summaryrefslogtreecommitdiffstats
path: root/library/std/src/io/cursor/tests.rs
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--library/std/src/io/cursor/tests.rs567
1 files changed, 567 insertions, 0 deletions
diff --git a/library/std/src/io/cursor/tests.rs b/library/std/src/io/cursor/tests.rs
new file mode 100644
index 000000000..d7c203c29
--- /dev/null
+++ b/library/std/src/io/cursor/tests.rs
@@ -0,0 +1,567 @@
+use crate::io::prelude::*;
+use crate::io::{Cursor, IoSlice, IoSliceMut, SeekFrom};
+
+#[test]
+fn test_vec_writer() {
+ let mut writer = Vec::new();
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
+ assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
+ assert_eq!(
+ writer
+ .write_vectored(&[IoSlice::new(&[]), IoSlice::new(&[8, 9]), IoSlice::new(&[10])],)
+ .unwrap(),
+ 3
+ );
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ assert_eq!(writer, b);
+}
+
+#[test]
+fn test_mem_writer() {
+ let mut writer = Cursor::new(Vec::new());
+ writer.set_position(10);
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
+ assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
+ assert_eq!(
+ writer
+ .write_vectored(&[IoSlice::new(&[]), IoSlice::new(&[8, 9]), IoSlice::new(&[10])],)
+ .unwrap(),
+ 3
+ );
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ assert_eq!(&writer.get_ref()[..10], &[0; 10]);
+ assert_eq!(&writer.get_ref()[10..], b);
+}
+
+#[test]
+fn test_mem_writer_preallocated() {
+ let mut writer = Cursor::new(vec![0, 0, 0, 0, 0, 0, 0, 0, 8, 9, 10]);
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
+ assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ assert_eq!(&writer.get_ref()[..], b);
+}
+
+#[test]
+fn test_mem_mut_writer() {
+ let mut vec = Vec::new();
+ let mut writer = Cursor::new(&mut vec);
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
+ assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
+ assert_eq!(
+ writer
+ .write_vectored(&[IoSlice::new(&[]), IoSlice::new(&[8, 9]), IoSlice::new(&[10])],)
+ .unwrap(),
+ 3
+ );
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+ assert_eq!(&writer.get_ref()[..], b);
+}
+
+fn test_slice_writer<T>(writer: &mut Cursor<T>)
+where
+ T: AsRef<[u8]>,
+ Cursor<T>: Write,
+{
+ assert_eq!(writer.position(), 0);
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.position(), 1);
+ assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
+ assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
+ assert_eq!(writer.position(), 8);
+ assert_eq!(writer.write(&[]).unwrap(), 0);
+ assert_eq!(writer.position(), 8);
+
+ assert_eq!(writer.write(&[8, 9]).unwrap(), 1);
+ assert_eq!(writer.write(&[10]).unwrap(), 0);
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8];
+ assert_eq!(writer.get_ref().as_ref(), b);
+}
+
+fn test_slice_writer_vectored<T>(writer: &mut Cursor<T>)
+where
+ T: AsRef<[u8]>,
+ Cursor<T>: Write,
+{
+ assert_eq!(writer.position(), 0);
+ assert_eq!(writer.write_vectored(&[IoSlice::new(&[0])]).unwrap(), 1);
+ assert_eq!(writer.position(), 1);
+ assert_eq!(
+ writer.write_vectored(&[IoSlice::new(&[1, 2, 3]), IoSlice::new(&[4, 5, 6, 7]),]).unwrap(),
+ 7,
+ );
+ assert_eq!(writer.position(), 8);
+ assert_eq!(writer.write_vectored(&[]).unwrap(), 0);
+ assert_eq!(writer.position(), 8);
+
+ assert_eq!(writer.write_vectored(&[IoSlice::new(&[8, 9])]).unwrap(), 1);
+ assert_eq!(writer.write_vectored(&[IoSlice::new(&[10])]).unwrap(), 0);
