unit-tests: enable code coverage using Istanbul/NYC

.gitignore

@@ -20,3 +20,4 @@ CHANGELOG.html
 .DS_Store
 .direnv
 .tool-versions
+coverage

cspell.config.yaml

@@ -15,3 +15,4 @@ dictionaries:
 ignorePaths:
   - syntaxes/external/*.*
   - media
+  - package.json

package.json

@@ -745,6 +745,7 @@
     "mocha": "^10.2.0",
     "mochawesome": "^7.1.3",
     "mochawesome-report-generator": "^6.2.0",
+    "nyc": "^15.1.0",
     "ovsx": "^0.8.0",
     "prettier": "^3.0.0",
     "react": "^18.2.0",
@@ -794,7 +795,7 @@
     "package": "yarn run webpack && npx vsce package",
     "preinstall": "",
     "pretest": "yarn run compile",
-    "unit-tests": "mocha --recursive test/units",
+    "unit-tests": "nyc --reporter=html --reporter=text --reporter=lcov mocha --recursive test/units",
     "test-ui": "yarn run test-ui-current && yarn run test-ui-oldest",
     "test-ui-current": "extest get-vscode -c max -s out/test-resources && extest get-chromedriver -c max -s out/test-resources && extest install-vsix -f ansible-*.vsix -e out/ext -s out/test-resources && extest install-from-marketplace redhat.vscode-yaml ms-python.python -e out/ext -s out/test-resources && extest run-tests -s out/test-resources -e out/ext --code_settings test/testFixtures/settings.json out/client/test/ui-test/allTestsSuite.js",
     "test-ui-oldest": "extest get-vscode -c min -s out/test-resources && extest get-chromedriver -c min -s out/test-resources && extest install-vsix -f ansible-*.vsix -e out/ext -s out/test-resources && extest install-from-marketplace redhat.vscode-yaml ms-python.python -e out/ext -s out/test-resources && extest run-tests -s out/test-resources -e out/ext --code_settings test/testFixtures/settings.json out/client/test/ui-test/allTestsSuite.js",