Function TestBucketLimitAppender

scrape/target_test.go:526–676

(t *testing.T)

}

func TestBucketLimitAppender(t *testing.T) {
	example := histogram.Histogram{
		Schema:        0,
		Count:         21,
		Sum:           33,
		ZeroThreshold: 0.001,
		ZeroCount:     3,
		PositiveSpans: []histogram.Span{
			{Offset: 0, Length: 3},
		},
		PositiveBuckets: []int64{3, 0, 0},
		NegativeSpans: []histogram.Span{
			{Offset: 0, Length: 3},
		},
		NegativeBuckets: []int64{3, 0, 0},
	}

	bigGap := histogram.Histogram{
		Schema:        0,
		Count:         21,
		Sum:           33,
		ZeroThreshold: 0.001,
		ZeroCount:     3,
		PositiveSpans: []histogram.Span{
			{Offset: 1, Length: 1}, // in (1, 2]
			{Offset: 2, Length: 1}, // in (8, 16]
		},
		PositiveBuckets: []int64{1, 0}, // 1, 1
	}

	customBuckets := histogram.Histogram{
		Schema: histogram.CustomBucketsSchema,
		Count:  9,
		Sum:    33,
		PositiveSpans: []histogram.Span{
			{Offset: 0, Length: 3},
		},
		PositiveBuckets: []int64{3, 0, 0},
		CustomValues:    []float64{1, 2, 3},
	}

	cases := []struct {
		h                 histogram.Histogram
		limit             int
		expectError       bool
		expectBucketCount int
		expectSchema      int32
	}{
		{
			h:           example,
			limit:       3,
			expectError: true,
		},
		{
			h:                 example,
			limit:             4,
			expectError:       false,
			expectBucketCount: 4,