General: remove backwards compatibility code now that Jetpack requires WP 5.9

docs/examples/bootstrap.php

@@ -1,12 +1,6 @@
 <?php
 /**
- * PHPUnit bootstrap file to apply WordPress core's monkey-patching to versions
- * of PHPUnit that don't natively support PHP 8.0 for PHP 8.0.
- *
- * WARNING: This is outdated as of September 2021. WordPress is in the midst of
- * updating their stuff to stop being hacky, but have left WP 5.7 and 5.8 in a
- * strange in-between state. Once we only support 5.9+ we should update this
- * for whatever it turns out to be.
+ * PHPUnit bootstrap file.
  *
  * @package automattic/jetpack
  */
@@ -52,31 +46,11 @@
 // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
 echo "Using test root $_tests_dir\n";
 
-// WordPress requires PHPUnit 7.5 or earlier and hacks around a few things to
-// make it work with PHP 8. Unfortunately for MockObjects they do it via
-// composer.json rather than bootstrap.php, so we have to manually do it here.
-if ( version_compare( PHP_VERSION, '8.0', '>=' ) &&
-	( ! class_exists( PHPUnit\Runner\Version::class ) || version_compare( PHPUnit\Runner\Version::id(), '9.3', '<' ) )
-) {
-	if ( ! class_exists( PHPUnit\Framework\MockObject\InvocationMocker::class, false ) &&
-		file_exists( "$_tests_dir/includes/phpunit7/MockObject/InvocationMocker.php" )
-	) {
-		// phpcs:disable WordPressVIPMinimum.Files.IncludingFile.NotAbsolutePath
-		require "$_tests_dir/includes/phpunit7/MockObject/Builder/NamespaceMatch.php";
-		require "$_tests_dir/includes/phpunit7/MockObject/Builder/ParametersMatch.php";
-		require "$_tests_dir/includes/phpunit7/MockObject/InvocationMocker.php";
-		require "$_tests_dir/includes/phpunit7/MockObject/MockMethod.php";
-		// phpcs:enable
-	} else {
-		fprintf(
-			STDOUT,
-			"Warning: PHPUnit <9.3 is not compatible with PHP 8.0+, and the hack could not be loaded.\n  Class %s exists: %s\n  File %s exists: %s\n",
-			PHPUnit\Framework\MockObject\InvocationMocker::class,
-			class_exists( PHPUnit\Framework\MockObject\InvocationMocker::class, false ) ? 'yes (bad)' : 'no (good)',
-			"$_tests_dir/includes/phpunit7/MockObject/InvocationMocker.php",
-			file_exists( "$_tests_dir/includes/phpunit7/MockObject/InvocationMocker.php" ) ? 'yes (good)' : 'no (bad)'
-		);
-	}
+if ( ! is_readable( $_plugin_root . '/vendor/autoload.php' ) ) {
+	echo 'The plugin is not ready for testing.' . PHP_EOL;
+	echo PHP_EOL;
+	echo 'Composer dependencies must be installed.' . PHP_EOL;
+	exit( 1 );
 }
 
 // Give access to tests_add_filter() function.
@@ -96,7 +70,3 @@ function _manually_load_plugin() {
 
 // Load Composer autoloader.
 require $_plugin_root . '/vendor/autoload.php';
-
-// Using the Speed Trap Listener provided by WordPress Core testing suite to expose
-// slowest running tests. See the configuration in phpunit.xml.dist.
-require $_tests_dir . '/includes/listener-loader.php';

docs/monorepo.md

@@ -234,8 +234,7 @@ WordPress plugins generally want to run within WordPress. All monorepo plugins a
 
 Tests will be run against the latest version of WordPress using the variety of supported PHP versions, and against the previous and master versions of WordPress using the PHP version in `.github/versions.sh`. The environment variable `WP_BRANCH` will be set to 'latest', 'previous', or 'master' accordingly. If you have tests that only need to be run once, run them when `WP_BRANCH` is 'latest'.
 
