Notify 473: add code coverage for jest (#488)

.github/workflows/checks.yml

@@ -16,10 +16,22 @@ env:
 
 jobs:
   build:
+    permissions:
+      checks: write
+      pull-requests: write
+      contents: write
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup-project
+      - uses: jwalton/gh-find-current-pr@v1
+        id: findPr
+      - uses: ArtiomTr/jest-coverage-report-action@v2
+        with:
+          test-script: npm test
+          output: report-markdown
+          annotations: failed-tests
+          prnumber: ${{ steps.findPr.outputs.number }}
       - name: Run style checks
         run: pipenv run flake8 .
       - name: Check imports alphabetized

.gitignore

@@ -71,6 +71,7 @@ htmlcov/
 .coverage.*
 .cache
 .pytest_cache
+coverage/
 coverage.xml
 test_results.xml
 *,cover

tests/javascripts/jest.config.js

@@ -1,7 +1,17 @@
 module.exports = {
+  collectCoverage: true,
+  coverageDirectory: './coverage',
+  coverageThreshold: {
+    global: {
+      branches: 75,
+      functions: 90,
+      lines: 90,
+      statements: 90,
+    }
+  },
   setupFiles: ['./support/setup.js'],
   testEnvironment: 'jsdom',
   testEnvironmentOptions: {
     url: 'https://www.notifications.service.gov.uk',
   },
-}
+};