Add specs

mocha + sinon + chai.

ESM + typescript is hard :-/
Editor TS, build TS and spec TS don't want to agree on module imports.
On top of that — Jakefile can not be ESM yet.
So src/ and /spec are modules, and project is not.
--watch won't work unless ran with --parallel

mochajs/mocha#4374
mochajs/mocha-examples#47
https://gist.github.com/jordansexton/2a0c3c360aa700cc9528e89620e82c3d

.mocharc.json

@@ -0,0 +1,10 @@
+{
+  "extension": ["ts", "js"],
+  "spec": ["spec/**/*.spec.ts"],
+  "require": ["jsdom-global/register", "spec/setup.ts"],
+  "node-option": [
+    "no-warnings",
+    "experimental-specifier-resolution=node",
+    "loader=ts-node/esm"
+  ]
+}

package.json

@@ -12,25 +12,41 @@
     "release:firefox": "yarn -s _stash_lint_clean && jake -q firefox && open ./pkg",
     "ch": "DEV=1 jake -q",
     "ff": "DEV=1 jake -q firefox",
-    "tc": "tsc --noEmit",
+    "tsc": "tsc -p ts.src.json",
+    "tc": "yarn -s tsc --noEmit",
     "lint": "yarn -s format:check & p=$! ; yarn -s eslint ||s=1 ; wait $p||s=1 ; exit $s",
-    "eslint": "eslint --fix *.js **/*.ts **/*.ejs.html",
+    "eslint": "eslint --fix *.js src/ spec/ --ext .ts,.ejs.html",
     "format:check": "yarn -s _prettier --check . ||s=1 ; yarn -s _restore ; exit $s",
     "format": "yarn -s _prettier -w . ; yarn -s _restore",
     "_prettier": "p=.prettierignore ; cat $p > .tmp ; cat .gitignore >> $p ; yarn -s prettier -u --loglevel warn",
-    "_restore": "cat .tmp > .prettierignore ; rm .tmp"
+    "_restore": "cat .tmp > .prettierignore ; rm .tmp",
+    "test:watch": "yarn -s test --watch --parallel"
+    "test": "DEV=1 jake config[specs] ; TS_NODE_PROJECT='./ts.spec.json' mocha",
   },
   "devDependencies": {
+    "@types/chai": "^4.3.4",
     "@types/chrome": "^0.0.227",
     "@types/firefox-webext-browser": "^111.0.1",
+    "@types/jsdom": "^21.1.1",
+    "@types/mocha": "^10.0.1",
+    "@types/node": "^18.15.11",
     "@types/offscreencanvas": "^2019.7.0",
+    "@types/sinon": "^10.0.13",
+    "@types/sinon-chai": "^3.2.9",
     "@typescript-eslint/eslint-plugin": "^5.57.0",
     "@typescript-eslint/parser": "^5.57.0",
+    "chai": "^4.3.7",
     "eslint": "^8.32.0",
     "eslint-config-prettier": "^8.6.0",
     "eslint-plugin-lodash-template": "^0.21.0",
+    "jsdom": "^21.1.1",
+    "jsdom-global": "^3.0.2",
     "lodash.template": "^4.5.0",
+    "mocha": "^10.2.0",
     "prettier": "^2.8.3",
+    "sinon": "^15.0.3",
+    "sinon-chai": "^3.7.0",
+    "ts-node": "^10.9.1",
     "typescript": "^5.0.3",
     "uglify-js": "^3.17.4"
   }

