Test Cases for Add Datasource from YAML

[shekhar316]

Add datasource from yaml, details would be as below:

datasource : {
                        "name": "prometheus1",
      			"provider": "prometheus",
     			"serviceName": "prometheus-k8s-0",
   	   		"namespace": "monitoring",
   	   		"url": ""
}

Positive test scenarios for addDataSource:

• Valid data source without serviceName and namespace, including URL.
• Valid data source without URL, including serviceName and namespace.

Negative test scenarios for addDataSource:

• Unsupported data source provider..
• Data source already exists.
• Data source contains both URL and serviceName.
• Not reachable data source URL.
• Combination of valid and invalid datasources in JSON.
• Invalid path of JSON file containing datasource.
• Missing fields in JSON object