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package hdrhistogram
import (
"bytes"
"github.com/stretchr/testify/assert"
"testing"
)
func TestHistogramLogWriter_empty(t *testing.T) {
var b bytes.Buffer
writer := NewHistogramLogWriter(&b)
err := writer.OutputLogFormatVersion()
assert.Nil(t, err)
var startTimeWritten int64 = 1000
err = writer.OutputStartTime(startTimeWritten)
assert.Nil(t, err)
err = writer.OutputLogFormatVersion()
assert.Nil(t, err)
err = writer.OutputLegend()
assert.Nil(t, err)
got, _ := b.ReadString('\n')
want := "#[Histogram log format version 1.3]\n"
assert.Equal(t, want, got)
got, _ = b.ReadString('\n')
// avoid failing tests due to GMT time differences ( so we want all to be equal up until the first + )
want = "#[StartTime: 1 (seconds since epoch), 1970-01-01"
assert.Contains(t, got, want)
}
func TestHistogramLogWriterReader(t *testing.T) {
var b bytes.Buffer
writer := NewHistogramLogWriter(&b)
err := writer.OutputLogFormatVersion()
assert.Equal(t, nil, err)
var startTimeWritten int64 = 1000
err = writer.OutputStartTime(startTimeWritten)
assert.Nil(t, err)
err = writer.OutputLogFormatVersion()
assert.Nil(t, err)
err = writer.OutputLegend()
assert.Nil(t, err)
histogram := New(1, 1000, 3)
for i := 0; i < 10; i++ {
err = histogram.RecordValue(int64(i))
assert.Nil(t, err)
}
err = writer.OutputIntervalHistogram(histogram)
assert.Equal(t, nil, err)
r := bytes.NewReader(b.Bytes())
reader := NewHistogramLogReader(r)
outHistogram, err := reader.NextIntervalHistogram()
assert.Equal(t, nil, err)
assert.Equal(t, histogram.TotalCount(), outHistogram.TotalCount())
assert.Equal(t, histogram.LowestTrackableValue(), outHistogram.LowestTrackableValue())
assert.Equal(t, histogram.HighestTrackableValue(), outHistogram.HighestTrackableValue())
}
func TestHistogramLogReader_logV2(t *testing.T) {
}
func TestHistogramLogReader_tagged_log(t *testing.T) {
}
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