wordpress-develop/tests/phpunit/tests/formatting/SanitizeFileName.php

<?php

/**
 * @group formatting
 */
class Tests_Formatting_SanitizeFileName extends WP_UnitTestCase {
	function test_munges_extensions() {
		# r17990
		$file_name = sanitize_file_name( 'test.phtml.txt' );
		$this->assertEquals( 'test.phtml_.txt', $file_name );
	}

	function test_removes_special_chars() {
		$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0));
		$string = 'test';
		foreach ( $special_chars as $char )
			$string .= $char;
		$string .= 'test';
		$this->assertEquals( 'testtest', sanitize_file_name( $string ) );
	}

	function test_replaces_any_number_of_hyphens_with_one_hyphen() {
		$this->assertEquals("a-t-t", sanitize_file_name("a----t----t"));
	}

	function test_trims_trailing_hyphens() {
		$this->assertEquals("a-t-t", sanitize_file_name("a----t----t----"));
	}

	function test_replaces_any_amount_of_whitespace_with_one_hyphen() {
		$this->assertEquals("a-t", sanitize_file_name("a          t"));
		$this->assertEquals("a-t", sanitize_file_name("a    \n\n\nt"));
	}
}