Eryn Wells
c14c939ad3
As ListParser sees items within its list, it assembles a vector of Pairs. When the parser encounters ')', it assembles the pairs into an actual linked list and returns the root Pair. This work also revealed that I was asserting incorrectly in my single_pair test. It should return Null instead of an empty Pair. Neat. Closes #17.
41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
/* parser/tests/single_item.rs
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* Eryn Wells <eryn@erynwells.me>
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*/
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//! Tests that the parser can handle inputs of single tokens.
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extern crate sibillexer;
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extern crate sibilparser;
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extern crate sibiltypes;
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use sibillexer::{Lex, Token};
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use sibillexer::Result as LexerResult;
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use sibilparser::Parser;
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use sibiltypes::{Bool, Obj, Pair, Sym};
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#[test]
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fn single_sym() {
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let lex: LexerResult = Ok(Lex::new(Token::Id, "abc", 0, 0));
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let tokens = vec![lex].into_iter();
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let mut parser = Parser::new(tokens);
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assert_eq!(parser.next(), Some(Ok(Obj::new(Sym::with_str("abc")))));
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assert_eq!(parser.next(), None);
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}
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#[test]
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fn single_pair() {
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let tokens = vec![Ok(Lex::new(Token::LeftParen, "(", 0, 0)),
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Ok(Lex::new(Token::RightParen, ")", 0, 0))].into_iter();
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let mut parser = Parser::new(tokens);
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assert_eq!(parser.next(), Some(Ok(Obj::Null)));
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assert_eq!(parser.next(), None);
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}
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#[test]
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fn single_bool() {
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let lex: LexerResult = Ok(Lex::new(Token::Bool(true), "#t", 0, 0));
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let tokens = vec![lex].into_iter();
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let mut parser = Parser::new(tokens);
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assert_eq!(parser.next(), Some(Ok(Obj::new(Bool::True))));
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assert_eq!(parser.next(), None);
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}
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