78 lines
2.3 KiB
Rust
78 lines
2.3 KiB
Rust
use mps_interpreter::lang::MpsLanguageError;
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use mps_interpreter::tokens::{MpsToken, MpsTokenizer, ParseError};
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use mps_interpreter::*;
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use std::collections::VecDeque;
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use std::io::Cursor;
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#[test]
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fn parse_line() -> Result<(), ParseError> {
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let cursor = Cursor::new("sql(`SELECT * FROM songs;`)");
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let correct_tokens: Vec<MpsToken> = vec![
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MpsToken::Sql,
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MpsToken::OpenBracket,
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MpsToken::Literal("SELECT * FROM songs;".into()),
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MpsToken::CloseBracket,
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];
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let mut tokenizer = MpsTokenizer::new(cursor);
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let mut buf = VecDeque::<MpsToken>::new();
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tokenizer.read_line(&mut buf)?; // operation being tested
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// debug output
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println!("Token buffer:");
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for i in 0..buf.len() {
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println!(" Token #{}: {}", i, &buf[i]);
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}
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// validity tests
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assert_eq!(buf.len(), correct_tokens.len());
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for i in 0..buf.len() {
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assert_eq!(buf[i], correct_tokens[i]);
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}
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tokenizer.read_line(&mut buf)?; // this should immediately return
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Ok(())
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}
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fn execute_single_line(line: &str, should_be_emtpy: bool) -> Result<(), Box<dyn MpsLanguageError>> {
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let cursor = Cursor::new(line);
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let tokenizer = MpsTokenizer::new(cursor);
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let interpreter = MpsInterpretor::with_standard_vocab(tokenizer);
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let mut count = 0;
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for result in interpreter {
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if let Ok(item) = result {
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count += 1;
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if count > 100 {
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continue;
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} // no need to spam the rest of the songs
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println!("Got song `{}` (file: `{}`)", item.title, item.filename);
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} else {
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println!("Got error while iterating (executing)");
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result?;
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}
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}
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if should_be_emtpy {
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assert_eq!(count, 0);
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} else {
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assert_ne!(count, 0); // database is populated
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}
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Ok(())
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}
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#[test]
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fn execute_sql_line() -> Result<(), Box<dyn MpsLanguageError>> {
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execute_single_line("sql(`SELECT * FROM songs ORDER BY artist;`)", false)
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}
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#[test]
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fn execute_simple_sql_line() -> Result<(), Box<dyn MpsLanguageError>> {
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execute_single_line("song(`lov`)", false)
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}
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#[test]
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fn execute_comment_line() -> Result<(), Box<dyn MpsLanguageError>> {
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execute_single_line("// this is a comment", true)?;
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execute_single_line("# this is a special comment", true)
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}
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