Add comments to TestCreateFusePersistentVolumeClaim in pkg\ddc\jindo\create_volume_test.go.

[Karenthepumpkin]

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TestCreateFusePersistentVolumeClaim in pkg\ddc\jindo\create_volume_test.go.

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// TestCreateFusePersistentVolumeClaim tests the creation of a PersistentVolumeClaim for Jindo Fuse. // It sets up a JindoEngine instance, creates a DaemonSet and Dataset, and then calls the createFusePersistentVolumeClaim method. // It verifies that the PersistentVolumeClaim is created successfully and checks if the label for runtime fuse generation is set correctly. // It uses a fake client to simulate the Kubernetes API interactions and checks the results against expected values. // It also ensures that the PersistentVolumeClaim is associated with the correct DaemonSet and Dataset. // The test checks for the correct number of PersistentVolumeClaims created and verifies the label for runtime fuse generation. // If any assertions fail, it reports an error with a descriptive message.