mirror of https://github.com/grafana/grafana.git
111 lines
2.7 KiB
Go
111 lines
2.7 KiB
Go
package expr
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import (
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"context"
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"encoding/json"
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"sort"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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"github.com/grafana/grafana-plugin-sdk-go/backend"
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"github.com/grafana/grafana-plugin-sdk-go/data"
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"github.com/stretchr/testify/require"
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"github.com/grafana/grafana/pkg/services/datasources"
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datafakes "github.com/grafana/grafana/pkg/services/datasources/fakes"
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"github.com/grafana/grafana/pkg/setting"
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)
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func TestService(t *testing.T) {
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dsDF := data.NewFrame("test",
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data.NewField("time", nil, []time.Time{time.Unix(1, 0)}),
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data.NewField("value", nil, []*float64{fp(2)}))
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me := &mockEndpoint{
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Frames: []*data.Frame{dsDF},
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}
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cfg := setting.NewCfg()
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s := Service{
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cfg: cfg,
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dataService: me,
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dataSourceService: &datafakes.FakeDataSourceService{},
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}
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queries := []Query{
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{
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RefID: "A",
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DataSource: &datasources.DataSource{
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OrgId: 1,
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Uid: "test",
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Type: "test",
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},
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JSON: json.RawMessage(`{ "datasource": { "uid": "1" }, "intervalMs": 1000, "maxDataPoints": 1000 }`),
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TimeRange: AbsoluteTimeRange{
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From: time.Time{},
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To: time.Time{},
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},
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},
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{
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RefID: "B",
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DataSource: DataSourceModel(),
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JSON: json.RawMessage(`{ "datasource": { "uid": "__expr__", "type": "__expr__"}, "type": "math", "expression": "$A * 2" }`),
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},
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}
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req := &Request{Queries: queries}
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pl, err := s.BuildPipeline(req)
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require.NoError(t, err)
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res, err := s.ExecutePipeline(context.Background(), time.Now(), pl)
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require.NoError(t, err)
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bDF := data.NewFrame("",
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data.NewField("Time", nil, []time.Time{time.Unix(1, 0)}),
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data.NewField("B", nil, []*float64{fp(4)}))
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bDF.RefID = "B"
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expect := &backend.QueryDataResponse{
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Responses: backend.Responses{
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"A": {
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Frames: []*data.Frame{dsDF},
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},
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"B": {
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Frames: []*data.Frame{bDF},
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},
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},
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}
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// Service currently doesn't care about order of datas in the return.
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trans := cmp.Transformer("Sort", func(in []*data.Frame) []*data.Frame {
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out := append([]*data.Frame(nil), in...) // Copy input to avoid mutating it
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sort.SliceStable(out, func(i, j int) bool {
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return out[i].RefID > out[j].RefID
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})
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return out
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})
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options := append([]cmp.Option{trans}, data.FrameTestCompareOptions()...)
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if diff := cmp.Diff(expect, res, options...); diff != "" {
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t.Errorf("Result mismatch (-want +got):\n%s", diff)
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}
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}
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func fp(f float64) *float64 {
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return &f
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}
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type mockEndpoint struct {
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Frames data.Frames
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}
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func (me *mockEndpoint) QueryData(ctx context.Context, req *backend.QueryDataRequest) (*backend.QueryDataResponse, error) {
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resp := backend.NewQueryDataResponse()
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resp.Responses["A"] = backend.DataResponse{
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Frames: me.Frames,
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}
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return resp, nil
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}
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