feat: add coverage generation in test CI (for dd) (#1493)

* feat: add coverage generation in test CI (for dd)

* fix: add missing run keyword for npm script

* fix: add more heap size for ci coverage script

adding coverage makes node run out of memory if not enabled

* feat: update jest packages

* fix: jest OOM by using --runInBand

run serially, don't choke on resources

.github/workflows/ci.yml

@@ -52,10 +52,10 @@ jobs:
           languages: js
           service-name: ${{ secrets.DD_SERVICE_NAME }}
           api-key: ${{ secrets.DD_API_KEY }}
-      - run: npm test
+      - run: npm run test:coverage
         env:
           # Required to allow Datadog to trace Vitest tests
-          NODE_OPTIONS: -r ${{ env.DD_TRACE_PACKAGE }} --import ${{ env.DD_TRACE_ESM_IMPORT }}
+          NODE_OPTIONS: --max-old-space-size=4096 -r ${{ env.DD_TRACE_PACKAGE }}
   gatekeep:
     name: Determine if Build & Deploy is needed
     outputs:

jest.config.js

@@ -1,6 +1,9 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} **/
 module.exports = {
-  preset: 'ts-jest',
   testEnvironment: 'node',
+  transform: {
+    '^.+.tsx?$': ['ts-jest', {}],
+  },
   moduleNameMapper: {
     '^.+\\.(css)$': '<rootDir>/config/css-stub.ts',
   },