Add code coverage

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: Unit test & Code coverage
+on: [push]
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Node 16.14.2
+        uses: actions/setup-node@v3
+        with:
+          node-version: 16.14.2
+      - name: Install dependencies
+        run: npm ci
+      - name: Run unit tests and collect coverage
+        run: npm run test:unit
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3

codecov.yml

@@ -0,0 +1,17 @@
+codecov:
+  max_report_age: 30
+  notify:
+    wait_for_ci: false
+github_checks:
+  annotations: false
+coverage:
+  status:
+    project:
+      default:
+        # basic
+        target: auto
+        threshold: 0%
+        base: auto
+comment:
+  layout: 'reach, diff, flags, files'
+  behavior: default

jest.unit.config.js

@@ -0,0 +1,40 @@
+module.exports = {
+	globals: {
+		'ts-jest': {
+			tsconfig: './test/tsconfig.json',
+		},
+	},
+	testMatch: ['<rootDir>/test/**/?(*.)+(spec|test).+(ts|tsx|js)'],
+	setupFilesAfterEnv: ['<rootDir>/test/_setup.js'],
+	transform: {
+		'^.+\\.(ts|tsx)$': 'ts-jest',
+	},
+	verbose: true,
+	collectCoverage: true,
+	coverageReporters: ['text', 'json'],
+	coverageDirectory: '.coverage',
+	/**
+	 * restoreMocks [boolean]
+	 *
+	 * Default: false
+	 *
+	 * Automatically restore mock state between every test.
+	 * Equivalent to calling jest.restoreAllMocks() between each test.
+	 * This will lead to any mocks having their fake implementations removed
+	 * and restores their initial implementation.
+	 */
+	restoreMocks: true,
+	resetMocks: true,
+
+	/**
+	 * resetModules [boolean]
+	 *
+	 * Default: false
+	 *
+	 * By default, each test file gets its own independent module registry.
+	 * Enabling resetModules goes a step further and resets the module registry before running each individual test.
+	 * This is useful to isolate modules for every test so that local module state doesn't conflict between tests.
+	 * This can be done programmatically using jest.resetModules().
+	 */
+	resetModules: true,
+};

package.json

@@ -32,6 +32,7 @@
 		"prebuild": "if test -d dist; then rm -r dist; fi; rm -f tsconfig.tsbuildinfo; rm -f npm-shrinkwrap.json",
 		"build": "tsc",
 		"test": "jest",
+		"test:unit": "jest --config=jest.unit.config.js",
 		"test:coverage": "jest --coverage=true --coverage-reporters=text",
 		"test:ci": "jest --coverage=true --coverage-reporters=json --verbose",
 		"test:stress": "npx ts-node test/scripts/stress_test.ts",

tsconfig.json

@@ -21,5 +21,5 @@
 		"rootDir": "./src",
 		"outDir": "./dist"
 	},
-	"include": ["./src/**/*.ts", "./src/**/*.json"]
+	"include": ["./src/**/*.ts", "./src/**/*.json", "jest.unit.config.js"]
 }