Automatically install WooCommerce into the test environment if it isn't already present.

Author: stevegrunwell

tests/bootstrap.php

@@ -30,3 +30,61 @@ function _manually_load_plugin() {
 // Start up the WP testing environment.
 require $_tests_dir . '/includes/bootstrap.php';
 require __DIR__ . '/testcase.php';
+
+/*
+ * Automatically activate WooCommerce in the test environment.
+ *
+ * If WooCommerce cannot be activated, an error message will be thrown and the test execution
+ * halted, with a non-zero exit code.
+ */
+$activated = activate_plugin( 'woocommerce/woocommerce.php' );
+
+// If the issue is that the plugin isn't installed, attempt to install it.
+if ( is_wp_error( $activated ) && 'plugin_not_found' === $activated->get_error_code() ) {
+	include_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';
+
+	echo PHP_EOL . "WooCommerce is not currently installed in the test environment, attempting to install...";
+
+	// Retrieve information about WooCommerce.
+	$plugin_data = wp_remote_get( 'https://api.wordpress.org/plugins/info/1.0/woocommerce.json' );
+
+	if ( ! is_wp_error( $plugin_data ) ) {
+		$plugin_data = json_decode( wp_remote_retrieve_body( $plugin_data ) );
+		$plugin_url  = $plugin_data->download_link;
+	} else {
+		$plugin_url = false;
+	}
+
+	// Download the plugin from the WordPress.org repository.
+	$upgrader  = new Plugin_Upgrader( new Automatic_Upgrader_Skin() );
+	$installed = $upgrader->install( $plugin_url );
+
+	if ( true === $installed ) {
+		echo "\033[0;32mOK\033[0;m" . PHP_EOL . PHP_EOL;
+	} else {
+		echo "\033[0;31mFAIL\033[0;m" . PHP_EOL;
+
+		if ( is_wp_error( $installed ) ) {
+			printf( 'Unable to install WooCommerce: %s.', $installed->get_error_message() );
+		}
+
+		printf(
+			'Please download and install WooCommerce into %s' . PHP_EOL,
+			trailingslashit(dirname( dirname( $_tests_dir ) ) )
+		);
+
+		exit( 1 );
+	}
+
+	// Try once again to activate.
+	$activated = activate_plugin( 'woocommerce/woocommerce.php' );
+}
+
+// Nothing more we can do, unfortunately.
+if ( is_wp_error( $activated ) ) {
+	echo PHP_EOL . 'WooCommerce could not automatically be activated in the test environment:';
+	echo PHP_EOL . $activated->get_error_message();
+	echo PHP_EOL . PHP_EOL . "\033[0;31mUnable to proceed with tests, aborting.\033[0m";
+	echo PHP_EOL;
+	exit( 1 );
+}