Add testing

Signed-off-by: John Molakvoæ <[email protected]>

.github/workflows/node.yml

@@ -51,3 +51,7 @@ jobs:
         run: |
           git status
           git --no-pager diff
+
+      - name: Testing
+        run: |
+          npm run test --if-present

jest.config.js

@@ -0,0 +1,24 @@
+const esModules = ['p-limit', 'yocto-queue'].join('|')
+
+module.exports = {
+	preset: 'ts-jest',
+	moduleFileExtensions: ['js', 'vue', 'ts'],
+	collectCoverageFrom: [
+		'src/**/*.{js,vue}',
+		'!**/node_modules/**',
+	],
+	coverageReporters: [
+		'html',
+		'text-summary',
+	],
+	setupFilesAfterEnv: [
+		'<rootDir>/tests/setup.js',
+	],
+	testEnvironment: 'jsdom',
+	transform: {
+		'^.+\\.ts$': 'ts-jest',
+		'^.+\\.js$': 'babel-jest',
+		'^.+\\.vue$': '@vue/vue2-jest',
+	},
+	transformIgnorePatterns: [`/node_modules/(?!${esModules})`],
+}