-<!-- @todo: Update this once we drop support for WP 5.8. -->
-Note that the state of WordPress's own PHPUnit integration is currently in flux. For WordPress 5.8 and earlier you need to both use `yoast/phpunit-polyfills` to supply polyfills and need to run with PHPUnit < 8.0 (even on PHP 8, where monkey-patching is required), while for 5.9 you can use `yoast/phpunit-polyfills` normally. Your best bet for the moment is to copy what Jetpack is doing; once the situation has stabilized, we'll update this documentation and [the example bootstrap.php](./examples/bootstrap.php).
+When implementing tests within a new plugin, you can follow the example set in [the example bootstrap.php](./examples/bootstrap.php).
 
 ### JavaScript tests
 

projects/plugins/jetpack/changelog/update-wp-compat-60-rm-old

@@ -0,0 +1,4 @@
+Significance: patch
+Type: compat
+
+General: remove backwards compatibility code now that Jetpack requires WordPress 5.9.

projects/plugins/jetpack/extensions/blocks/button/edit.js

@@ -42,12 +42,6 @@ export function ButtonEdit( props ) {
 
 	usePassthroughAttributes( { attributes, clientId, setAttributes } );
 
-	const onChange = value => {
-		// TODO: Remove `replace` once minimum Gutenberg version is 8.0 (to fully support `disableLineBreaks`)
-		const newValue = 'input' === element ? value.replace( /<br>/gim, ' ' ) : value;
-		setAttributes( { text: newValue } );
-	};
-
 	useEffect( () => {
 		// Reset button width if switching to left or right (floated) alignment for first time.
 		const alignmentChanged = previousAlign !== align;
@@ -98,7 +92,7 @@ export function ButtonEdit( props ) {
 				allowedFormats={ 'input' === element ? [] : undefined }
 				className={ buttonClasses }
 				disableLineBreaks={ 'input' === element }
-				onChange={ onChange }
+				onChange={ value => setAttributes( { text: value } ) }
 				placeholder={ placeholder || __( 'Add text…', 'jetpack' ) }
 				style={ buttonStyles }
 				value={ text }

projects/plugins/jetpack/extensions/blocks/story/player/modal/frame.js

@@ -2,10 +2,12 @@
  * WordPress dependencies
  */
 import { ESCAPE, SPACE } from '@wordpress/keycodes';
-import { useFocusReturn, useConstrainedTabbing, useFocusOnMount } from '@wordpress/compose';
-
-// TODO: replace with `import { useMergeRefs } from '@wordpress/compose';` when package is upgraded to ^3.24.4
-import useMergeRefs from '../lib/use-merge-refs';
+import {
+	useFocusReturn,
+	useConstrainedTabbing,
+	useFocusOnMount,
+	useMergeRefs,
+} from '@wordpress/compose';
 
 export default function ModalFrame( {
 	overlayClassName,

projects/plugins/jetpack/extensions/shared/jetpack-plugin-sidebar.scss

@@ -19,9 +19,7 @@
 }
 
 .edit-post-pinned-plugins {
-	.components-icon-button,    // Gutenberg < 7.2.0. @TODO: Remove once we drop support
-	.components-button.has-icon // Gutenberg >= 7.2.0
-	 {
+	.components-button.has-icon {
 		&:not( .is-toggled ),
 		&:hover,
 		&.is-toggled,

projects/plugins/jetpack/json-endpoints/class.wpcom-json-api-list-users-endpoint.php

@@ -142,12 +142,6 @@ public function callback( $path = '', $blog_id = 0 ) {
 
 		if ( $authors_only ) {
 			$query['capability'] = array( 'edit_posts' );
-			// To-do: remove this once Jetpack requires WordPress 5.9.
-			global $wp_version;
-			if ( version_compare( $wp_version, '5.9-alpha', '<' ) ) {
-				$query['who'] = 'authors';
-				unset( $query['capability'] );
-			}
 		}
 
 		if ( ! empty( $args['search'] ) ) {

projects/plugins/jetpack/modules/shortcodes/slideshow.php

@@ -216,39 +216,20 @@ public function slideshow_js( $attr ) {
 		// Enqueue scripts.
 		$this->enqueue_scripts();
 
