[PR feedback] Switch combine coverage script to .sh

package.json

@@ -34,7 +34,7 @@
     "test-staged": "yarn lint && node scripts/test-staged.js",
     "test-cypress": "cross-env NODE_ENV=cypress_test cypress run-ct",
     "test-cypress-dev": "cross-env NODE_ENV=cypress_test cypress open-ct",
-    "combine-test-coverage": "node ./scripts/combine-coverage.js",
+    "combine-test-coverage": "sh ./scripts/combine-coverage.sh",
     "start-test-server": "BABEL_MODULES=false NODE_ENV=puppeteer NODE_OPTIONS=--max-old-space-size=4096 webpack-dev-server --config src-docs/webpack.config.js --port 9999",
     "yo-component": "yo ./generator-eui/app/component.js",
     "update-token-changelog": "node ./scripts/update-token-changelog.js",

scripts/combine-coverage.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Combines Jest code coverage and Cypress code coverage into a single report %
+# NOTE: `yarn test-cypress` and `yarn test-unit --coverage` must have already been run
+# in order for the correct coverage JSON files to exist and be combined
+
+# Clean folder and re-import Jest/Cypress JSON coverage reports
+rm -rf reports/combined-coverage && mkdir reports/combined-coverage
+cp reports/jest-coverage/coverage-final.json reports/combined-coverage/jest-coverage.json
+cp reports/cypress-coverage/coverage-final.json reports/combined-coverage/cypress-coverage.json
+
+# Tell Istanbul to merge the reports in the folder and generate a HTML report
+yarn nyc merge reports/combined-coverage reports/combined-coverage/coverage-final.json
+yarn nyc report --reporter html --temp-dir reports/combined-coverage --report-dir reports/combined-coverage
+
+# Open the HTML report for convenience
+open reports/combined-coverage/index.html