testing.js

/**
 * @module testing
 */

import * as log from './logging.js'
import { simpleDiff } from './diff.js'
import * as object from './object.js'
import * as string from './string.js'
import * as math from './math.js'
import * as random from './random.js'
import * as prng from './prng.js'
import * as statistics from './statistics.js'
import * as array from './array.js'
import * as env from './environment.js'
import * as json from './json.js'

export { production } from './environment.js'
export const extensive = env.hasConf('extensive')

/* istanbul ignore next */
export const envSeed = env.hasParam('--seed') ? Number.parseInt(env.getParam('--seed', '0')) : null

export class TestCase {
  /**
   * @param {string} moduleName
   * @param {string} testName
   */
  constructor (moduleName, testName) {
    this.moduleName = moduleName
    this.testName = testName
    this._seed = null
    this._prng = null
  }

  resetSeed () {
    this._seed = null
    this._prng = null
  }

  /* istanbul ignore next */
  get seed () {
    /* istanbul ignore else */
    if (this._seed === null) {
      /* istanbul ignore next */
      this._seed = envSeed === null ? random.uint32() : envSeed
    }
    return this._seed
  }

  get prng () {
    /* istanbul ignore else */
    if (this._prng === null) {
      this._prng = prng.create(this.seed)
    }
    return this._prng
  }
}

/* istanbul ignore next */
// @ts-ignore
const perf = typeof performance === 'undefined' ? require('perf_hooks').performance : performance // eslint-disable-line no-undef

export const repititionTime = Number(env.getParam('--repitition-time', '50'))
/* istanbul ignore next */
const testFilter = env.hasParam('--filter') ? env.getParam('--filter', '') : null

/* istanbul ignore next */
const testFilterRegExp = testFilter !== null ? new RegExp(testFilter) : new RegExp('.*')

const repeatTestRegex = /^(repeat|repeating)\s/

/**
 * @param {string} moduleName
 * @param {string} name
 * @param {function(TestCase):void|Promise<any>} f
 * @param {number} i
 * @param {number} numberOfTests
 */
export const run = async (moduleName, name, f, i, numberOfTests) => {
  const uncamelized = string.fromCamelCase(name.slice(4), ' ')
  const filtered = !testFilterRegExp.test(`[${i + 1}/${numberOfTests}] ${moduleName}: ${uncamelized}`)
  /* istanbul ignore if */
  if (filtered) {
    return true
  }
  const tc = new TestCase(moduleName, name)
  const repeat = repeatTestRegex.test(uncamelized)
  const groupArgs = [log.GREY, `[${i + 1}/${numberOfTests}] `, log.PURPLE, `${moduleName}: `, log.BLUE, uncamelized]
  /* istanbul ignore next */
  if (testFilter === null) {
    log.groupCollapsed(...groupArgs)
  } else {
    log.group(...groupArgs)
  }
  const times = []
  const start = perf.now()
  let lastTime = start
  let err = null
  perf.mark(`${name}-start`)
  do {
    try {
      const p = f(tc)
      if (p != null && p.constructor === Promise) {
        await p
      }
    } catch (_err) {
      err = _err
    }
    const currTime = perf.now()
    times.push(currTime - lastTime)
    lastTime = currTime
    if (repeat && err === null && (lastTime - start) < repititionTime) {
      tc.resetSeed()
    } else {
      break
    }
  } while (err === null && (lastTime - start) < repititionTime)
  perf.mark(`${name}-end`)
  /* istanbul ignore if */
  if (err !== null && err.constructor !== SkipError) {
    log.printError(err)
  }
  perf.measure(name, `${name}-start`, `${name}-end`)
  log.groupEnd()
  const duration = lastTime - start
  let success = true
  times.sort((a, b) => a - b)
  /* istanbul ignore next */
  const againMessage = env.isBrowser
    ? `     - ${window.location.protocol}//${window.location.host}?filter=\\[${i + 1}/${tc._seed === null ? '' : `&seed=${tc._seed}`}`
    : `\nrepeat: npm run test -- --filter "\\[${i + 1}/" ${tc._seed === null ? '' : `--seed ${tc._seed}`}`
  const timeInfo = (repeat && err === null)
    ? ` - ${times.length} repititions in ${duration.toFixed(2)}ms (best: ${times[0].toFixed(2)}ms, worst: ${array.last(times).toFixed(2)}ms, median: ${statistics.median(times).toFixed(2)}ms, average: ${statistics.average(times).toFixed(2)}ms)`
    : ` in ${duration.toFixed(2)}ms`
  if (err !== null) {
    /* istanbul ignore else */
    if (err.constructor === SkipError) {
      log.print(log.GREY, log.BOLD, 'Skipped: ', log.UNBOLD, uncamelized)
    } else {
      success = false
      log.print(log.RED, log.BOLD, 'Failure: ', log.UNBOLD, log.UNCOLOR, uncamelized, log.GREY, timeInfo, againMessage)
    }
  } else {
    log.print(log.GREEN, log.BOLD, 'Success: ', log.UNBOLD, log.UNCOLOR, uncamelized, log.GREY, timeInfo, againMessage)
  }
  return success
}

