Monorepo: Restore and add test coverage config (#39961)

* Enable and normalize test coverage commands

* Revert "Code Coverage: remove automation (#28542)"

This reverts commit da5e78803f56ea0fe54f29720c05be037093b97a.

* Revert "Remove remnants of automated code coverage support (#28982)"

This reverts commit 8cc32461b2d3b7e3a4a391c033163e5ebc3822fa.

* Fix starter plugin test broken by #31417

* Plugin tests are now run in the monorepo rather than wp-content/plugins.

* Removed undocumented WP_DEVELOP_DIR variable, documented WORDPRESS_DEVELOP_DIR and WORDPRESS_DIR

* Fixed JS tests in some packages where .scripts.test-js had never been added to composer.json.

---------

Co-authored-by: Brad Jorsch <brad.jorsch@automattic.com>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/11610578911

Upstream-Ref: Automattic/jetpack@7fadf4a

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.0.61-alpha] - unreleased
+
+This is an alpha version! The changes listed here are not final.
+
+### Added
+- Enable test coverage.
+
 ## [2.0.60] - 2024-10-10
 ### Changed
 - Updated package dependencies.
@@ -269,6 +276,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Initial release.
 
+[2.0.61-alpha]: https://github.com/Automattic/i18n-loader-webpack-plugin/compare/v2.0.60...v2.0.61-alpha
 [2.0.60]: https://github.com/Automattic/i18n-loader-webpack-plugin/compare/v2.0.59...v2.0.60
 [2.0.59]: https://github.com/Automattic/i18n-loader-webpack-plugin/compare/v2.0.58...v2.0.59
 [2.0.58]: https://github.com/Automattic/i18n-loader-webpack-plugin/compare/v2.0.57...v2.0.58

composer.json

@@ -5,11 +5,14 @@
 	"license": "GPL-2.0-or-later",
 	"require": {},
 	"require-dev": {
-		"automattic/jetpack-changelogger": "^4.2.7"
+		"automattic/jetpack-changelogger": "^4.2.8-alpha"
 	},
 	"scripts": {
 		"test-js": [
 			"pnpm run test"
+		],
+		"test-coverage": [
+			"pnpm run test-coverage"
 		]
 	},
 	"minimum-stability": "dev",

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@automattic/i18n-loader-webpack-plugin",
-	"version": "2.0.60",
+	"version": "2.0.61-alpha",
 	"description": "A Webpack plugin to load WordPress i18n when Webpack lazy-loads a bundle.",
 	"homepage": "https://github.com/Automattic/jetpack/tree/HEAD/projects/js-packages/i18n-loader-webpack-plugin/#readme",
 	"bugs": {
@@ -14,7 +14,8 @@
 	"license": "GPL-2.0-or-later",
 	"author": "Automattic",
 	"scripts": {
-		"test": "jest tests"
+		"test": "jest tests",
+		"test-coverage": "pnpm run test --coverage --collectCoverageFrom='src/**/*.js' --coverageDirectory=\"$COVERAGE_DIR/js\" --coverageReporters=clover"
 	},
 	"dependencies": {
 		"debug": "^4.3.2"