spec/helpers.spec.ts

@@ -0,0 +1,115 @@
+import { SinonStub } from 'sinon'
+import { expect } from 'chai'
+
+import { isLocal, getDomain, storage } from '../src/helpers.js'
+
+describe('helpers.ts', () => {
+  it('creates 64x64 canvas and 2d context', () => {
+    const {
+      OffscreenCanvas,
+      OffscreenCanvas: {
+        prototype: { getContext }
+      }
+    } = global
+
+    expect(OffscreenCanvas).to.be.calledOnceWith(64, 64)
+    expect(getContext).to.be.calledOnceWith('2d', {
+      willReadFrequently: true
+    })
+  })
+
+  describe('isLocal', () => {
+    // prettier-ignore
+    const cases = [
+      [true,  'localhost'],
+      [true,  '0.0.0.0'],
+      [false, '0.0.0.1'],
+
+      [true,  '127.0.0.0'],
+      [true,  '127.0.0.1'],
+      [true,  '127.1.1.1'],
+
+      [true,  '10.0.0.1'],
+      [true,  '10.1.1.1'],
+      [true,  '10.0.0.0'],
+
+      [false, '172.15.0.0'],
+      [true,  '172.16.0.0'],
+      [true,  '172.16.100.0'],
+      [true,  '172.31.0.0'],
+      [true,  '172.31.0.0'],
+      [false, '172.32.0.0'],
+
+      [true,  '192.168.0.0'],
+      [false, '192.169.0.0'],
+      [false, '191.168.0.0'],
+
+      [false, '0.0'],
+      [false, undefined],
+      [false, '123'],
+      [false, '127.0.0.0.boop.com'],
+      [false, '10.o.0.0.com'],
+      [false, '8.8.8.8'],
+      [false, 'geo.furman.im'],
+      [false, 'battlestation'],
+    ] as const
+
+    cases.forEach(([expected, ip]) => {
+      it(`${expected ? 'local' : 'global'}\t${ip}`, () => {
+        expect(isLocal(ip)).to.equal(expected)
+      })
+    })
+  })
+
+  describe('getDomain', () => {
+    it('returns domain for http, https and ftp schemes', () => {
+      expect(getDomain('http://boop.doop')).to.eq('boop.doop')
+      expect(
+        getDomain('https://127.0.0.0.boop.com/welp?some=come&utm=sucks')
+      ).to.eq('127.0.0.0.boop.com')
+      expect(getDomain('ftp://scene')).to.eq('scene')
+    })
+
+    it('returns undefined for everything else', () => {
+      expect(getDomain('')).to.be.undefined
+      expect(getDomain(undefined)).to.be.undefined
+      expect(getDomain('gopher://old')).to.be.undefined
+      expect(getDomain('chrome://new-tab')).to.be.undefined
+      expect(getDomain('magnet://h.a.s.h')).to.be.undefined
+    })
+  })
+
+  describe('storage', () => {
+    const { set, get, clear } = global.chrome.storage.local
+    const setStub = set as SinonStub,
+      getStub = get as SinonStub,
+      clearStub = clear as SinonStub
+
+    it('#set', () => {
+      storage.set('boop', { woop: 'shmloop' })
+
+      expect(setStub).to.be.calledOnceWith({
+        boop: { woop: 'shmloop' }
+      })
+    })
+
+    it('#get', async () => {
+      getStub.resolves({
+        'a key': 'valooe',
+        'another key': 'another valooe'
+      })
+
+      expect(await storage.get('but a key')).to.be.undefined
+      expect(await storage.get('a key')).to.eq('valooe')
+      expect(await storage.get('another key')).to.eq('another valooe')
+    })
+
+    it('clears itself when full', async () => {
+      setStub.throws('anything')
+
+      await storage.set('smol', 'but fatal')
+
+      expect(clearStub).to.be.calledOnce
+    })
+  })
+})

spec/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

spec/setup.ts

@@ -0,0 +1,47 @@
+import sinon from 'sinon'
+import chai from 'chai'
+import sinonChai from 'sinon-chai'
+
+/* Matchers */
+
+chai.use(sinonChai)
+
+/* OffscreenCanvas */
+
+const canvasSandbox = sinon.createSandbox({
+  properties: ['spy']
+})
+
+class OffscreenCanvasMock {
+  constructor() {}
+  getContext() {}
+}
+
+canvasSandbox.spy(OffscreenCanvasMock.prototype, 'getContext')
+
+/* chrome.storage.local */
+
+const storageSandbox = sinon.createSandbox({
+  properties: ['stub']
+})
+
+const storageStub = {
+  set: storageSandbox.stub(),
+  get: storageSandbox.stub(),
+  clear: storageSandbox.stub()
+}
+
+/* Assign to window */
+Object.assign(global, {
+  OffscreenCanvas: canvasSandbox.spy(OffscreenCanvasMock),
+  chrome: { storage: { local: storageStub } }
+})
+
+/* Reset call counts hook */
+
+export const mochaHooks = {
+  afterEach() {
+    canvasSandbox.reset()
+    storageSandbox.reset()
+  }
+}

src/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

ts.spec.json

@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+
+  "include": ["spec/**/*"],
+
+  "compilerOptions": {
+    "noEmit": true
+  }
+}

ts.src.json

@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+
+  "include": ["src/**/*"],
+
+  "compilerOptions": {
+    "outDir": "build/"
+  }
+}

tsconfig.json

@@ -1,20 +1,17 @@
 {
-  "include": ["src/**/*"],
-
   "compilerOptions": {
-    "rootDir": "src",
-    "outDir": "build",
-
-    "noErrorTruncation": true,
+    "noErrorTruncation": true, // no (...) in errors
 
+    /* typechecking */
     "strict": true,
     "noUncheckedIndexedAccess": true,
     "noImplicitReturns": true,
+    // do not skipLibCheck, we want our d.ts validated
 
-    // modules
+    /* modules */
+    "moduleResolution": "nodenext", // this makes other peoples d.ts pass
     "esModuleInterop": true,
     "module": "es2022",
-    "target": "es2021",
-    "esModuleInterop": true
+    "target": "es2021"
   }
 }