INTMDB-710: Serverless Instance wants to do an in-place update on every run

Author: andreaangiolillo

mongodbatlas/resource_mongodbatlas_serverless_instance.go

@@ -259,11 +259,11 @@ func resourceMongoDBAtlasServerlessInstanceRead(ctx context.Context, d *schema.R
 	if err := d.Set("connection_strings_standard_srv", serverlessInstance.ConnectionStrings.StandardSrv); err != nil {
 		return diag.Errorf("error setting `connection_strings_standard_srv` for serverless instance (%s): %s", d.Id(), err)
 	}
-	if len(serverlessInstance.ConnectionStrings.PrivateEndpoint) > 0 {
-		if err := d.Set("connection_strings_private_endpoint_srv", flattenSRVConnectionString(serverlessInstance.ConnectionStrings.PrivateEndpoint)); err != nil {
-			return diag.Errorf("error setting `connection_strings_private_endpoint_srv` for serverless instance (%s): %s", d.Id(), err)
-		}
+
+	if err := d.Set("connection_strings_private_endpoint_srv", flattenSRVConnectionString(serverlessInstance.ConnectionStrings.PrivateEndpoint)); err != nil {
+		return diag.Errorf("error setting `connection_strings_private_endpoint_srv` for serverless instance (%s): %s", d.Id(), err)
 	}
+
 	if err := d.Set("create_date", serverlessInstance.CreateDate); err != nil {
 		return diag.Errorf("error setting `create_date` for serverless instance (%s): %s", d.Id(), err)
 	}

mongodbatlas/resource_mongodbatlas_serverless_instance_test.go

@@ -31,6 +31,7 @@ func TestAccClusterRSServerlessInstance_basic(t *testing.T) {
 					resource.TestCheckResourceAttr(resourceName, "project_id", projectID),
 					resource.TestCheckResourceAttr(resourceName, "name", instanceName),
 					resource.TestCheckResourceAttr(resourceName, "termination_protection_enabled", "false"),
+					testAccCheckConnectionStringPrivateEndpointIsPresentWithNoElement(resourceName),
 				),
 			},
 		},
@@ -114,11 +115,25 @@ func testAccCheckMongoDBAtlasServerlessInstanceImportStateIDFunc(resourceName st
 		}
 
 		ids := decodeStateID(rs.Primary.ID)
-
 		return fmt.Sprintf("%s-%s", ids["project_id"], ids["name"]), nil
 	}
 }
 
+func testAccCheckConnectionStringPrivateEndpointIsPresentWithNoElement(resourceName string) resource.TestCheckFunc {
+	return func(s *terraform.State) error {
+		rs, ok := s.RootModule().Resources[resourceName]
+		if !ok {
+			return fmt.Errorf("not found: %s", resourceName)
+		}
+
+		if connectionStringPrivateEndpoint := rs.Primary.Attributes["connection_strings_private_endpoint_srv.#"]; connectionStringPrivateEndpoint == "0" {
+			return fmt.Errorf("expected connection_strings_private_endpoint_srv to be present")
+		}
+
+		return nil
+	}
+}
+
 func testAccMongoDBAtlasServerlessInstanceConfig(projectID, name string, ignoreConnectionStrings bool) string {
 	lifecycle := ""