| 31 | } |
| 32 | |
| 33 | func GenerateChunk(t require.TestingT, step time.Duration, from model.Time, points int, enc promchunk.Encoding, additionalLabels ...labels.Label) chunk.Chunk { |
| 34 | var hasMetricName bool |
| 35 | for _, lbl := range additionalLabels { |
| 36 | if lbl.Name == model.MetricNameLabel { |
| 37 | hasMetricName = true |
| 38 | } |
| 39 | } |
| 40 | metric := labels.NewBuilder(labels.New(additionalLabels...)) |
| 41 | if !hasMetricName { |
| 42 | metric = metric.Set(model.MetricNameLabel, "foo") |
| 43 | } |
| 44 | pe := enc.PromChunkEncoding() |
| 45 | pc, err := chunkenc.NewEmptyChunk(pe) |
| 46 | require.NoError(t, err) |
| 47 | appender, err := pc.Appender() |
| 48 | require.NoError(t, err) |
| 49 | ts := from |
| 50 | |
| 51 | switch pe { |
| 52 | case chunkenc.EncXOR: |
| 53 | for range points { |
| 54 | appender.Append(int64(ts), float64(ts)) |
| 55 | ts = ts.Add(step) |
| 56 | } |
| 57 | case chunkenc.EncHistogram: |
| 58 | histograms := histogram_util.GenerateTestHistograms(int(from), int(step/time.Millisecond), points) |
| 59 | for i := range points { |
| 60 | _, _, appender, err = appender.AppendHistogram(nil, int64(ts), histograms[i], true) |
| 61 | require.NoError(t, err) |
| 62 | ts = ts.Add(step) |
| 63 | } |
| 64 | case chunkenc.EncFloatHistogram: |
| 65 | histograms := histogram_util.GenerateTestHistograms(int(from), int(step/time.Millisecond), points) |
| 66 | for i := range points { |
| 67 | _, _, appender, err = appender.AppendFloatHistogram(nil, int64(ts), histograms[i].ToFloat(nil), true) |
| 68 | require.NoError(t, err) |
| 69 | ts = ts.Add(step) |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | ts = ts.Add(-step) // undo the add that we did just before exiting the loop |
| 74 | return chunk.NewChunk(metric.Labels(), pc, from, ts) |
| 75 | } |