mirror of
https://github.com/datashard/snapshot.git
synced 2024-10-05 03:09:10 +00:00
fully working plugin, just missing more features
This commit is contained in:
Joshua
parent
1831604a83
commit
faeb258eb9
6 changed files with 184 additions and 207 deletions
213
src/index.js
213
src/index.js
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@ -1,211 +1,10 @@
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'use strict'
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"use strict";
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/* global cy, Cypress */
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const itsName = require('its-name')
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const { initStore } = require('snap-shot-store')
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const la = require('lazy-ass')
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const is = require('check-more-types')
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const compare = require('snap-shot-compare')
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const path = require('path')
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// global cy, Cypress
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const {
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serializeDomElement,
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serializeToHTML,
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identity,
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countSnapshots
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} = require('./utils')
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const DEFAULT_CONFIG_OPTIONS = {
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// using relative snapshots requires a simple
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// 'readFileMaybe' plugin to be configured
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// see https://on.cypress.io/task#Read-a-file-that-might-not-exist
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useRelativeSnapshots: false,
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snapshotFileName: 'snapshots.js'
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}
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/* eslint-disable no-console */
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function compareValues ({ expected, value }) {
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const noColor = true
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const json = true
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return compare({ expected, value, noColor, json })
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}
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function registerCypressSnapshot () {
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la(is.fn(global.before), 'missing global before function')
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la(is.fn(global.after), 'missing global after function')
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la(is.object(global.Cypress), 'missing Cypress object')
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const useRelative = Cypress.config('useRelativeSnapshots')
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const config = {
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useRelativeSnapshots: useRelative === undefined ? DEFAULT_CONFIG_OPTIONS.useRelativeSnapshots : useRelative,
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snapshotFileName: Cypress.config('snapshotFileName') || DEFAULT_CONFIG_OPTIONS.snapshotFileName
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}
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console.log('registering @cypress/snapshot')
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let storeSnapshot
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// for each full test name, keeps number of snapshots
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// allows using multiple snapshots inside single test
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// without confusing them
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// eslint-disable-next-line immutable/no-let
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let counters = {}
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function getSnapshotIndex (key) {
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if (key in counters) {
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// eslint-disable-next-line immutable/no-mutation
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counters[key] += 1
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} else {
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// eslint-disable-next-line immutable/no-mutation
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counters[key] = 1
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}
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return counters[key]
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}
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let snapshotFileName = config.snapshotFileName
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if (config.useRelativeSnapshots) {
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let relative = Cypress.spec.relative
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if (Cypress.platform === 'win32') {
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relative = relative.replace(/\\/g, path.sep)
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}
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snapshotFileName = path.join(path.dirname(relative), config.snapshotFileName)
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}
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function evaluateLoadedSnapShots (js) {
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la(is.string(js), 'expected JavaScript snapshot source', js)
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console.log('read snapshots.js file')
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const store = eval(js) || {}
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console.log('have %d snapshot(s)', countSnapshots(store))
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storeSnapshot = initStore(store)
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}
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global.before(function loadSnapshots () {
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let readFile
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if (config.useRelativeSnapshots) {
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readFile = cy
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.task('readFileMaybe', snapshotFileName)
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.then(function (contents) {
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if (!contents) {
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return cy.writeFile(snapshotFileName, '', 'utf-8', { log: false })
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}
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return contents
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})
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} else {
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readFile = cy
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.readFile(snapshotFileName, 'utf-8')
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}
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readFile.then(evaluateLoadedSnapShots)
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// no way to catch an error yet
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})
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function getTestName (test) {
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const names = itsName(test)
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// la(is.strings(names), 'could not get name from current test', test)
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return names
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}
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function getSnapshotName (test, humanName) {
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const names = getTestName(test)
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const key = names.join(' - ')
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const index = humanName || getSnapshotIndex(key)
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names.push(String(index))
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return names
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}
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function setSnapshot (name, value, $el) {
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// snapshots were not initialized
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if (!storeSnapshot) {
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return
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}
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// show just the last part of the name list (the index)
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const message = Cypress._.last(name)
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console.log('current snapshot name', name)
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const devToolsLog = {
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value
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}
