refactor: isolate untestable bits
This commit is contained in:
Marc Cataford
parent
25c5e3c393
commit
a6c7a01fef
5 changed files with 393 additions and 312 deletions
7
src/cli.ts
Normal file
7
src/cli.ts
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@ -0,0 +1,7 @@
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#!/usr/bin/env node
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import runPackwatch from '.'
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const isUpdatingManifest = process.argv.includes('--update-manifest')
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const processExit = runPackwatch({ isUpdatingManifest })
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process.exit(processExit)
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@ -1,89 +0,0 @@
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import { spawnSync } from 'child_process'
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import { readFileSync, writeFileSync } from 'fs'
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const PACKAGE_SIZE_PATT = /package size:\s+([0-9]+\.?[0-9]*\s+[A-Za-z]+)/g
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const UNPACKED_SIZE_PATT = /unpacked size:\s+([0-9]+\.?[0-9]*\s+[A-Za-z]+)/g
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const SIZE_SUFFIX_PATT = /([A-Za-z]+)/
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const SIZE_MAGNITUDE_PATT = /([0-9]+\.?[0-9]*)/
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export const MANIFEST_FILENAME = '.packwatch.json'
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type Report = {
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packageSize: string
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unpackedSize: string
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packageSizeBytes?: number
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unpackedSizeBytes?: number
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}
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type Digest = {
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limit: string
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packageSize: string
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}
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export function convertSizeToBytes(sizeString: string): number {
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const sizeSuffix = SIZE_SUFFIX_PATT.exec(sizeString)[1]
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const sizeMagnitude = SIZE_MAGNITUDE_PATT.exec(sizeString)[1]
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let multiplier = 1
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if (sizeSuffix === 'kB') multiplier = 1000
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else if (sizeSuffix === 'mB') {
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multiplier = 1000000
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}
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return multiplier * parseFloat(sizeMagnitude)
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}
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export function getCurrentPackageStats(): Report {
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const { stderr } = spawnSync('npm', ['pack', '--dry-run'], {
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encoding: 'utf-8',
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})
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const stderrString = String(stderr)
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const packageSize = PACKAGE_SIZE_PATT.exec(stderrString)[1]
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const unpackedSize = UNPACKED_SIZE_PATT.exec(stderrString)[1]
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return {
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packageSize,
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unpackedSize,
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packageSizeBytes: convertSizeToBytes(packageSize),
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unpackedSizeBytes: convertSizeToBytes(unpackedSize),
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}
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}
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export function getPreviousPackageStats(): Report | null {
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try {
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const currentManifest = readFileSync(MANIFEST_FILENAME, {
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encoding: 'utf-8',
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})
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const parsedManifest = JSON.parse(currentManifest)
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return {
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...parsedManifest,
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packageSizeBytes: convertSizeToBytes(parsedManifest.packageSize),
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unpackedSizeBytes: convertSizeToBytes(parsedManifest.unpackedSize),
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limitBytes: convertSizeToBytes(parsedManifest.limit),
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}
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} catch {
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/* No manifest */
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}
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}
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export function createOrUpdateManifest({
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previous,
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current,
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updateLimit = false,
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}: {
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previous?: Digest
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current: Report
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updateLimit?: boolean
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}) {
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const { limit } = previous || {}
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const { packageSize, unpackedSize } = current
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const newManifest = {
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limit: updateLimit ? packageSize : limit || packageSize,
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packageSize: packageSize,
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unpackedSize: unpackedSize,
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}
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writeFileSync(MANIFEST_FILENAME, JSON.stringify(newManifest))
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}
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8
src/index.d.ts
vendored
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8
src/index.d.ts
vendored
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@ -0,0 +1,8 @@
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export type Report = {
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packageSize: string
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unpackedSize?: string
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packageSizeBytes?: number
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unpackedSizeBytes?: number
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limit?: string
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limitBytes?: number
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}
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@ -3,22 +3,10 @@ import { readFileSync } from 'fs'
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import mockFS from 'mock-fs'
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jest.mock('child_process', () => ({
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spawnSync: () => ({ stderr: mockPackOutput })
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}))
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jest.mock('child_process')
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import {
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MANIFEST_FILENAME,
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convertSizeToBytes,
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createOrUpdateManifest,
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getCurrentPackageStats,
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getPreviousPackageStats,
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} from './helpers'
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const mockPackageSize = '1.1 kB'
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const mockUnpackedSize = '9000 kB'
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const mockPackOutput = `
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function getPackOutput({ packageSize, unpackedSize }) {
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return `
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npm notice
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npm notice 📦 footprint@0.0.0
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npm notice === Tarball Contents ===
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@ -29,150 +17,246 @@ npm notice === Tarball Details ===
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npm notice name: footprint
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npm notice version: 0.0.0
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npm notice filename: footprint-0.0.0.tgz
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npm notice package size: ${mockPackageSize}
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npm notice unpacked size: ${mockUnpackedSize}
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npm notice package size: ${packageSize}
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npm notice unpacked size: ${unpackedSize}
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npm notice shasum: bdf33d471543cd8126338a82a27b16a9010b8dbd
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npm notice integrity: sha512-ZZvTg9GVcJw8J[...]bkE0xlqQhlt4Q==
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npm notice total files: 3
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npm notice
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`
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describe('Helpers', () => {
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beforeEach(() => {
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mockFS.restore()
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jest.restoreAllMocks()
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}
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import runPackwatch from '.'
