[MM-62409] Generate and publish code coverage for webapp (#31144)

* Generate and publish code coverage for webapp

* Upate coverage output path

* Simplify coverage patterns

* Disable coverage file search

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

.github/codecov.yml

@@ -9,5 +9,8 @@ coverage:
     project:
       default:
         threshold: 1.0
+codecov:
+  notify:
+    after_n_builds: 2 # Server and webapp at this point
 ignore:
   - ^store/storetest.*

.github/workflows/webapp-ci-pr.yml

@@ -18,3 +18,4 @@ concurrency:
 jobs:
   pr-ci:
     uses: ./.github/workflows/webapp-ci-template.yml
+    secrets: inherit

.github/workflows/webapp-ci-template.yml

@@ -75,6 +75,12 @@ jobs:
           NODE_OPTIONS: --max_old_space_size=5120
         run: |
           npm run test-ci
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          disable_search: true
+          files: ./webapp/channels/coverage/lcov.info
 
   build:
     runs-on: ubuntu-22.04

webapp/channels/jest.config.js

@@ -8,15 +8,11 @@ const config = {
     testPathIgnorePatterns: ['/node_modules/'],
     clearMocks: true,
     collectCoverageFrom: [
-        'actions/src/**/*.{js,jsx,ts,tsx}',
-        'client/src/**/*.{js,jsx,ts,tsx}',
-        'components/src/**/*.{jsx,tsx}',
-        'plugins/src/**/*.{js,jsx,ts,tsx}',
-        'reducers/src/**/*.{js,jsx,ts,tsx}',
-        'routes/src/**/*.{js,jsx,ts,tsx}',
-        'selectors/src/**/*.{js,jsx,ts,tsx}',
-        'stores/src/**/*.{js,jsx,ts,tsx}',
-        'utils/src/**/*.{js,jsx,ts,tsx}',
+        'src/**/*.{js,jsx,ts,tsx}',
+    ],
+    coveragePathIgnorePatterns: [
+        '/node_modules/',
+        'mattermost-redux/src/selectors/create_selector',
     ],
     coverageReporters: ['lcov', 'text-summary'],
     fakeTimers: {

webapp/channels/package.json

@@ -192,7 +192,7 @@
     "test:watch": "cross-env TZ=Etc/UTC jest --watch",
     "test:updatesnapshot": "cross-env TZ=Etc/UTC jest --updateSnapshot",
     "test:debug": "cross-env TZ=Etc/UTC jest --forceExit --detectOpenHandles --verbose",
-    "test-ci": "cross-env TZ=Etc/UTC jest --ci --maxWorkers=100%",
+    "test-ci": "cross-env TZ=Etc/UTC jest --ci --maxWorkers=100% --coverage",
     "clean": "rm -rf dist node_modules .eslintcache .stylelintcache tsconfig.tsbuildinfo",
     "stats": "cross-env NODE_ENV=production webpack --profile --json > webpack_stats.json",
     "mmjstool": "mmjstool",