1 files changed, 275 insertions, 0 deletions
diff --git a/third_party/rust/nom/src/combinator/tests.rs b/third_party/rust/nom/src/combinator/tests.rs
new file mode 100644
index 0000000000..15d32b8aae
--- /dev/null
+++ b/third_party/rust/nom/src/combinator/tests.rs
@@ -0,0 +1,275 @@
+use super::*;
+use crate::bytes::complete::take;
+use crate::bytes::streaming::tag;
+use crate::error::ErrorKind;
+use crate::error::ParseError;
+use crate::internal::{Err, IResult, Needed};
+#[cfg(feature = "alloc")]
+use crate::lib::std::boxed::Box;
+use crate::number::complete::u8;
+
+macro_rules! assert_parse(
+  ($left: expr, $right: expr) => {
+    let res: $crate::IResult<_, _, (_, ErrorKind)> = $left;
+    assert_eq!(res, $right);
+  };
+);
+
+/*#[test]
+fn t1() {
+  let v1:Vec<u8> = vec![1,2,3];
+  let v2:Vec<u8> = vec![4,5,6];
+  let d = Ok((&v1[..], &v2[..]));
+  let res = d.flat_map(print);
+  assert_eq!(res, Ok((&v2[..], ())));
+}*/
+
+#[test]
+fn eof_on_slices() {
+  let not_over: &[u8] = &b"Hello, world!"[..];
+  let is_over: &[u8] = &b""[..];
+
+  let res_not_over = eof(not_over);
+  assert_parse!(
+    res_not_over,
+    Err(Err::Error(error_position!(not_over, ErrorKind::Eof)))
+  );
+
+  let res_over = eof(is_over);
+  assert_parse!(res_over, Ok((is_over, is_over)));
+}
+
+#[test]
+fn eof_on_strs() {
+  let not_over: &str = "Hello, world!";
+  let is_over: &str = "";
+
+  let res_not_over = eof(not_over);
+  assert_parse!(
+    res_not_over,
+    Err(Err::Error(error_position!(not_over, ErrorKind::Eof)))
+  );
+
+  let res_over = eof(is_over);
+  assert_parse!(res_over, Ok((is_over, is_over)));
+}
+
+/*
+#[test]
+fn end_of_input() {
+    let not_over = &b"Hello, world!"[..];
+    let is_over = &b""[..];
+    named!(eof_test, eof!());
+
+    let res_not_over = eof_test(not_over);
+    assert_eq!(res_not_over, Err(Err::Error(error_position!(not_over, ErrorKind::Eof))));
+
+    let res_over = eof_test(is_over);
+    assert_eq!(res_over, Ok((is_over, is_over)));
+}
+*/
+
+#[test]
+fn rest_on_slices() {
+  let input: &[u8] = &b"Hello, world!"[..];
+  let empty: &[u8] = &b""[..];
+  assert_parse!(rest(input), Ok((empty, input)));
+}
+
+#[test]
+fn rest_on_strs() {
+  let input: &str = "Hello, world!";
+  let empty: &str = "";
+  assert_parse!(rest(input), Ok((empty, input)));
+}
+
+#[test]
+fn rest_len_on_slices() {
+  let input: &[u8] = &b"Hello, world!"[..];
+  assert_parse!(rest_len(input), Ok((input, input.len())));
+}
+
+use crate::lib::std::convert::From;
+impl From<u32> for CustomError {
+  fn from(_: u32) -> Self {
+    CustomError
+  }
+}
+
+impl<I> ParseError<I> for CustomError {
+  fn from_error_kind(_: I, _: ErrorKind) -> Self {
+    CustomError
+  }
+
+  fn append(_: I, _: ErrorKind, _: CustomError) -> Self {
+    CustomError
+  }
+}
+
+struct CustomError;
+#[allow(dead_code)]
+fn custom_error(input: &[u8]) -> IResult<&[u8], &[u8], CustomError> {
+  //fix_error!(input, CustomError, alphanumeric)
+  crate::character::streaming::alphanumeric1(input)
+}
+
+#[test]
+fn test_flat_map() {
+  let input: &[u8] = &[3, 100, 101, 102, 103, 104][..];
+  assert_parse!(
+    flat_map(u8, take)(input),
+    Ok((&[103, 104][..], &[100, 101, 102][..]))
+  );
+}
+
+#[test]
+fn test_map_opt() {
+  let input: &[u8] = &[50][..];
+  assert_parse!(
+    map_opt(u8, |u| if u < 20 { Some(u) } else { None })(input),
+    Err(Err::Error((&[50][..], ErrorKind::MapOpt)))
+  );
+  assert_parse!(
+    map_opt(u8, |u| if u > 20 { Some(u) } else { None })(input),
+    Ok((&[][..], 50))
+  );
+}
+
+#[test]
+fn test_map_parser() {
+  let input: &[u8] = &[100, 101, 102, 103, 104][..];
+  assert_parse!(
+    map_parser(take(4usize), take(2usize))(input),
+    Ok((&[104][..], &[100, 101][..]))
