Add store split for Get Dashboard version method (#49138)

* Add store split for Get Dashboard version method

* Implement dashboard version service

* Fix api tests

* Remove GetDashboarVersion from sqlstore

* Add fakes for Get dashboard version

* Fix sqlstore test

* Add Get Dashboard store test

* Add dashver service test

* Remove useless comments

pkg/services/dashboardversion/dashverimpl/dashver_test.go

@@ -0,0 +1,39 @@
+package dashverimpl
+
+import (
+	"context"
+	"testing"
+
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	dashver "github.com/grafana/grafana/pkg/services/dashboardversion"
+	"github.com/stretchr/testify/require"
+)
+
+func TestDashboardVersionService(t *testing.T) {
+	dashboardVersionStore := newDashboardVersionStoreFake()
+	dashboardVersionService := Service{store: dashboardVersionStore}
+
+	t.Run("Get dashboard version", func(t *testing.T) {
+		dashboard := &dashver.DashboardVersion{
+			ID:   11,
+			Data: &simplejson.Json{},
+		}
+		dashboardVersionStore.ExpectedDashboardVersion = dashboard
+		dashboardVersion, err := dashboardVersionService.Get(context.Background(), &dashver.GetDashboardVersionQuery{})
+		require.NoError(t, err)
+		require.Equal(t, dashboardVersion, dashboard)
+	})
+}
+
+type FakeDashboardVersionStroe struct {
+	ExpectedDashboardVersion *dashver.DashboardVersion
+	ExpectedError            error
+}
+
+func newDashboardVersionStoreFake() *FakeDashboardVersionStroe {
+	return &FakeDashboardVersionStroe{}
+}
+
+func (f *FakeDashboardVersionStroe) Get(ctx context.Context, query *dashver.GetDashboardVersionQuery) (*dashver.DashboardVersion, error) {
+	return f.ExpectedDashboardVersion, f.ExpectedError
+}