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function getManifest() {
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try {
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return JSON.parse(readFileSync('.packwatch.json', { encoding: 'utf8' }))
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} catch {
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/* No manifest */
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}
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}
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function setupMockFS({
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hasPackageJSON,
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hasManifest,
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manifestLimit,
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manifestSize,
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}) {
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const fs = {}
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if (hasPackageJSON) fs['package.json'] = '{}'
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if (hasManifest)
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fs['.packwatch.json'] = JSON.stringify({
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unpackedSize: '0.5 B',
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limitBytes: manifestLimit,
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limit: `${manifestLimit} B`,
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packageSize: `${manifestSize} B`,
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packageSizeBytes: manifestSize,
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})
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mockFS(fs)
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}
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describe('Packwatch', () => {
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let mockLogger
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beforeEach(() => {
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mockFS({})
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mockLogger = jest.spyOn(global.console, 'log').mockImplementation()
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})
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afterEach(jest.restoreAllMocks)
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afterAll(mockFS.restore)
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describe('Size string conversion', () => {
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it.each`
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sizeString | expectedValue
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${'1 B'} | ${1}
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${'1.1 B'} | ${1.1}
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${'1 kB'} | ${1000}
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${'1.1kB'} | ${1100}
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${'1 mB'} | ${1000000}
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${'1.1 mB'} | ${1100000}
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`(
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'converts $sizeString properly to $expectedValue bytes',
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({ sizeString, expectedValue }) => {
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expect(convertSizeToBytes(sizeString)).toEqual(expectedValue)
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},
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it('warns the user and errors if run away from package.json', () => {
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mockFS({})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(
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'"🤔 There is no package.json file here. Are you in the root directory of your project?"',
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)
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})
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describe('Current package statistics', () => {
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it('constructs the current package report properly', () => {
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const packageSizeBytes = 1100
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const unpackedSizeBytes = 9000000
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expect(getCurrentPackageStats()).toEqual({
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packageSize: mockPackageSize,
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packageSizeBytes,
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unpackedSize: mockUnpackedSize,
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unpackedSizeBytes,
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describe('without manifest', () => {
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beforeEach(() => {
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setupMockFS({ hasPackageJSON: true })
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})
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it.each(['1 B', '1.1 B', '1 kB', '1.1 kB', '1 mB', '1.1 mB'])(
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'generates the initial manifest properly (size = %s)',
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mockSize => {
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: mockSize,
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unpackedSize: mockSize,
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}),
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})
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const returnCode = runPackwatch()
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const manifest = getManifest()
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expect(returnCode).toEqual(1)
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expect(manifest).toEqual({
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limit: mockSize,
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packageSize: mockSize,
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unpackedSize: mockSize,
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})
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},
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)
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it('outputs expected messaging', () => {
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(2)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(`
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"📝 No Manifest to compare against! Current package stats written to .packwatch.json!
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Package size (1 B) adopted as new limit."
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`)
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expect(mockLogger.mock.calls[1][0]).toMatchInlineSnapshot(
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'"❗ It looks like you ran PackWatch without a manifest. To prevent accidental passes in CI or hooks, packwatch will terminate with an error. If you are running packwatch for the first time in your project, this is expected!"',
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)
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})
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it('outputs expected messaging when not updating the manifest', () => {
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch({ isUpdatingManifest: true })
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(`
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"📝 No Manifest to compare against! Current package stats written to .packwatch.json!
