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TestSecondaryHashFunction: Support stringlabels

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Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>
This commit is contained in:
Arve Knudsen 2023-11-27 16:09:00 +01:00
parent bd85da0031
commit 6e6de8212a
1 changed files with 23 additions and 7 deletions
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30
tsdb/head_test.go
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@ -5612,6 +5612,24 @@ func TestHeadCompactionWhileAppendAndCommitExemplar(t *testing.T) {
h.Close()
}
func labelsWithHashCollision() (labels.Labels, labels.Labels) {
// These two series have the same XXHash; thanks to https://github.com/pstibrany/labels_hash_collisions
ls1 := labels.FromStrings("__name__", "metric", "lbl1", "value", "lbl2", "l6CQ5y")
ls2 := labels.FromStrings("__name__", "metric", "lbl1", "value", "lbl2", "v7uDlF")
if ls1.Hash() != ls2.Hash() {
// These ones are the same when using -tags stringlabels
ls1 = labels.FromStrings("__name__", "metric", "lbl", "HFnEaGl")
ls2 = labels.FromStrings("__name__", "metric", "lbl", "RqcXatm")
}
if ls1.Hash() != ls2.Hash() {
panic("This code needs to be updated: find new labels with colliding hash values.")
}
return ls1, ls2
}
func TestSecondaryHashFunction(t *testing.T) {
checkSecondaryHashes := func(t *testing.T, h *Head, labelsCount, expected int) {
reportedHashes := 0
@ -5639,17 +5657,15 @@ func TestSecondaryHashFunction(t *testing.T) {
name: "with collisions",
series: func(t *testing.T) []storage.Series {
// Make a couple of series with colliding label sets
collidingSet := map[string]string{"__name__": "metric"}
collidingSet["lbl"] = "qeYKm3"
lbls1, lbls2 := labelsWithHashCollision()
series := []storage.Series{
storage.NewListSeries(
labels.FromMap(collidingSet), []chunks.Sample{sample{t: 0, f: rand.Float64()}},
lbls1, []chunks.Sample{sample{t: 0, f: rand.Float64()}},
),
storage.NewListSeries(
lbls2, []chunks.Sample{sample{t: 0, f: rand.Float64()}},
),
}
collidingSet["lbl"] = "2fUczT"
series = append(series, storage.NewListSeries(
labels.FromMap(collidingSet), []chunks.Sample{sample{t: 0, f: rand.Float64()}},
))
require.Equal(t, series[len(series)-2].Labels().Hash(), series[len(series)-1].Labels().Hash(),
"The two series should have the same label set hash")
return series