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if (Cypress.dom.isJquery($el)) {
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// only add DOM elements, otherwise "expected" value is enough
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devToolsLog.$el = $el
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}
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const options = {
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name: 'snapshot',
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message,
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consoleProps: () => devToolsLog
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}
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if ($el) {
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options.$el = $el
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}
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const cyRaiser = ({ value, expected }) => {
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const result = compareValues({ expected, value })
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result.orElse((json) => {
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// by deleting property and adding it at the last position
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// we reorder how the object is displayed
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// We want convenient:
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// - message
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// - expected
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// - value
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devToolsLog.message = json.message
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devToolsLog.expected = expected
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delete devToolsLog.value
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devToolsLog.value = value
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throw new Error(`Snapshot difference. To update, delete snapshot and rerun test.\n${json.message}`)
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})
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}
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Cypress.log(options)
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storeSnapshot({
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value,
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name,
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raiser: cyRaiser
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})
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}
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const pickSerializer = (asJson, value) => {
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if (Cypress.dom.isJquery(value)) {
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return asJson ? serializeDomElement : serializeToHTML
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}
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return identity
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}
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function snapshot (value, { name, json } = {}) {
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console.log('human name', name)
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const snapshotName = getSnapshotName(this.test, name)
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const serializer = pickSerializer(json, value)
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const serialized = serializer(value)
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setSnapshot(snapshotName, serialized, value)
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// always just pass value
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return value
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}
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Cypress.Commands.add('snapshot', { prevSubject: true }, snapshot)
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global.after(function saveSnapshots () {
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if (storeSnapshot) {
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const snapshots = storeSnapshot()
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console.log('%d snapshot(s) on finish', countSnapshots(snapshots))
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console.log(snapshots)
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snapshots.__version = Cypress.version
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const s = JSON.stringify(snapshots, null, 2)
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const str = `module.exports = ${s}\n`
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cy.writeFile(snapshotFileName, str, 'utf-8', { log: false })
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}
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})
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return snapshot
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}
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const { functions } = require("./utils/index");
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module.exports = {
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register: registerCypressSnapshot
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}
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register: functions.register,
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tasks: functions.tasks
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};
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5
src/utils/functions/addTasks.js
Normal file
5
src/utils/functions/addTasks.js
Normal file
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const readFileMaybe = require("../tasks/readFileMaybe");
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module.exports = (on, config) => {
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on("task", { readFileMaybe });
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};
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13
src/utils/functions/register.js
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13
src/utils/functions/register.js
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const lazy = require("lazy-ass");
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const is = require("check-more-types");
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const snapshot = require("../snapshots/snapshot");
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module.exports = () => {
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lazy(is.fn(global.before), "Missing global before function");
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lazy(is.fn(global.after), "Missing global after function");
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lazy(is.object(global.Cypress), "Missing Cypress object");
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Cypress.Commands.add("snapshot", { prevSubject: true }, snapshot);
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return snapshot;
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};
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28
src/utils/index.js
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28
src/utils/index.js
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const serializeToHTML = require("./serializers/serializeToHTML");
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const serializeDomElement = require("./serializers/serializeDomElement");
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const compareValues = require("./snapshots/compareValues");
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const readFileMaybe = require("./tasks/readFileMaybe");
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const identity = (x) => x;
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const publicProps = (name) => !name.startsWith("__");
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const countSnapshots = (snapshots) =>
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Object.keys(snapshots).filter(publicProps).length;
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module.exports = {
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serializers: {
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serializeDomElement,
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serializeToHTML,
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identity,
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countSnapshots,
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},
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snapshots: {
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compareValues,
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},
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config: require("./config"),
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functions: {
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register: require("./functions/register"),
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tasks: require("./functions/addTasks")
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},
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tasks: {
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readFileMaybe
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},
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};
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123
src/utils/snapshots/snapshot.js
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123
