test: Run tests with Jest and collect coverage

.eslintrc.json

@@ -1,3 +1,6 @@
 {
-  "extends": "./node_modules/gts/"
+  "extends": "./node_modules/gts/",
+  "rules": {
+    "@typescript-eslint/no-unused-vars": "error"
+  }
 }

.github/workflows/test.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Build
         run: npm run compile
       - name: LDWorkbench init & test run
-        run: rm -rf ./pipelines && npx ld-workbench --init && npx ld-workbench -c "src/utils/tests/static/single/conf.yml"
+        run: rm -rf ./pipelines && npx ld-workbench --init && npx ld-workbench -c "test/utils/static/single/conf.yml"
       - name: Test
         run: npm run test
       - run: echo "Job status ${{ job.status }}."

.gitignore

@@ -1,3 +1,4 @@
 build/
+coverage/
 node_modules/
 .eslintcache

.npmignore

@@ -1,4 +1,3 @@
-**/tests
 .github
 .husky
 .vscode
@@ -8,4 +7,5 @@ static/ao
 static/figures
 static/tests
 tsconfig.json
+test/
 .eslintrc.json

jest.config.js

@@ -0,0 +1,23 @@
+export default {
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  collectCoverage: true,
+  collectCoverageFrom: [
+    '**/src/**/*.ts', // Include files that are not covered by tests.
+    '!**/src/**/*.d.ts', // Don't show d.ts files on code coverage overview.
+  ],
+  coverageReporters: ['json-summary', 'text'],
+  coverageThreshold: {
+    global: {
+      lines: 65.49,
+      statements: 64.98,
+      branches: 56.08,
+      functions: 71.15,
+    },
+  },
+  transform: {
+    '^.+\\.ts$': '@swc/jest',
+  },
+};