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#[cfg(feature = "std")]
use proptest::prelude::*;
use super::*;
#[test]
fn test_offset_u8() {
let s = b"abcd123";
let a = &s[..];
let b = &a[2..];
let c = &a[..4];
let d = &a[3..5];
assert_eq!(b.offset_from(&a), 2);
assert_eq!(c.offset_from(&a), 0);
assert_eq!(d.offset_from(&a), 3);
}
#[test]
fn test_offset_str() {
let a = "abcřèÂßÇd123";
let b = &a[7..];
let c = &a[..5];
let d = &a[5..9];
assert_eq!(b.offset_from(&a), 7);
assert_eq!(c.offset_from(&a), 0);
assert_eq!(d.offset_from(&a), 5);
}
#[test]
#[cfg(feature = "alloc")]
fn test_bit_stream_empty() {
let i = (&b""[..], 0);
let actual = i.iter_offsets().collect::<crate::lib::std::vec::Vec<_>>();
assert_eq!(actual, vec![]);
let actual = i.eof_offset();
assert_eq!(actual, 0);
let actual = i.peek_token();
assert_eq!(actual, None);
let actual = i.offset_for(|b| b);
assert_eq!(actual, None);
let actual = i.offset_at(1);
assert_eq!(actual, Err(Needed::new(1)));
let (actual_input, actual_slice) = i.peek_slice(0);
assert_eq!(actual_input, (&b""[..], 0));
assert_eq!(actual_slice, (&b""[..], 0, 0));
}
#[test]
#[cfg(feature = "alloc")]
fn test_bit_offset_empty() {
let i = (&b""[..], 0);
let actual = i.offset_from(&i);
assert_eq!(actual, 0);
}
#[cfg(feature = "std")]
proptest! {
#[test]
#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
fn bit_stream(byte_len in 0..20usize, start in 0..160usize) {
bit_stream_inner(byte_len, start);
}
}
#[cfg(feature = "std")]
fn bit_stream_inner(byte_len: usize, start: usize) {
let start = start.min(byte_len * 8);
let start_byte = start / 8;
let start_bit = start % 8;
let bytes = vec![0b1010_1010; byte_len];
let i = (&bytes[start_byte..], start_bit);
let mut curr_i = i;
let mut curr_offset = 0;
while let Some((next_i, _token)) = curr_i.peek_token() {
let to_offset = curr_i.offset_from(&i);
assert_eq!(curr_offset, to_offset);
let (slice_i, _) = i.peek_slice(curr_offset);
assert_eq!(curr_i, slice_i);
let at_offset = i.offset_at(curr_offset).unwrap();
assert_eq!(curr_offset, at_offset);
let eof_offset = curr_i.eof_offset();
let (next_eof_i, eof_slice) = curr_i.peek_slice(eof_offset);
assert_eq!(next_eof_i, (&b""[..], 0));
let eof_slice_i = (eof_slice.0, eof_slice.1);
assert_eq!(eof_slice_i, curr_i);
curr_offset += 1;
curr_i = next_i;
}
assert_eq!(i.eof_offset(), curr_offset);
}
#[test]
fn test_partial_complete() {
let mut i = Partial::new(&b""[..]);
assert!(Partial::<&[u8]>::is_partial_supported());
assert!(i.is_partial(), "incomplete by default");
let incomplete_state = i.complete();
assert!(!i.is_partial(), "the stream should be marked as complete");
i.restore_partial(incomplete_state);
assert!(i.is_partial(), "incomplete stream state should be restored");
}
|