src/utils/snapshots/snapshot.js
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const serializeDomElement = require("../serializers/serializeDomElement");
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const serializeToHTML = require("../serializers/serializeToHTML");
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const compareValues = require("./compareValues");
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const { initStore } = require("snap-shot-store");
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// const itsName = require("its-name");
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const path = require("path");
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const identity = (x) => x;
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// Value = the JSON we want to store/compare
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// name = the Human Readable name of this Snapshot
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// json = decides if we convert DOM elements into JSON when storing in the snapshot file
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const pickSerializer = (asJson, value) => {
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if (Cypress.dom.isJquery(value)) {
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return asJson ? serializeDomElement : serializeToHTML;
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}
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return identity;
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};
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let counters = {};
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const newStore = (name) => {
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return initStore(name);
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};
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const get_snapshot_key = (key) => {
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if (key in counters) {
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// eslint-disable-next-line immutable/no-mutation
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counters[key] += 1;
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} else {
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// eslint-disable-next-line immutable/no-mutation
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counters[key] = 1;
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}
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return counters[key];
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};
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const store_snapshot = (store, props = { value, name, path, raiser }) => {
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const fileName = props.name
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.join("_")
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.replace(/ /gi, "-")
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.replace(/\//gi, "-");
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const snapshotPath = Cypress.config("snapshot").snapshotPath || "cypress/snapshots"
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const expectedPath = path.join(snapshotPath, `${fileName}.json`);
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// console.log("\x1b[31m%s\x1b[30m", "file: path", expectedPath);
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cy.task("readFileMaybe", expectedPath).then((exist) => {
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// console.log("\x1b[35m%s\x1b[30m", "file: exists", exist);
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if(exist){
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props.raiser({value: props.value, expected: JSON.parse(exist)})
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} else {
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cy.writeFile(expectedPath, JSON.stringify(props.value))
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}
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});
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};
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const set_snapshot = (store, { snapshotName, snapshotPath, serialized, value }) => {
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if (!store) return; // no store was initialized
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const message = Cypress._.last(snapshotName);
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console.log("Current Snapshot name", snapshotName);
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const devToolsLog = { $el: serialized };
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// console.log({snapshotName, serialized, value})
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if (Cypress.dom.isJquery(value)) {
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devToolsLog.$el = value;
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}
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const options = {
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name: "snapshot",
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message,
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consoleProps: () => devToolsLog,
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};
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if (value) options.$el = value;
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const raiser = ({ value, expected }) => {
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const result = compareValues({ expected, value });
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result.orElse((json) => {
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devToolsLog.message = json.message;
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devToolsLog.expected = expected;
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delete devToolsLog.value;
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devToolsLog.value = value;
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throw new Error(
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`Snapshot Difference. To update, delete snapshot file and rerun test.\n${json.message}`
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);
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});
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};
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Cypress.log(options);
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store_snapshot(store, {
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value,
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name: snapshotName,
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path: snapshotPath,
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raiser,
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});
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};
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const get_test_name = (test) => test.titlePath;
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const get_snapshot_name = (test, custom_name) => {
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const names = get_test_name(test);
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// const key = names.join(" - ");
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const index = custom_name || get_snapshot_key(key);
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names.push(String(index));
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// console.log("names", names)
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if(custom_name) return [custom_name]
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return names;
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};
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module.exports = (value, step, { humanName, snapshotPath, json } = {}) => {
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const snapshotName = get_snapshot_name(Cypress.currentTest, humanName || step);
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const serializer = pickSerializer(json, value);
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const serialized = serializer(value);
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const store = newStore(serialized || {});
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set_snapshot(store, {
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snapshotName,
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snapshotPath,
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serialized,
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value,
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});
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// return undefined;
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};
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9
src/utils/tasks/readFileMaybe.js
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9
src/utils/tasks/readFileMaybe.js
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const fs = require("fs");
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module.exports = (filename) => {
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if (fs.existsSync(filename)) {
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return fs.readFileSync(filename, "utf8");
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}
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return false;
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};
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