You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/rust-farm/Practices/sql-parser/src
    
    the code of the file until where you have to start completion: /*
   Çalışmadaki amaç aşağıdaki gibi ifade için AST çıkartacak kodu yazmak.
   AST; Abstract Syntax Tree
   SQL'deki select sorgusu benzeri ifadenin bir tokenize, parse mekanizmalarını ele alıyoruz.
*/

#[derive(Debug
    
    fn valid_expression_with_find_parse_test() {
        let expression = "take id,title,unit_price from products find category_id eq 3";
        let tokens = tokenize(expression);
        let actual = parse(&tokens);
        let expected = TakeCommand {
            source: "products".to_string(),
            fields: vec![
                "id".to_string(),
                "title".to_string(),
                "unit_price".to_string(),
            ],
            find: Some(FindCommand {
                condition: Compare::Eq,
                field: "category_id".to_string(),
                value: "3".to_string(),
            }),
        };
        assert!(actual.is_ok());
        assert_eq!(actual, Ok(expected));
    }