/** * Randomly generating strings should be of the correct length and only * contain characters from the specified character set. */ public function testRandomStringOfLengthAndCharacterSet() { // Generate a random string of a small character set $charset = '123'; $random_string = Fluffer::fluffString(10, $charset); // Make sure the generated string only contains the right characters $this->assertStringOnlyContainsCharset($random_string, $charset); }