| 1 | 'use strict'
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| 2 |
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| 3 | const test = require('tap').test
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| 4 | const hdr = require('hdr-histogram-js')
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| 5 | const histPercentileObj = require('../')
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| 6 |
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| 7 | test('should return a valid hist as object', (t) => {
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| 8 | t.plan(24)
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| 9 | const histogram = hdr.build({
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| 10 | lowestDiscernibleValue: 1,
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| 11 | highestTrackableValue: 100
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| 12 | })
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| 13 | let total = 0
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| 14 | for (let i = 0; i < 10000; i++) {
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| 15 | const num = Math.floor(Math.random() * 100)
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| 16 | histogram.recordValue(num)
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| 17 | total += num
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| 18 | }
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| 19 |
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| 20 | // any of the numbers below _could_ be 0, so we do a type test instead of t.ok
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| 21 | const result = histPercentileObj.histAsObj(histogram, total)
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| 22 | t.ok(result)
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| 23 | t.type(result.average, 'number')
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| 24 | t.type(result.mean, 'number')
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| 25 | t.type(result.stddev, 'number')
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| 26 | t.type(result.min, 'number')
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| 27 | t.type(result.max, 'number')
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| 28 | t.type(result.total, 'number')
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| 29 |
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| 30 | const withPercentiles = histPercentileObj.addPercentiles(histogram, result)
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| 31 | t.ok(withPercentiles)
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| 32 | t.type(withPercentiles.average, 'number')
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| 33 | t.type(withPercentiles.p0_001, 'number')
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| 34 | t.type(withPercentiles.p0_01, 'number')
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| 35 | t.type(withPercentiles.p0_1, 'number')
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| 36 | t.type(withPercentiles.p1, 'number')
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| 37 | t.type(withPercentiles.p2_5, 'number')
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| 38 | t.type(withPercentiles.p10, 'number')
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| 39 | t.type(withPercentiles.p25, 'number')
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| 40 | t.type(withPercentiles.p50, 'number')
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| 41 | t.type(withPercentiles.p75, 'number')
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| 42 | t.type(withPercentiles.p90, 'number')
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| 43 | t.type(withPercentiles.p97_5, 'number')
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| 44 | t.type(withPercentiles.p99, 'number')
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| 45 | t.type(withPercentiles.p99_9, 'number')
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| 46 | t.type(withPercentiles.p99_99, 'number')
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| 47 | t.type(withPercentiles.p99_999, 'number')
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| 48 | })
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| 49 |
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| 50 | test('should return expected numbers', (t) => {
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| 51 | t.plan(18)
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| 52 | const histogram = hdr.build({
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| 53 | lowestDiscernibleValue: 1,
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| 54 | highestTrackableValue: 10
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| 55 | })
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| 56 |
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| 57 | histogram.recordValue(4)
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| 58 | histogram.recordValue(5)
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| 59 | histogram.recordValue(6)
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| 60 |
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| 61 | // any of the numbers below _could_ be 0, so we do a type test instead of t.ok
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| 62 | const result = histPercentileObj.histAsObj(histogram, 15)
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| 63 | t.ok(result)
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| 64 | t.equal(result.average, 5)
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| 65 | t.equal(result.mean, 5)
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| 66 | t.equal(result.stddev, 0.82)
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| 67 | t.equal(result.min, 4)
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| 68 | t.equal(result.max, 6)
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| 69 | t.equal(result.total, 15)
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| 70 |
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| 71 | const withPercentiles = histPercentileObj.addPercentiles(histogram, result)
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| 72 | t.ok(withPercentiles)
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| 73 | t.equal(withPercentiles.average, 5)
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| 74 | t.equal(withPercentiles.p2_5, 4)
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| 75 | t.equal(withPercentiles.p50, 5)
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| 76 | t.equal(withPercentiles.p75, 6)
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| 77 | t.equal(withPercentiles.p90, 6)
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| 78 | t.equal(withPercentiles.p97_5, 6)
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| 79 | t.equal(withPercentiles.p99, 6)
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| 80 | t.equal(withPercentiles.p99_9, 6)
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| 81 | t.equal(withPercentiles.p99_99, 6)
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| 82 | t.equal(withPercentiles.p99_999, 6)
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| 83 | })
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| 84 |
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| 85 | test('should return a valid hist as object from a WASM histogram', (t) => {
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| 86 | t.plan(1)
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| 87 | hdr.initWebAssemblySync()
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| 88 | const histogram = hdr.build({
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| 89 | useWebAssembly: true
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| 90 | })
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| 91 | t.ok(histPercentileObj.histAsObj(histogram))
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| 92 | })
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