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Package size (1 B) adopted as new limit."
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`)
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})
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})
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describe('Previous package statistics', () => {
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it('constructs the previous package report properly', () => {
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const packageSize = '0.9 kB'
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const packageSizeBytes = 900
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const unpackedSize = '90 kB'
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const unpackedSizeBytes = 90000
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const limit = '1 kB'
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const limitBytes = 1000
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const mockReport = { packageSize, unpackedSize, limit }
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mockFS({ [MANIFEST_FILENAME]: JSON.stringify(mockReport) })
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expect(getPreviousPackageStats()).toEqual({
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packageSize,
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packageSizeBytes,
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unpackedSize,
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unpackedSizeBytes,
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limit,
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limitBytes,
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describe('with manifest', () => {
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it('messages when the size is equal to the limit', () => {
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setupMockFS({
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hasPackageJSON: true,
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hasManifest: true,
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manifestLimit: 1,
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manifestSize: 1,
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})
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(
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'"📦 Nothing to report! Your package is the same size as the latest manifest reports! (Limit: 1 B)"',
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)
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})
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it('returns an empty manifest if it fails to reads the manifest file', () => {
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mockFS({
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[MANIFEST_FILENAME]: 'not valid JSON',
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it('messages when the size is lower than the limit (no growth)', () => {
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setupMockFS({
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hasPackageJSON: true,
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hasManifest: true,
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manifestLimit: 5,
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manifestSize: 1,
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})
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(
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'"📦 Nothing to report! Your package is the same size as the latest manifest reports! (Limit: 5 B)"',
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)
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})
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it('messages when the size is lower than the limit (growth)', () => {
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setupMockFS({
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hasPackageJSON: true,
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hasManifest: true,
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manifestLimit: 5,
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manifestSize: 2,
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})
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '3 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(
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'"📦 👀 Your package grew! 3 B > 2 B (Limit: 5 B)"',
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)
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})
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it('messages when the size is lower than the limit (shrinkage)', () => {
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setupMockFS({
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hasPackageJSON: true,
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hasManifest: true,
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manifestLimit: 5,
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manifestSize: 2,
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})
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(
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'"📦 💯 Your package shrank! 1 B < 2 B (Limit: 5 B)"',
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)
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})
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it('messages when the size exceeds the limit', () => {
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setupMockFS({
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hasPackageJSON: true,
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hasManifest: true,
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manifestLimit: 0.5,
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manifestSize: 0.5,
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})
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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runPackwatch()
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(`
