Shard unit test runs (#39302)

closes #38973

.github/workflows/ci.yml

@@ -28,11 +28,20 @@ jobs:
             matrix:
                 php: ['7.4', '8.0']
                 wp: ['latest']
+                unittests: ['shard1', 'shard2']
                 include:
                     - wp: nightly
                       php: '7.4'
+                      unittests: 'shard1'
+                    - wp: nightly
+                      php: '7.4'
+                      unittests: 'shard2'
                     - wp: '6.1'
                       php: 7.4
+                      unittests: 'shard1'
+                    - wp: '6.1'
+                      php: 7.4
+                      unittests: 'shard2'
         services:
             database:
                 image: mysql:5.6
@@ -78,4 +87,4 @@ jobs:
               env:
                 WP_ENV_CORE: ${{ steps.parseMatrix.outputs.wpVersion }}
                 WP_ENV_PHP_VERSION: ${{ matrix.php }}
-              run: pnpm --filter=woocommerce test:unit:env
+              run: pnpm --filter=woocommerce test:unit:env --testsuite ${{ matrix.unittests }}

.github/workflows/pr-unit-tests.yml

@@ -28,14 +28,28 @@ jobs:
             matrix:
                 php: ['7.4', '8.0']
                 wp: ['latest']
+                unittests: ['shard1', 'shard2']
                 include:
                     - wp: nightly
                       php: '7.4'
+                      unittests: 'shard1'
+                    - wp: nightly
+                      php: '7.4'
+                      unittests: 'shard2'
                     - wp: '6.1'
                       php: 7.4
+                      unittests: 'shard1'
+                    - wp: '6.1'
+                      php: 7.4
+                      unittests: 'shard2'
                     - wp: 'latest'
                       php: '7.4'
                       hpos: true
+                      unittests: 'shard1'
+                    - wp: 'latest'
+                      php: '7.4'
+                      hpos: true
+                      unittests: 'shard2'
         services:
             database:
                 image: mysql:5.6
@@ -72,4 +86,4 @@ jobs:
               env:
                 WP_ENV_CORE: ${{ steps.parseMatrix.outputs.wpVersion }}
                 WP_ENV_PHP_VERSION: ${{ matrix.php }}
-              run: pnpm --filter=woocommerce test:unit:env
+              run: pnpm --filter=woocommerce test:unit:env --testsuite ${{ matrix.unittests }}

plugins/woocommerce/changelog/dev-shard-unit-tests

@@ -0,0 +1,4 @@
+Significance: minor
+Type: dev
+
+Shard the unit tests running on GitHub Actions.

plugins/woocommerce/phpunit.xml

@@ -9,10 +9,18 @@
 	verbose="true"
 	xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
 	<testsuites>
-		<testsuite name="WooCommerce Test Suite">
+		<testsuite name="wc-unittests-all">
 			<directory suffix=".php">./tests/legacy/unit-tests</directory>
 			<directory suffix=".php">./tests/php</directory>
 		</testsuite>
+		<testsuite name="shard1">
+			<directory suffix=".php">./tests/legacy/unit-tests</directory>
+			<directory suffix=".php">./tests/php</directory>
+			<exclude>./tests/legacy/unit-tests/woocommerce-admin</exclude>
+		</testsuite>
+		<testsuite name="shard2">
+			<directory suffix=".php">./tests/legacy/unit-tests/woocommerce-admin</directory>
+		</testsuite>
 	</testsuites>
 	<coverage includeUncoveredFiles="true">
 		<include>

plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/features/class-wc-tests-ces-tracks.php

@@ -7,10 +7,19 @@
 
 use Automattic\WooCommerce\Internal\Admin\CustomerEffortScoreTracks;
 
-// CustomerEffortScoreTracks only works in wp-admin, so let's fake it.
-class CurrentScreenMock {
-	public function in_admin() {
-	    return true;
+// phpcs:disable Generic.Files.OneObjectStructurePerFile.MultipleFound
+
+if ( ! class_exists( 'CurrentScreenMock' ) ) {
+	/**
+	 * Class CurrentScreenMock
+	 */
+	class CurrentScreenMock {
+		/**
+		 * CustomerEffortScoreTracks only works in wp-admin, so let's fake it.
+		 */
+		public function in_admin() {
+			return true;
+		}
 	}
 }
 
@@ -42,7 +51,7 @@ class WC_Admin_Tests_CES_Tracks extends WC_Unit_Test_Case {
 	}
 
 	public function tearDown(): void {
-	    parent::tearDown();
+		parent::tearDown();
 		if ( $this->current_screen_backup ) {
 			$GLOBALS['current_screen'] = $this->current_screen_backup;
 		}

plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/reports/class-wc-tests-reports-orders-stats.php

@@ -666,8 +666,12 @@ class WC_Admin_Tests_Reports_Orders_Stats extends WC_Unit_Test_Case {
 			$orders[] = $order;
 		}
 
+		$this->assertEquals( 15, count( WC_Helper_Queue::get_all_pending() ) );
+
 		WC_Helper_Queue::run_all_pending();
 
+		$this->assertEquals( 0, count( WC_Helper_Queue::get_all_pending() ) );
+
 		$data_store = new OrdersStatsDataStore();
 
 		// Test for the current hour.

plugins/woocommerce/tests/php/includes/class-wc-orders-tracking-test.php

@@ -1,5 +1,21 @@
 <?php
 
+// phpcs:disable Generic.Files.OneObjectStructurePerFile.MultipleFound
+
+if ( ! class_exists( 'CurrentScreenMock' ) ) {
+	/**
+	 * Class CurrentScreenMock
+	 */
+	class CurrentScreenMock {
+		/**
+		 * CustomerEffortScoreTracks only works in wp-admin, so let's fake it.
+		 */
+		public function in_admin() {
+			return true;
+		}
+	}
+}
+
 /**
  * Class WC_Orders_Tracking_Test.
  */