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pub mod lexer_test {
use std::fmt::Debug;
use logos::Logos;
use crate::error::ParseError;
use crate::lexer::LexIt;
/// ensures the given output is expected
///
/// # Example
/// ```rust
/// use logos::Logos;
/// use crate::parsit::test::lexer_test::expect;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// expect::<T>(
/// "abc, bcs!",
/// vec![T::Word("abc"), T::Comma, T::Word("bcs"), T::Bang]
/// )
/// ```
pub fn expect<'a, T>(src: &'a str, tokens: Vec<T>)
where
T: Logos<'a, Source=str> + Debug + PartialEq,
T::Extras: Default,
{
match LexIt::<T>::new(src) {
Ok(lexer) => assert_eq!(lexer.tokens, tokens),
Err(error) => panic!("the test failed due to error: {:?}", error),
}
}
/// ensures the lexical analysis is done correctly
///
/// # Example
/// ```rust
/// use logos::Logos;
/// use parsit::test::lexer_test::expect_succeed;
/// use crate::parsit::test::lexer_test::expect;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// expect_succeed::<T>("abc, bcs!");
/// ```
pub fn expect_succeed<'a, T>(src: &'a str)
where
T: Logos<'a, Source=str> + PartialEq,
T::Extras: Default,
{
match LexIt::<T>::new(src) {
Ok(_) => (),
Err(error) => panic!("the test failed due to an error: {:?}", error),
}
}
/// ensures the lexical analysis is failed
///
/// # Example
/// ```rust
/// use logos::Logos;
/// use parsit::test::lexer_test::{expect_failed, expect_succeed};
/// use crate::parsit::test::lexer_test::expect;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// expect_failed::<T>("abc, bcs >> !");
/// ```
pub fn expect_failed<'a, T>(src: &'a str)
where
T: Logos<'a, Source=str> + PartialEq,
T::Extras: Default,
{
if LexIt::<T>::new(src).is_ok() {
panic!("the test failed due to expectation to get an error but tokens have been parsed")
}
}
/// ensures the lexical analysis is failed with a proper error
///
/// # Example
/// ```rust
/// use logos::Logos;
/// use parsit::test::lexer_test::{expect_failed_with, expect_succeed};
/// use crate::parsit::test::lexer_test::expect;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// expect_failed_with::<T,_>("abc, bcs > !", |e| e.is_bad_token_on(">") );
/// ```
pub fn expect_failed_with<'a, T, Error>(src: &'a str, error: Error)
where
T: Logos<'a, Source=str> + PartialEq,
T::Extras: Default,
Error: FnOnce(ParseError<'a>)
{
match LexIt::<T>::new(src) {
Ok(_) => panic!("the test failed due to expectation to get an error but tokens have been parsed"),
Err(e) => error(e),
}
}
impl<'a> ParseError<'a> {
pub fn is_bad_token_on(&self, src: &'a str) {
if let ParseError::BadToken(s, _) = &self {
assert_eq!(*s, src)
}
}
}
}
pub mod parser_test {
use std::fmt::Debug;
use logos::Logos;
use crate::parser::ParseIt;
use crate::step::Step;
/// Creates an internal parser or panicking otherwise
pub fn parsit<'a, T>(src: &'a str) -> ParseIt<T>
where
T: Logos<'a, Source=str> + Debug + PartialEq,
T::Extras: Default,
{
match ParseIt::new(src) {
Ok(p) => p,
Err(e) => panic!("Some error popped up in lexing, namely {:?}", e),
}
}
/// Asserts a step value with a given one
/// # Example
/// ```rust
/// use logos::Logos;
/// use parsit::test::parser_test::expect;
/// use crate::parsit::test::parser_test::*;
/// use crate::parsit::token;
/// use crate::parsit::parser::ParseIt;
/// use crate::parsit::step::Step;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// let p = parsit("abc!");
/// let bang = |pos:usize| token!(p.token(pos) => T::Bang => "!");
/// let word = |pos:usize| token!(p.token(pos) => T::Word(v) => *v);
