Test keyring vault encryption

Introduce Jest as our test runner.

background/tests/keyring-persistence.test.ts

@@ -0,0 +1,37 @@
+import { webcrypto } from "crypto"
+import { encryptVault, decryptVault } from "../services/keyring/encryption"
+
+beforeEach(() => {
+  // polyfill the WebCrypto API
+  global.crypto = webcrypto as unknown as Crypto
+})
+
+afterEach(() => {
+  delete global.crypto
+})
+
+test("can encrypt a vault", async () => {
+  const vault = { a: 1 }
+  const password = "this-is-a-poor-password"
+  await encryptVault(vault, password)
+})
+
+test("can decrypt an encrypted vault", async () => {
+  const vault = { a: 1 }
+  const password = "this-is-a-poor-password"
+  const encryptedVault = await encryptVault(vault, password)
+
+  const newVault = await decryptVault(encryptedVault, password)
+
+  expect(newVault).toEqual(vault)
+})
+
+test("can decrypt a complex encrypted vault", async () => {
+  const vault = { a: { b: [1, 2, 3] }, c: null, d: 123 }
+  const password = "this-is-a-poor-password"
+  const encryptedVault = await encryptVault(vault, password)
+
+  const newVault = await decryptVault(encryptedVault, password)
+
+  expect(newVault).toEqual(vault)
+})

package.json

@@ -28,7 +28,7 @@
     "lint:docs:fix": "prettier -w '**/*.md'",
     "lint:js": "eslint .",
     "lint:js:fix": "eslint . --fix",
-    "test": "echo \"nothing to do\""
+    "test": "jest"
   },
   "workspaces": [
     "ui",
@@ -52,6 +52,7 @@
     "@types/archiver": "^5.1.0",
     "@types/copy-webpack-plugin": "^8.0.0",
     "@types/firefox-webext-browser": "^82.0.0",
+    "@types/jest": "^27.0.2",
     "@types/terser-webpack-plugin": "^5.0.3",
     "@types/webpack-livereload-plugin": "^2.3.2",
     "@typescript-eslint/eslint-plugin": "^4.28.4",
@@ -73,6 +74,7 @@
     "eslint-plugin-react-hooks": "^4.2.0",
     "fork-ts-checker-webpack-plugin": "^6.3.2",
     "install": "^0.13.0",
+    "jest": "^27.2.2",
     "npm": "^7.5.6",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.3.2",

tests/integration.test.ts

@@ -0,0 +1,4 @@
+// This would be a fantastic spot for an integration test!
+test("adds 1 + 2 to equal 3", () => {
+  expect(1 + 2).toBe(3)
+})