Use Jest to test date-fns in Node.js (date-fns#1192) (closes date-fns#875; closes date-fns#1066)

* Setup Jest
* Update Babel and Power Assert
* Make test karma suite work
* Fix multiple it used instead of describe
* Fix accidentally disabled tests
* Upgrade Sinon
* Add Node.js suite to Travis CI
* Remove node_modules from .flowconfig ignore
* Remove console.log from a test
* Use regexp for exception assertion to make it work in any Node.js
* Disable Sauce Connect because it gives me headaches

Author: kossnocorp

.babelrc

@@ -1,4 +1,7 @@
 {
-  "presets": ["es2015", "babel-preset-power-assert"],
+  "presets": [
+    ["@babel/preset-env", { "modules": "commonjs" }],
+    "babel-preset-power-assert"
+  ],
   "plugins": ["add-module-exports"]
 }

.flowconfig

@@ -1,5 +1,4 @@
 [ignore]
-.*node_modules*
 .*examples*
 [options]
 suppress_comment= \\(.\\|\n\\)*\\$ExpectedMistake

.tool-versions

@@ -0,0 +1 @@
+nodejs 10.15.3

.travis.yml

@@ -12,6 +12,7 @@ env:
   - TEST_SUITE=main
   - TEST_SUITE=tz TZ_LENGTH=2 TZ_INDEX=0
   - TEST_SUITE=tz TZ_LENGTH=2 TZ_INDEX=1
+  - TEST_SUITE=node
 
 before_install:
   - export CHROME_BIN=chromium-browser
@@ -39,4 +40,4 @@ cache: yarn
 
 addons:
   chrome: stable
-  sauce_connect: true
+  # sauce_connect: true

config/karma.js

@@ -148,8 +148,8 @@ function config(config) {
       'karma-mocha-reporter',
       'karma-phantomjs-launcher',
       'karma-chrome-launcher',
-      'karma-sauce-launcher',
-      'karma-sinon',
+      // TODO: Make it work
+      // 'karma-sauce-launcher',
       'karma-sourcemap-loader',
       'karma-webpack',
       'karma-benchmark',
@@ -172,7 +172,7 @@ function getFrameworksConfig() {
   if (process.env.TEST_BENCHMARK) {
     return ['benchmark']
   } else {
-    return ['mocha', 'sinon']
+    return ['mocha']
   }
 }
 

jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  verbose: false,
+  setupFiles: ['jest-plugin-context/setup'],
+  testPathIgnorePatterns: ['<rootDir>/test.js']
+}

package.json

@@ -39,13 +39,13 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "babel": "^6.5.2",
-    "babel-cli": "^6.6.5",
-    "babel-eslint": "^8.2.1",
-    "babel-loader": "7.1.5",
-    "babel-plugin-add-module-exports": "^0.2.1",
-    "babel-preset-es2015": "^6.6.0",
-    "babel-preset-power-assert": "^1.0.0",
+    "@babel/cli": "^7.4.4",
+    "@babel/core": "^7.4.5",
+    "@babel/node": "^7.4.5",
+    "@babel/preset-env": "^7.4.5",
+    "babel-loader": "8.0.6",
+    "babel-plugin-add-module-exports": "^1.0.2",
+    "babel-preset-power-assert": "^3.0.0",
     "cloc": "^2.2.0",
     "coveralls": "^3.0.2",
     "firebase": "^3.7.1",
@@ -55,6 +55,8 @@
     "gzip-size-cli": "^1.0.0",
     "husky": "^1.0.0-rc.7",
     "istanbul-instrumenter-loader": "^3.0.1",
+    "jest": "^24.8.0",
+    "jest-plugin-context": "^2.9.0",
     "js-beautify": "^1.5.10",
     "jsdoc-to-markdown": "leshakoss/jsdoc-to-markdown",
     "karma": "^3.0.0",
@@ -68,7 +70,6 @@
     "karma-mocha-reporter": "^2.2.5",
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-sauce-launcher": "^1.2.0",
-    "karma-sinon": "^1.0.4",
     "karma-sourcemap-loader": "^0.3.5",
     "karma-webpack": "^4.0.0-rc.5",
     "lint-staged": "^7.1.1",
@@ -80,7 +81,7 @@
     "node-fetch": "^1.3.3",
     "power-assert": "^1.3.1",
     "prettier": "^1.14.3",
-    "sinon": "^1.17.3",
+    "sinon": "^7.3.2",
     "size-limit": "^0.21.0",
     "snazzy": "^7.0.0",
     "systemjs": "^0.19.39",

scripts/test/node.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# The script runs the test suite using Jest in different Node.js versions.
+#
+# It's a part of the test process.
+
+set -ex
+
+export PATH="$(yarn bin):$PATH"
+
+# Update and source nvm
+curl -o ~/.nvm/nvm.sh https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/nvm.sh
+source ~/.nvm/nvm.sh
+
+for version in 8 9 10 11 12
+do
+  echo "Running tests using Node.js $version"
+  nvm install $version
+  npm rebuild
+  jest
+done

scripts/test/travis.sh

@@ -36,6 +36,10 @@ then
   yarn test-cross-browser
   env TEST_CROSS_BROWSER=true yarn test --single-run
 
+elif [ "$TEST_SUITE" == "node" ]
+then
+  ./scripts/test/node.sh
+
 else
   printf "\n\033[0;31m" "UNKNOWN SUITE!" "\033[0m\n"
   exit 1

src/_lib/protectedTokens/index.js

@@ -12,11 +12,11 @@ export function isProtectedWeekYearToken(token) {
 export function throwProtectedError(token) {
   if (token === 'YYYY') {
     throw new RangeError(
-      'Use `yyyy` instead of `YYYY` for formating years; see: https://git.io/fxCyr'
+      'Use `yyyy` instead of `YYYY` for formatting years; see: https://git.io/fxCyr'
     )
   } else if (token === 'YY') {
     throw new RangeError(
-      'Use `yy` instead of `YY` for formating years; see: https://git.io/fxCyr'
+      'Use `yy` instead of `YY` for formatting years; see: https://git.io/fxCyr'
     )
   } else if (token === 'D') {
     throw new RangeError(