Added vitest and broke up components

src/token.test.ts

@@ -0,0 +1,14 @@
+// @vitest-environment jsdom
+
+import { assert, expect, test } from 'vitest'
+import {displayToken} from './token'
+
+test('a 6 digit token is displayed', () => {
+    const token = displayToken('ABCDEFGHIJKLMNOP')
+    expect(token.length).toBe(6)
+})
+
+test('displayed totp token is numeric only', () => {
+    const token = displayToken('ABCDEFGHIJKLMNOP')
+    expect(isNaN(+token)).toBeFalsy()
+})