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"🔥🔥📦🔥🔥 Your package exceeds the limit set in .packwatch.json! 1 B > 0.5 B
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Either update the limit by using the --update-manifest flag or trim down your packed files!"
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`)
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})
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expect(getPreviousPackageStats()).toBeUndefined()
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it('messages when updating the manifest', () => {
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setupMockFS({
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hasPackageJSON: true,
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hasManifest: true,
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manifestLimit: 0.5,
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manifestSize: 0.5,
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})
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jest.spyOn(childProcess, 'spawnSync').mockReturnValue({
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stderr: getPackOutput({
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packageSize: '1 B',
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unpackedSize: '2 B',
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}),
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})
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describe('Creating or updating the manifest', () => {
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const currentStats = {
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packageSize: '1 kB',
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unpackedSize: '10 kB',
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}
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const previousManifest = {
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limit: '2 kB',
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packageSize: '1.5 kB',
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}
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it('creates a anifest from the current data if no previous data is provided', () => {
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mockFS({})
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createOrUpdateManifest({ current: currentStats })
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const writtenManifest = readFileSync(MANIFEST_FILENAME, {
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encoding: 'utf-8',
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})
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expect(JSON.parse(writtenManifest)).toEqual({
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packageSize: currentStats.packageSize,
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unpackedSize: currentStats.unpackedSize,
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limit: currentStats.packageSize,
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})
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})
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it('updates the previous manifest sizes if previous data exists', () => {
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mockFS({
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[MANIFEST_FILENAME]: JSON.stringify(previousManifest),
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})
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createOrUpdateManifest({
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current: currentStats,
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previous: previousManifest,
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updateLimit: false,
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})
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const writtenManifest = readFileSync(MANIFEST_FILENAME, {
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encoding: 'utf-8',
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})
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expect(JSON.parse(writtenManifest)).toEqual({
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packageSize: currentStats.packageSize,
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unpackedSize: currentStats.unpackedSize,
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limit: previousManifest.limit,
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})
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})
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it('updates the previous manifest sizes and limit if previous data exists and updateLimit is set', () => {
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mockFS({
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[MANIFEST_FILENAME]: JSON.stringify(previousManifest),
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})
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createOrUpdateManifest({
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current: currentStats,
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previous: previousManifest,
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updateLimit: true,
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})
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const writtenManifest = readFileSync(MANIFEST_FILENAME, {
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encoding: 'utf-8',
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})
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expect(JSON.parse(writtenManifest)).toEqual({
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packageSize: currentStats.packageSize,
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unpackedSize: currentStats.unpackedSize,
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limit: currentStats.packageSize,
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})
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runPackwatch({ isUpdatingManifest: true })