/**
 * @param {string} description
 * @param {string} info
 */
export const describe = (description, info = '') => log.print(log.BLUE, description, ' ', log.GREY, info)

/**
 * @param {string} info
 */
export const info = info => describe('', info)

export const printDom = log.printDom

export const printCanvas = log.printCanvas

/**
 * @param {string} description
 * @param {function(void):void} f
 */
export const group = (description, f) => {
  log.group(log.BLUE, description)
  try {
    f()
  } finally {
    log.groupEnd()
  }
}

/**
 * @param {string} message
 * @param {function():void|Promise<undefined>} f
 */
export const measureTime = async (message, f) => {
  let duration = 0
  let iterations = 0
  const start = perf.now()
  while (duration < 5) {
    const p = f()
    if (p) {
      await p
    }
    duration = perf.now() - start
    iterations++
  }
  const iterationsInfo = iterations > 1 ? `, ${iterations} repititions` : ''
  log.print(log.PURPLE, message, log.GREY, ` ${(duration / iterations)}ms${iterationsInfo}`)
}

/**
 * @template T
 * @param {Array<T>} as
 * @param {Array<T>} bs
 * @param {string} [m]
 * @return {boolean}
 */
export const compareArrays = (as, bs, m = 'Arrays match') => {
  if (as.length !== bs.length) {
    fail(m)
  }
  for (let i = 0; i < as.length; i++) {
    if (as[i] !== bs[i]) {
      fail(m)
    }
  }
  return true
}

/**
 * @param {string} a
 * @param {string} b
 * @param {string} [m]
 * @throws {TestError} Throws if tests fails
 */
export const compareStrings = (a, b, m = 'Strings match') => {
  if (a !== b) {
    const diff = simpleDiff(a, b)
    log.print(log.GREY, a.slice(0, diff.index), log.RED, a.slice(diff.index, diff.remove), log.GREEN, diff.insert, log.GREY, a.slice(diff.index + diff.remove))
    fail(m)
  }
}

/**
 * @template K,V
 * @param {Object<K,V>} a
 * @param {Object<K,V>} b
 * @param {string} [m]
 * @throws {TestError} Throws if test fails
 */
export const compareObjects = (a, b, m = 'Objects match') => { object.equalFlat(a, b) || fail(m) }

/**
 * @param {any} constructor
 * @param {any} a
 * @param {any} b
 * @param {string} path
 * @throws {TestError}
 */
const compareValues = (constructor, a, b, path) => {
  if (a !== b) {
    fail(`Values ${json.stringify(a)} and ${json.stringify(b)} don't match (${path})`)
  }
  return true
}

/**
 * @param {string?} message
 * @param {string} reason
 * @param {string} path
 * @throws {TestError}
 */
const _failMessage = (message, reason, path) => fail(
  message === null
    ? `${reason} ${path}`
    : `${message} (${reason}) ${path}`
)

