29 lines
1.1 KiB
Rust
29 lines
1.1 KiB
Rust
/* lexer/tests/expressions.rs
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* Eryn Wells <eryn@erynwells.me>
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*/
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extern crate sibillexer;
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use sibillexer::{Lexer, Lex, Token};
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#[test]
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fn addition() {
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let mut lex = Lexer::new("(+ 3 4)".chars());
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::LeftParen, "(", 0, 0))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::Id, "+", 0, 1))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::Num(3), "3", 0, 3))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::Num(4), "4", 0, 5))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::RightParen, ")", 0, 6))));
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assert_eq!(lex.next(), None);
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}
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#[test]
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fn subtraction() {
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let mut lex = Lexer::new("(- 3 4)".chars());
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::LeftParen, "(", 0, 0))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::Id, "-", 0, 1))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::Num(3), "3", 0, 3))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::Num(4), "4", 0, 5))));
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assert_eq!(lex.next(), Some(Ok(Lex::new(Token::RightParen, ")", 0, 6))));
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assert_eq!(lex.next(), None);
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}
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