Build/Test Tools: Only require the WordPress Importer plugin when run…

…ning core tests.

This allows other users of the WordPress unit test suite framework to run their own unit tests without needing the WordPress Importer plugin, which should only be a requirement if running core tests.

Follow-up to [59085].

Props bjorsch.
Fixes #62106.

git-svn-id: https://develop.svn.wordpress.org/trunk@59086 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/includes/bootstrap.php

@@ -216,7 +216,7 @@
 define( 'DIR_TESTROOT', realpath( dirname( __DIR__ ) ) );
 define( 'IMPORTER_PLUGIN_FOR_TESTS', DIR_TESTDATA . '/plugins/wordpress-importer/wordpress-importer.php' );
 
-if ( ! file_exists( IMPORTER_PLUGIN_FOR_TESTS ) ) {
+if ( defined( 'WP_RUN_CORE_TESTS' ) && WP_RUN_CORE_TESTS && ! file_exists( IMPORTER_PLUGIN_FOR_TESTS ) ) {
 	echo 'The test suite requires the WordPress Importer plugin to be available in the `/data/plugins/` directory.'
 		. ' See: https://make.wordpress.org/core/handbook/contribute/git/#unit-tests' . PHP_EOL,
 	exit( 1 );