Fix prop_ext_[u]int_*::native_endian on BE targets

The similar `big_endian` tests were using an offset to read from the
end of the written `u64`, but the `native_endian` tests were reading
directly, just like the `little_endian` tests.  That's of course only
correct when the target actually is little endian.

That `big_endian` offset is now sliced directly, instead of cloning into
another vector, and then this logic is also used in the `native_endian`
test, depending on the current `#[cfg(target_endian)]`.

Fixes #102.

1 files changed, 8 insertions, 4 deletions

diff --git a/src/lib.rs b/src/lib.rs
index b60fe7c..35c0069 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2865,9 +2865,8 @@ mod stdtests {
                     fn prop(n: $ty_int) -> bool {
                         let mut wtr = vec![];
                         wtr.$write::<BigEndian>(n.clone()).unwrap();
-                        let mut rdr = Vec::new();
-                        rdr.extend(wtr[wtr.len()-$bytes..].iter().map(|&x| x));
-                        let mut rdr = Cursor::new(rdr);
+                        let offset = wtr.len() - $bytes;
+                        let mut rdr = Cursor::new(&mut wtr[offset..]);
                         n == rdr.$read::<BigEndian>($bytes).unwrap()
                     }
                     qc_sized(prop as fn($ty_int) -> bool, $max);
@@ -2889,7 +2888,12 @@ mod stdtests {
                     fn prop(n: $ty_int) -> bool {
                         let mut wtr = vec![];
                         wtr.$write::<NativeEndian>(n.clone()).unwrap();
-                        let mut rdr = Cursor::new(wtr);
+                        let offset = if cfg!(target_endian = "big") {
+                            wtr.len() - $bytes
+                        } else {
+                            0
+                        };
+                        let mut rdr = Cursor::new(&mut wtr[offset..]);
                         n == rdr.$read::<NativeEndian>($bytes).unwrap()
                     }
                     qc_sized(prop as fn($ty_int) -> bool, $max);