/**
 * @param {any} a
 * @param {any} b
 * @param {string} path
 * @param {string?} message
 * @param {function(any,any,any,string,any):boolean} customCompare
 */
const _compare = (a, b, path, message, customCompare) => {
  // we don't use assert here because we want to test all branches (istanbul errors if one branch is not tested)
  if (a == null || b == null) {
    return compareValues(null, a, b, path)
  }
  if (a.constructor !== b.constructor) {
    _failMessage(message, 'Constructors don\'t match', path)
  }
  let success = true
  switch (a.constructor) {
    case ArrayBuffer:
      a = new Uint8Array(a)
      b = new Uint8Array(b)
    // eslint-disable-next-line no-fallthrough
    case Uint8Array: {
      if (a.byteLength !== b.byteLength) {
        _failMessage(message, 'ArrayBuffer lengths match', path)
      }
      for (let i = 0; success && i < a.length; i++) {
        success = success && a[i] === b[i]
      }
      break
    }
    case Set: {
      if (a.size !== b.size) {
        _failMessage(message, 'Sets have different number of attributes', path)
      }
      // @ts-ignore
      a.forEach(value => {
        if (!b.has(value)) {
          _failMessage(message, `b.${path} does have ${value}`, path)
        }
      })
      break
    }
    case Map: {
      if (a.size !== b.size) {
        _failMessage(message, 'Maps have different number of attributes', path)
      }
      // @ts-ignore
      a.forEach((value, key) => {
        if (!b.has(key)) {
          _failMessage(message, `Property ${path}["${key}"] does not exist on second argument`, path)
        }
        _compare(value, b.get(key), `${path}["${key}"]`, message, customCompare)
      })
      break
    }
    case Object:
      if (object.length(a) !== object.length(b)) {
        _failMessage(message, 'Objects have a different number of attributes', path)
      }
      object.forEach(a, (value, key) => {
        if (!object.hasProperty(b, key)) {
          _failMessage(message, `Property ${path} does not exist on second argument`, path)
        }
        _compare(value, b[key], `${path}["${key}"]`, message, customCompare)
      })
      break
    case Array:
      if (a.length !== b.length) {
        _failMessage(message, 'Arrays have a different number of attributes', path)
      }
      // @ts-ignore
      a.forEach((value, i) => _compare(value, b[i], `${path}[${i}]`, message, customCompare))
      break
    /* istanbul ignore next */
    default:
      if (!customCompare(a.constructor, a, b, path, compareValues)) {
        _failMessage(message, `Values ${json.stringify(a)} and ${json.stringify(b)} don't match`, path)
      }
  }
  assert(success, message)
  return true
}

/**
 * @template T
 * @param {T} a
 * @param {T} b
 * @param {string?} [message]
 * @param {function(any,T,T,string,any):boolean} [customCompare]
 */
export const compare = (a, b, message = null, customCompare = compareValues) => _compare(a, b, 'obj', message, customCompare)

/* istanbul ignore next */
/**
 * @param {boolean} condition
 * @param {string?} [message]
 * @throws {TestError}
 */
export const assert = (condition, message = null) => condition || fail(`Assertion failed${message !== null ? `: ${message}` : ''}`)

/**
 * @param {function():void} f
 * @throws {TestError}
 */
export const fails = f => {
  let err = null
  try {
    f()
  } catch (_err) {
    err = _err
    log.print(log.GREEN, '⇖ This Error was expected')
  }
  /* istanbul ignore if */
  if (err === null) {
    fail('Expected this to fail')
  }
}

/**
 * @param {Object<string, Object<string, function(TestCase):void|Promise<any>>>} tests
 */
export const runTests = async tests => {
  const numberOfTests = object.map(tests, mod => object.map(mod, f => /* istanbul ignore next */ f ? 1 : 0).reduce(math.add, 0)).reduce(math.add, 0)
  let successfulTests = 0
  let testnumber = 0
  const start = perf.now()
  for (const modName in tests) {
    const mod = tests[modName]
    for (const fname in mod) {
      const f = mod[fname]
      /* istanbul ignore else */
      if (f) {
        const repeatEachTest = 1
        let success = true
        for (let i = 0; success && i < repeatEachTest; i++) {
          success = await run(modName, fname, f, testnumber, numberOfTests)
        }
        testnumber++
        /* istanbul ignore else */
        if (success) {
          successfulTests++
        }
      }
    }
  }
  const end = perf.now()
  log.print('')
  const success = successfulTests === numberOfTests
  /* istanbul ignore else */
  if (success) {
    log.print(log.GREEN, log.BOLD, 'All tests successful!', log.GREY, log.UNBOLD, ` in ${(end - start).toFixed(2)}ms`)
    /* istanbul ignore next */
    log.printImgBase64(nyanCatImage, 50)
  } else {
    const failedTests = numberOfTests - successfulTests
    log.print(log.RED, log.BOLD, `> ${failedTests} test${failedTests > 1 ? 's' : ''} failed`)
  }
  return success
}

class TestError extends Error {}

/**
 * @param {string} reason
 * @throws {TestError}
 */
export const fail = reason => {
  log.print(log.RED, log.BOLD, 'X ', log.UNBOLD, reason)
  throw new TestError('Test Failed')
}

class SkipError extends Error {}

/**
 * @param {boolean} cond If true, this tests will be skipped
 * @throws {SkipError}
 */
export const skip = (cond = true) => {
  if (cond) {
    throw new SkipError('skipping..')
  }
}

// eslint-disable-next-line
const nyanCatImage = 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'