed-off-by: cocodechen <2570667128@qq.com>

Author: cocodechen

pkg/ddc/alluxio/transform_test.go

@@ -872,6 +872,19 @@ func TestAlluxioEngine_allocatePorts(t *testing.T) {
 	}
 }
 
+// TestTransformMasterProperties tests the transformMasters function of AlluxioEngine.
+// It verifies whether the master properties are correctly transformed based on the given runtime configuration.
+// The test cases ensure that the properties from the master template take precedence over the global properties.
+//
+// Test Cases:
+// 1. "master properties is not null":
+//    - Ensures that when master-specific properties exist, they override the global properties.
+//
+// 2. "properties is not null for master":
+//    - Ensures that both master-specific and additional global properties are correctly handled.
+//
+// The function iterates over multiple test cases and checks if the transformed properties
+// match the expected values. If the transformation does not produce the expected result, the test fails.
 func TestTransformMasterProperties(t *testing.T) {
 	engine := &AlluxioEngine{Log: fake.NullLogger()}