Datasources: Add service function to get by group, name, and namespace (#113066)

pkg/services/datasources/fakes/fake_datasource_service.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net/http"
 
+	"github.com/grafana/authlib/types"
 	sdkhttpclient "github.com/grafana/grafana-plugin-sdk-go/backend/httpclient"
 
 	"github.com/grafana/grafana/pkg/infra/httpclient"
@@ -30,6 +31,19 @@ func (s *FakeDataSourceService) GetDataSource(ctx context.Context, query *dataso
 	return nil, datasources.ErrDataSourceNotFound
 }
 
+func (s *FakeDataSourceService) GetDataSourceInNamespace(ctx context.Context, namespace, name, group string) (*datasources.DataSource, error) {
+	ns, err := types.ParseNamespace(namespace)
+	if err != nil {
+		return nil, err
+	}
+	for _, dataSource := range s.DataSources {
+		if name == dataSource.UID && ns.OrgID == dataSource.OrgID && group == dataSource.Type {
+			return dataSource, nil
+		}
+	}
+	return nil, datasources.ErrDataSourceNotFound
+}
+
 func (s *FakeDataSourceService) GetDataSources(ctx context.Context, query *datasources.GetDataSourcesQuery) ([]*datasources.DataSource, error) {
 	var dataSources []*datasources.DataSource
 	for _, datasource := range s.DataSources {