/// let step =
/// word(0)
/// .then_or_val_zip(bang, "")
/// .map(|(a,b)| format!("{}{}",a,b));
///
/// expect(step,"abc!".to_string());
/// ```
pub fn expect<T>(res: Step<T>, expect: T)
where
T: PartialEq + Debug,
{
match res {
Step::Success(v, _) => assert_eq!(v, expect),
Step::Fail(pos) => panic!("A step failed on a position {}", pos),
Step::Error(e) => panic!("A step finished with an error {:?}", e),
}
}
/// Asserts a step value with success state and the position is expected as well
/// # Example
/// ```rust
/// use logos::Logos;
/// use crate::parsit::test::parser_test::expect_pos;
/// use crate::parsit::test::parser_test::parsit;
/// use crate::parsit::token;
/// use crate::parsit::parser::ParseIt;
/// use crate::parsit::step::Step;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// let p = parsit("abc!");
/// let bang = |pos:usize| token!(p.token(pos) => T::Bang => "!");
/// let word = |pos:usize| token!(p.token(pos) => T::Word(v) => v);
/// let step =word(0).then_or_val_zip(bang, "");
///
/// expect_pos(step,2); // the next position to parse
/// ```
pub fn expect_pos<T>(res: Step<T>, expect: usize) {
match res {
Step::Success(_, pos) => assert_eq!(pos, expect),
Step::Fail(pos) => panic!("A step failed on a position {}", pos),
Step::Error(e) => panic!("A step finished with an error {:?}", e),
}
}
/// Asserts a step value with a fail.
/// Fail is related only on the fail in the given rule in a step.
/// # Example
/// ```rust
/// use logos::Logos;
/// use crate::parsit::test::parser_test::fail;
/// use crate::parsit::test::parser_test::parsit;
/// use crate::parsit::token;
/// use crate::parsit::parser::ParseIt;
/// use crate::parsit::step::Step;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
/// #[token(">")]
/// Gt,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// let p = parsit("abc>!");
/// let bang = |pos:usize| token!(p.token(pos) => T::Bang => "!");
/// let word = |pos:usize| token!(p.token(pos) => T::Word(v) => v);
/// let step =word(0).then_zip(bang);
///
/// fail(step);
/// ```
pub fn fail<T>(res: Step<T>) {
match res {
Step::Success(_, pos) => {
panic!("A step should failed but successes on a position {}", pos)
}
Step::Fail(_) => (),
Step::Error(e) => panic!("A step should failed but errored with an error {:?}", e),
}
}
/// Asserts a step value with a fail on an expected position
/// Fail is related only on the fail in the given rule in a step.
/// # Example
/// ```rust
/// use logos::Logos;
/// use crate::parsit::test::parser_test::fail_on;
/// use crate::parsit::test::parser_test::parsit;
/// use crate::parsit::token;
/// use crate::parsit::parser::ParseIt;
/// use crate::parsit::step::Step;
///
/// #[derive(Logos, Debug, PartialEq)]
/// pub enum T<'a> {
/// #[regex(r"[a-zA-Z-]+")]
/// Word(&'a str),
///
/// #[token(",")]
/// Comma,
/// #[token(".")]
/// Dot,
///
/// #[token("!")]
/// Bang,
/// #[token("?")]
/// Question,
/// #[token(">")]
/// Gt,
///
/// #[regex(r"[ \t\r\n]+", logos::skip)]
/// Whitespace,
/// #[error]
/// Error,
/// }
/// let p = parsit("abc>!");
/// let bang = |pos:usize| token!(p.token(pos) => T::Bang => "!");
/// let word = |pos:usize| token!(p.token(pos) => T::Word(v) => v);
/// let step =word(0).then_zip(bang);
///
/// fail_on(step,1);
/// ```
pub fn fail_on<T>(res: Step<T>, expect: usize) {
match res {
Step::Success(_, pos) => {
panic!("A step should failed but successes on a position {}", pos)
}
Step::Fail(pos) => assert_eq!(pos, expect),
Step::Error(e) => panic!("A step should failed but errored with an error {:?}", e),
}
}
}