1 files changed, 116 insertions, 0 deletions
diff --git a/src/stream/tests.rs b/src/stream/tests.rs
new file mode 100644
index 0000000..e653ad9
--- /dev/null
+++ b/src/stream/tests.rs
@@ -0,0 +1,116 @@
+#[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");
+}