93 lines
2.8 KiB
JavaScript
93 lines
2.8 KiB
JavaScript
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'use strict'
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const test = require('tap').test
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const hdr = require('hdr-histogram-js')
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const histPercentileObj = require('../')
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test('should return a valid hist as object', (t) => {
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t.plan(24)
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const histogram = hdr.build({
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lowestDiscernibleValue: 1,
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highestTrackableValue: 100
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})
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let total = 0
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for (let i = 0; i < 10000; i++) {
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const num = Math.floor(Math.random() * 100)
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histogram.recordValue(num)
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total += num
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}
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// any of the numbers below _could_ be 0, so we do a type test instead of t.ok
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const result = histPercentileObj.histAsObj(histogram, total)
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t.ok(result)
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t.type(result.average, 'number')
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t.type(result.mean, 'number')
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t.type(result.stddev, 'number')
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t.type(result.min, 'number')
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t.type(result.max, 'number')
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t.type(result.total, 'number')
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const withPercentiles = histPercentileObj.addPercentiles(histogram, result)
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t.ok(withPercentiles)
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t.type(withPercentiles.average, 'number')
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t.type(withPercentiles.p0_001, 'number')
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t.type(withPercentiles.p0_01, 'number')
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t.type(withPercentiles.p0_1, 'number')
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t.type(withPercentiles.p1, 'number')
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t.type(withPercentiles.p2_5, 'number')
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t.type(withPercentiles.p10, 'number')
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t.type(withPercentiles.p25, 'number')
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t.type(withPercentiles.p50, 'number')
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t.type(withPercentiles.p75, 'number')
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t.type(withPercentiles.p90, 'number')
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t.type(withPercentiles.p97_5, 'number')
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t.type(withPercentiles.p99, 'number')
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t.type(withPercentiles.p99_9, 'number')
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t.type(withPercentiles.p99_99, 'number')
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t.type(withPercentiles.p99_999, 'number')
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})
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test('should return expected numbers', (t) => {
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t.plan(18)
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const histogram = hdr.build({
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lowestDiscernibleValue: 1,
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highestTrackableValue: 10
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})
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histogram.recordValue(4)
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histogram.recordValue(5)
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histogram.recordValue(6)
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// any of the numbers below _could_ be 0, so we do a type test instead of t.ok
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const result = histPercentileObj.histAsObj(histogram, 15)
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t.ok(result)
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t.equal(result.average, 5)
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t.equal(result.mean, 5)
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t.equal(result.stddev, 0.82)
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t.equal(result.min, 4)
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t.equal(result.max, 6)
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t.equal(result.total, 15)
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const withPercentiles = histPercentileObj.addPercentiles(histogram, result)
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t.ok(withPercentiles)
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t.equal(withPercentiles.average, 5)
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t.equal(withPercentiles.p2_5, 4)
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t.equal(withPercentiles.p50, 5)
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t.equal(withPercentiles.p75, 6)
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t.equal(withPercentiles.p90, 6)
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t.equal(withPercentiles.p97_5, 6)
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t.equal(withPercentiles.p99, 6)
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t.equal(withPercentiles.p99_9, 6)
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t.equal(withPercentiles.p99_99, 6)
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t.equal(withPercentiles.p99_999, 6)
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})
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test('should return a valid hist as object from a WASM histogram', (t) => {
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t.plan(1)
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hdr.initWebAssemblySync()
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const histogram = hdr.build({
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useWebAssembly: true
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})
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t.ok(histPercentileObj.histAsObj(histogram))
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})
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