-		$output = '';
-
-		if ( defined( 'JSON_HEX_AMP' ) ) {
-			// This is nice to have, but not strictly necessary since we use _wp_specialchars() below.
-			$gallery = wp_json_encode( $attr['gallery'], JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT ); // phpcs:ignore PHPCompatibility
-		} else {
-			$gallery = wp_json_encode( $attr['gallery'] );
-		}
-
-		$output .= '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>';
+		$output = '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>';
 
 		/*
-		 * The input to json_encode() above can contain '&quot;'.
-		 *
-		 * For calls to json_encode() lacking the JSON_HEX_AMP option,
-		 * that '&quot;' is left unaltered.  Running '&quot;' through esc_attr()
-		 * also leaves it unaltered since esc_attr() does not double-encode.
-		 *
-		 * This means we end up with an attribute like
-		 * `data-gallery="{&quot;foo&quot;:&quot;&quot;&quot;}"`,
-		 * which is interpreted by the browser as `{"foo":"""}`,
-		 * which cannot be JSON decoded.
-		 *
-		 * The preferred workaround is to include the JSON_HEX_AMP (and friends)
-		 * options, but these are not available until 5.3.0.
-		 * Alternatively, we can use _wp_specialchars( , , , true ) instead of
-		 * esc_attr(), which will double-encode.
-		 *
-		 * Since we can't rely on JSON_HEX_AMP, we do both.
-		 *
-		 * @todo Update when minimum is PHP 5.3+
+		 * Checking for JSON_HEX_AMP and friends here allows us to get rid of
+		 * '&quot;', that can sometimes be included in the JSON input in some languages like French.
 		 */
-		$gallery_attributes = _wp_specialchars( wp_check_invalid_utf8( $gallery ), ENT_QUOTES, false, true );
+		$gallery_attributes = _wp_specialchars(
+			wp_check_invalid_utf8(
+				wp_json_encode( $attr['gallery'], JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT )
+			),
+			ENT_QUOTES,
+			false,
+			true
+		);
 
 		$output .= sprintf(
 			'<div id="%s" class="jetpack-slideshow-window jetpack-slideshow jetpack-slideshow-%s" data-trans="%s" data-autostart="%s" data-gallery="%s" itemscope itemtype="https://schema.org/ImageGallery"></div>',

projects/plugins/jetpack/modules/widget-visibility/widget-conditions.php

@@ -239,13 +239,6 @@ public static function widget_admin_setup() {
 			'fields'     => array( 'ID', 'display_name' ),
 		);
 
-		// To-do: remove this once Jetpack requires WordPress 5.9.
-		global $wp_version;
-		if ( version_compare( $wp_version, '5.9-alpha', '<' ) ) {
-			$authors_args['who'] = 'authors';
-			unset( $authors_args['capability'] );
-		}
-
 		$authors = get_users( $authors_args );
 
 		foreach ( $authors as $author ) {

projects/plugins/jetpack/modules/widgets/authors.php

@@ -125,13 +125,6 @@ public function widget( $args, $instance ) {
 			)
 		);
 
-		// To-do: remove this once Jetpack requires WordPress 5.9.
-		global $wp_version;
-		if ( version_compare( $wp_version, '5.9-alpha', '<' ) ) {
-			$get_author_params['who'] = 'authors';
-			unset( $get_author_params['capability'] );
-		}
-
 		$authors = get_users( $get_author_params );
 
 		echo $args['before_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped

projects/plugins/jetpack/tests/action-phpunit.sh

@@ -2,5 +2,4 @@
 
 set -eo pipefail
 
-. tests/maybe-downgrade-phpunit.sh
 exec phpunit "$@"

projects/plugins/jetpack/tests/action-test-coverage.sh

@@ -2,8 +2,6 @@
 
 set -eo pipefail
 
-. tests/maybe-downgrade-phpunit.sh
-
 PLUGINDIR="$PWD"
 
 cd "$MONOREPO_BASE/projects/plugins/jetpack"

projects/plugins/jetpack/tests/action-test-php.sh

@@ -2,8 +2,6 @@
 
 set -eo pipefail
 
-. tests/maybe-downgrade-phpunit.sh
-
 echo "::group::Jetpack tests"
 phpunit
 echo "::endgroup::"