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expect(mockLogger.mock.calls).toHaveLength(1)
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expect(mockLogger.mock.calls[0][0]).toMatchInlineSnapshot(
|
||||
'"📝 Updated the manifest! Package size: 1 B, Limit: 1 B"',
|
||||
)
|
||||
})
|
||||
})
|
||||
})
|
||||
|
|
|
|||
117
src/index.ts
117
src/index.ts
|
|
@ -1,23 +1,98 @@
|
|||
#!/usr/bin/env node
|
||||
import { spawnSync } from 'child_process'
|
||||
import { existsSync, readFileSync, writeFileSync } from 'fs'
|
||||
|
||||
const { existsSync } = require('fs')
|
||||
import { Report } from './index.d'
|
||||
|
||||
const {
|
||||
MANIFEST_FILENAME,
|
||||
getCurrentPackageStats,
|
||||
getPreviousPackageStats,
|
||||
createOrUpdateManifest,
|
||||
} = require('./helpers')
|
||||
const PACKAGE_SIZE_PATT = /package size:\s*([0-9]+\.?[0-9]*\s+[A-Za-z]{1,2})/
|
||||
const UNPACKED_SIZE_PATT = /unpacked size:\s*([0-9]+\.?[0-9]*\s+[A-Za-z]{1,2})/
|
||||
const SIZE_SUFFIX_PATT = /([A-Za-z]+)/
|
||||
const SIZE_MAGNITUDE_PATT = /([0-9]+\.?[0-9]*)/
|
||||
|
||||
const MANIFEST_FILENAME = '.packwatch.json'
|
||||
|
||||
function convertSizeToBytes(sizeString: string): number {
|
||||
const sizeSuffix = SIZE_SUFFIX_PATT.exec(sizeString)[1]
|
||||
const sizeMagnitude = SIZE_MAGNITUDE_PATT.exec(sizeString)[1]
|
||||
|
||||
let multiplier = 1
|
||||
|
||||
if (sizeSuffix === 'kB') multiplier = 1000
|
||||
else if (sizeSuffix === 'mB') {
|
||||
multiplier = 1000000
|
||||
}
|
||||
|
||||
return multiplier * parseFloat(sizeMagnitude)
|
||||
}
|
||||
|
||||
function getCurrentPackageStats(): Report {
|
||||
const { stderr } = spawnSync('npm', ['pack', '--dry-run'], {
|
||||
encoding: 'utf-8',
|
||||
})
|
||||
const stderrString = String(stderr)
|
||||
const packageSize = PACKAGE_SIZE_PATT.exec(stderrString)[1]
|
||||
const unpackedSize = UNPACKED_SIZE_PATT.exec(stderrString)[1]
|
||||
|
||||
return {
|
||||
packageSize,
|
||||
unpackedSize,
|
||||
packageSizeBytes: convertSizeToBytes(packageSize),
|
||||
unpackedSizeBytes: convertSizeToBytes(unpackedSize),
|
||||
}
|
||||
}
|
||||
|
||||
function getPreviousPackageStats(): Report | null {
|
||||
try {
|
||||
const currentManifest = readFileSync(MANIFEST_FILENAME, {
|
||||
encoding: 'utf-8',
|
||||
})
|
||||
const parsedManifest = JSON.parse(currentManifest)
|
||||
return {
|
||||
...parsedManifest,
|
||||
packageSizeBytes: convertSizeToBytes(parsedManifest.packageSize),
|
||||
unpackedSizeBytes: convertSizeToBytes(parsedManifest.unpackedSize),
|
||||
limitBytes: convertSizeToBytes(parsedManifest.limit),
|
||||
}
|
||||
} catch {
|
||||
/* No manifest */
|
||||
}
|
||||
}
|
||||
|
||||
function createOrUpdateManifest({
|
||||
previous,
|
||||
current,
|
||||
updateLimit = false,
|
||||
}: {
|
||||
previous?: Report
|
||||
current: Report
|
||||
updateLimit?: boolean
|
||||
}): void {
|
||||
const { limit } = previous || {}
|
||||
const { packageSize, unpackedSize } = current
|
||||
|
||||
const newManifest = {
|
||||
limit: updateLimit ? packageSize : limit || packageSize,
|
||||
packageSize: packageSize,
|
||||
unpackedSize: unpackedSize,
|
||||
}
|
||||
|
||||
writeFileSync(MANIFEST_FILENAME, JSON.stringify(newManifest))
|
||||
}
|
||||
export default function run(
|
||||
{
|
||||
manifestFn = MANIFEST_FILENAME,
|
||||
isUpdatingManifest,
|
||||
}: { manifestFn?: string; isUpdatingManifest?: boolean } = {
|
||||
manifestFn: MANIFEST_FILENAME,
|
||||
isUpdatingManifest: false,
|
||||
},
|
||||
): number {
|
||||
if (!existsSync('package.json')) {
|
||||
console.log(
|
||||
'🤔 There is no package.json file here. Are you in the root directory of your project?',
|
||||
)
|
||||
process.exit(1)
|
||||
return 1
|
||||
}
|
||||
|
||||
const isUpdatingManifest = process.argv.includes('--update-manifest')
|
||||
|
||||
const currentStats = getCurrentPackageStats()
|
||||
|
||||
/*
|
||||
|
|
@ -25,13 +100,10 @@ const currentStats = getCurrentPackageStats()
|
|||
* a base to build one. The current package size becomes the limit.
|
||||
*/
|
||||
|
||||
if (!existsSync(MANIFEST_FILENAME)) {
|
||||
if (!existsSync(manifestFn)) {
|
||||
createOrUpdateManifest({ current: currentStats })
|
||||
console.log(
|
||||
`📝 No Manifest to compare against! Current package stats written to ${MANIFEST_FILENAME}!`,
|
||||
)
|
||||
console.log(
|
||||
`Package size (${currentStats.packageSize}) adopted as new limit.`,
|
||||
`📝 No Manifest to compare against! Current package stats written to ${MANIFEST_FILENAME}!\nPackage size (${currentStats.packageSize}) adopted as new limit.`,
|
||||
)
|
||||
|
||||
if (!isUpdatingManifest) {
|
||||
|
|
@ -41,7 +113,7 @@ if (!existsSync(MANIFEST_FILENAME)) {
|
|||
}
|
||||
// If the update flag wasn't specified, exit with a non-zero code so we
|
||||
// don't "accidentally" pass CI builds if the manifest didn't exist
|
||||
process.exit(isUpdatingManifest ? 0 : 1)
|
||||
return isUpdatingManifest ? 0 : 1
|
||||
}
|
||||
|
||||
const previousStats = getPreviousPackageStats()
|
||||
|
|
@ -67,7 +139,7 @@ if (isUpdatingManifest) {
|
|||
console.log(
|
||||
`📝 Updated the manifest! Package size: ${packageSize}, Limit: ${packageSize}`,
|
||||
)
|
||||
process.exit(0)
|
||||
return 0
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -77,12 +149,9 @@ if (isUpdatingManifest) {
|
|||
|
||||
if (hasExceededLimit) {
|
||||
console.log(
|
||||
`🔥🔥📦🔥🔥 Your package exceeds the limit set in ${MANIFEST_FILENAME}! ${packageSize} > ${limit}`,
|
||||
`🔥🔥📦🔥🔥 Your package exceeds the limit set in ${MANIFEST_FILENAME}! ${packageSize} > ${limit}\nEither update the limit by using the --update-manifest flag or trim down your packed files!`,
|
||||
)
|
||||
console.log(
|
||||
'Either update the limit by using the --update-manifest flag or trim down your packed files!',
|
||||
)
|
||||
process.exit(1)
|
||||
return 1
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -104,3 +173,5 @@ if (packageSizeBytes > previousSizeBytes) {
|
|||
`📦 Nothing to report! Your package is the same size as the latest manifest reports! (Limit: ${limit})`,
|
||||
)
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
|
|
|||
Reference in a new issue