Function TestMaxQuerySamples

promql/engine_test.go:1859–2034

(t *testing.T)

}

func TestMaxQuerySamples(t *testing.T) {
	storage := promqltest.LoadedStorage(t, `
load 10s
  metric 1+1x100
  bigmetric{a="1"} 1+1x100
  bigmetric{a="2"} 1+1x100
`)

	// These test cases should be touching the limit exactly (hence no exceeding).
	// Exceeding the limit will be tested by doing -1 to the MaxSamples.
	cases := []struct {
		Query      string
		MaxSamples int
		Start      time.Time
		End        time.Time
		Interval   time.Duration
	}{
		// Instant queries.
		{
			Query:      "1",
			MaxSamples: 1,
			Start:      time.Unix(1, 0),
		},
		{
			Query:      "metric",
			MaxSamples: 1,
			Start:      time.Unix(1, 0),
		},
		{
			Query:      "metric[20s]",
			MaxSamples: 2,
			Start:      time.Unix(10, 0),
		},
		{
			Query:      "rate(metric[20s])",
			MaxSamples: 3,
			Start:      time.Unix(10, 0),
		},
		{
			Query:      "metric[20s:5s]",
			MaxSamples: 3,
			Start:      time.Unix(10, 0),
		},
		{
			Query:      "metric[20s] @ 10",
			MaxSamples: 2,
			Start:      time.Unix(0, 0),
		},
		// Range queries.
		{
			Query:      "1",
			MaxSamples: 3,
			Start:      time.Unix(0, 0),
			End:        time.Unix(2, 0),
			Interval:   time.Second,
		},
		{
			Query:      "1",