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use super::*;
#[derive(Debug, PartialEq)]
pub struct Expression {
    keyword: grammar::Keyword,
    keyword_data: Vec<String>,
}

impl Expression {
    pub fn new(keyword: String, data: Vec<String>) -> Expression {
        Expression {
            keyword: grammar::unwrap_string(keyword),
            keyword_data: data,
        }
    }
    pub fn get_keyword_value_for_expression(&self) -> i32 {
        self.keyword.value_for_command()
    }
    pub fn get_size_of_keyword_data(&self) -> i32 {
        self.keyword_data.len() as i32
    }
    pub fn parse_expression(&self) {}
    pub fn merge_expressions(&self, _expression_merge: Expression) -> Expression {
        Expression::new(String::from("test"), vec![])
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    #[test]

    fn correct_data_length() {
        let data: Vec<String> = vec![
            String::from("testing"),
            String::from("Testing"),
            String::from("Tetign"),
        ];
        let exp = expression::Expression::new(String::from("SELECT"), data.clone());
        assert_eq!(data.len() as i32, exp.get_size_of_keyword_data());
    }

}