Codeception Acceptance Helper modified to add a saveHtmlSnapshot method

Acceptance.php

<?php

namespace Helper;

// here you can define custom actions
// all public methods declared in helper class will be available in $I

class Acceptance extends \Codeception\Module {

	public function saveHtmlSnapshot( string $snapshot = null ) {
		$responseContent = $this->getModule( 'WPBrowser' )->_getResponseContent();
		$snapshots       = codecept_output_dir( 'snapshots' );

		if ( ! is_dir( $snapshots ) && ! mkdir( $snapshots ) && ! is_dir( $snapshots ) ) {
			throw new \RuntimeException( 'Could not create snapshots dir.' );
		}

		$snapshot = $snapshot ?? date( 'Y-m-d-H-i-s' );
		file_put_contents( $snapshots . '/' . $snapshot . '.html', $responseContent );
	}
}