receiver/azuremonitor - added config check and unit test cases

Author: suvaidkhan

receiver/azuremonitorreceiver/config.go

@@ -28,6 +28,7 @@ var (
 	errMissingClientSecret    = errors.New(`"ClientSecret" is not specified in config`)
 	errMissingFedTokenFile    = errors.New(`"FederatedTokenFile" is not specified in config`)
 	errInvalidCloud           = errors.New(`"Cloud" is invalid`)
+	errInvalidMaxResPerBatch  = errors.New(`"MaximumResourcesPerBatch" should be greater than 0`)
 
 	monitorServices = []string{
 		"Microsoft.EventGrid/eventSubscriptions",
@@ -332,5 +333,9 @@ func (c Config) Validate() (err error) {
 		err = multierr.Append(err, errInvalidCloud)
 	}
 
+	if c.UseBatchAPI && c.MaximumResourcesPerBatch < 0 {
+		err = multierr.Append(err, errInvalidMaxResPerBatch)
+	}
+
 	return
 }

receiver/azuremonitorreceiver/config_test.go

@@ -109,6 +109,10 @@ func TestLoadConfig(t *testing.T) {
 				return cfg
 			}(),
 		},
+		{
+			id:          component.NewIDWithName(metadata.Type, "max_resources_per_batch_negative_value"),
+			expectedErr: errInvalidMaxResPerBatch.Error(),
+		},
 	}
 
 	for _, tt := range tests {

receiver/azuremonitorreceiver/testdata/config.yaml

@@ -39,4 +39,12 @@ azuremonitor/valid_authenticator_2:
   discover_subscriptions: true
   auth:
     authenticator: azureauth
-  credentials: does-not-matter
+  credentials: does-not-matter
+
+azuremonitor/max_resources_per_batch_negative_value:
+  discover_subscriptions: true
+  auth:
+    authenticator: azureauth
+  credentials: does-not-matter
+  use_batch_api: true
+  maximum_resources_per_batch: -1