Fix PHPUnit test error.

Author: felixarntz

plugins/view-transitions/tests/test-theme.php

@@ -36,6 +36,7 @@ public function test_plvt_load_view_transitions(): void {
 
 		// Test that with theme support it registers and enqueues the style.
 		add_theme_support( 'view-transitions' );
+		plvt_sanitize_view_transitions_theme_support(); // This must be called to sanitize the arguments (normally on 'init').
 		plvt_load_view_transitions();
 		$this->assertTrue( wp_style_is( 'wp-view-transitions', 'registered' ) );
 		$this->assertTrue( wp_style_is( 'wp-view-transitions', 'enqueued' ) );