+  );
+}
+
+#[test]
+fn test_all_consuming() {
+  let input: &[u8] = &[100, 101, 102][..];
+  assert_parse!(
+    all_consuming(take(2usize))(input),
+    Err(Err::Error((&[102][..], ErrorKind::Eof)))
+  );
+  assert_parse!(
+    all_consuming(take(3usize))(input),
+    Ok((&[][..], &[100, 101, 102][..]))
+  );
+}
+
+#[test]
+#[allow(unused)]
+fn test_verify_ref() {
+  use crate::bytes::complete::take;
+
+  let mut parser1 = verify(take(3u8), |s: &[u8]| s == &b"abc"[..]);
+
+  assert_eq!(parser1(&b"abcd"[..]), Ok((&b"d"[..], &b"abc"[..])));
+  assert_eq!(
+    parser1(&b"defg"[..]),
+    Err(Err::Error((&b"defg"[..], ErrorKind::Verify)))
+  );
+
+  fn parser2(i: &[u8]) -> IResult<&[u8], u32> {
+    verify(crate::number::streaming::be_u32, |val: &u32| *val < 3)(i)
+  }
+}
+
+#[test]
+#[cfg(feature = "alloc")]
+fn test_verify_alloc() {
+  use crate::bytes::complete::take;
+  let mut parser1 = verify(map(take(3u8), |s: &[u8]| s.to_vec()), |s: &[u8]| {
+    s == &b"abc"[..]
+  });
+
+  assert_eq!(parser1(&b"abcd"[..]), Ok((&b"d"[..], (&b"abc").to_vec())));
+  assert_eq!(
+    parser1(&b"defg"[..]),
+    Err(Err::Error((&b"defg"[..], ErrorKind::Verify)))
+  );
+}
+
+#[test]
+#[cfg(feature = "std")]
+fn test_into() {
+  use crate::bytes::complete::take;
+  use crate::{
+    error::{Error, ParseError},
+    Err,
+  };
+
+  let mut parser = into(take::<_, _, Error<_>>(3u8));
+  let result: IResult<&[u8], Vec<u8>> = parser(&b"abcdefg"[..]);
+
+  assert_eq!(result, Ok((&b"defg"[..], vec![97, 98, 99])));
+}
+
+#[test]
+fn opt_test() {
+  fn opt_abcd(i: &[u8]) -> IResult<&[u8], Option<&[u8]>> {
+    opt(tag("abcd"))(i)
+  }
+
+  let a = &b"abcdef"[..];
+  let b = &b"bcdefg"[..];
+  let c = &b"ab"[..];
+  assert_eq!(opt_abcd(a), Ok((&b"ef"[..], Some(&b"abcd"[..]))));
+  assert_eq!(opt_abcd(b), Ok((&b"bcdefg"[..], None)));
+  assert_eq!(opt_abcd(c), Err(Err::Incomplete(Needed::new(2))));
+}
+
+#[test]
+fn peek_test() {
+  fn peek_tag(i: &[u8]) -> IResult<&[u8], &[u8]> {
+    peek(tag("abcd"))(i)
+  }
+
+  assert_eq!(peek_tag(&b"abcdef"[..]), Ok((&b"abcdef"[..], &b"abcd"[..])));
+  assert_eq!(peek_tag(&b"ab"[..]), Err(Err::Incomplete(Needed::new(2))));
+  assert_eq!(
+    peek_tag(&b"xxx"[..]),
+    Err(Err::Error(error_position!(&b"xxx"[..], ErrorKind::Tag)))
+  );
+}
+
+#[test]
+fn not_test() {
+  fn not_aaa(i: &[u8]) -> IResult<&[u8], ()> {
+    not(tag("aaa"))(i)
+  }
+
+  assert_eq!(
+    not_aaa(&b"aaa"[..]),
+    Err(Err::Error(error_position!(&b"aaa"[..], ErrorKind::Not)))
+  );
+  assert_eq!(not_aaa(&b"aa"[..]), Err(Err::Incomplete(Needed::new(1))));
+  assert_eq!(not_aaa(&b"abcd"[..]), Ok((&b"abcd"[..], ())));
+}
+
+#[test]
+fn verify_test() {
+  use crate::bytes::streaming::take;
+
+  fn test(i: &[u8]) -> IResult<&[u8], &[u8]> {
+    verify(take(5u8), |slice: &[u8]| slice[0] == b'a')(i)
+  }
+  assert_eq!(test(&b"bcd"[..]), Err(Err::Incomplete(Needed::new(2))));
+  assert_eq!(
+    test(&b"bcdefg"[..]),
+    Err(Err::Error(error_position!(
+      &b"bcdefg"[..],
+      ErrorKind::Verify
+    )))
+  );
+  assert_eq!(test(&b"abcdefg"[..]), Ok((&b"fg"[..], &b"abcde"[..])));
+}
+
+#[test]
+fn fail_test() {
+  let a = "string";
+  let b = "another string";
+
+  assert_eq!(fail::<_, &str, _>(a), Err(Err::Error((a, ErrorKind::Fail))));
+  assert_eq!(fail::<_, &str, _>(b), Err(Err::Error((b, ErrorKind::Fail))));
+}