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7, 8];
+ assert_eq!(writer.get_ref().as_ref(), b);
+}
+
+#[test]
+fn test_box_slice_writer() {
+ let mut writer = Cursor::new(vec![0u8; 9].into_boxed_slice());
+ test_slice_writer(&mut writer);
+}
+
+#[test]
+fn test_box_slice_writer_vectored() {
+ let mut writer = Cursor::new(vec![0u8; 9].into_boxed_slice());
+ test_slice_writer_vectored(&mut writer);
+}
+
+#[test]
+fn test_array_writer() {
+ let mut writer = Cursor::new([0u8; 9]);
+ test_slice_writer(&mut writer);
+}
+
+#[test]
+fn test_array_writer_vectored() {
+ let mut writer = Cursor::new([0u8; 9]);
+ test_slice_writer_vectored(&mut writer);
+}
+
+#[test]
+fn test_buf_writer() {
+ let mut buf = [0 as u8; 9];
+ let mut writer = Cursor::new(&mut buf[..]);
+ test_slice_writer(&mut writer);
+}
+
+#[test]
+fn test_buf_writer_vectored() {
+ let mut buf = [0 as u8; 9];
+ let mut writer = Cursor::new(&mut buf[..]);
+ test_slice_writer_vectored(&mut writer);
+}
+
+#[test]
+fn test_buf_writer_seek() {
+ let mut buf = [0 as u8; 8];
+ {
+ let mut writer = Cursor::new(&mut buf[..]);
+ assert_eq!(writer.position(), 0);
+ assert_eq!(writer.write(&[1]).unwrap(), 1);
+ assert_eq!(writer.position(), 1);
+
+ assert_eq!(writer.seek(SeekFrom::Start(2)).unwrap(), 2);
+ assert_eq!(writer.position(), 2);
+ assert_eq!(writer.write(&[2]).unwrap(), 1);
+ assert_eq!(writer.position(), 3);
+
+ assert_eq!(writer.seek(SeekFrom::Current(-2)).unwrap(), 1);
+ assert_eq!(writer.position(), 1);
+ assert_eq!(writer.write(&[3]).unwrap(), 1);
+ assert_eq!(writer.position(), 2);
+
+ assert_eq!(writer.seek(SeekFrom::End(-1)).unwrap(), 7);
+ assert_eq!(writer.position(), 7);
+ assert_eq!(writer.write(&[4]).unwrap(), 1);
+ assert_eq!(writer.position(), 8);
+ }
+ let b: &[_] = &[1, 3, 2, 0, 0, 0, 0, 4];
+ assert_eq!(buf, b);
+}
+
+#[test]
+fn test_buf_writer_error() {
+ let mut buf = [0 as u8; 2];
+ let mut writer = Cursor::new(&mut buf[..]);
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.write(&[0, 0]).unwrap(), 1);
+ assert_eq!(writer.write(&[0, 0]).unwrap(), 0);
+}
+
+#[test]
+fn test_mem_reader() {
+ let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7]);
+ let mut buf = [];
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+ assert_eq!(reader.position(), 0);
+ let mut buf = [0];
+ assert_eq!(reader.read(&mut buf).unwrap(), 1);
+ assert_eq!(reader.position(), 1);
+ let b: &[_] = &[0];
+ assert_eq!(buf, b);
+ let mut buf = [0; 4];
+ assert_eq!(reader.read(&mut buf).unwrap(), 4);
+ assert_eq!(reader.position(), 5);
+ let b: &[_] = &[1, 2, 3, 4];
+ assert_eq!(buf, b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 3);
+ let b: &[_] = &[5, 6, 7];
+ assert_eq!(&buf[..3], b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn test_mem_reader_vectored() {
+ let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7]);
+ let mut buf = [];
+ assert_eq!(reader.read_vectored(&mut [IoSliceMut::new(&mut buf)]).unwrap(), 0);
+ assert_eq!(reader.position(), 0);
+ let mut buf = [0];
+ assert_eq!(
+ reader.read_vectored(&mut [IoSliceMut::new(&mut []), IoSliceMut::new(&mut buf),]).unwrap(),
+ 1,
+ );
+ assert_eq!(reader.position(), 1);
+ let b: &[_] = &[0];
+ assert_eq!(buf, b);
+ let mut buf1 = [0; 4];
+ let mut buf2 = [0; 4];
+ assert_eq!(
+ reader
+ .read_vectored(&mut [IoSliceMut::new(&mut buf1), IoSliceMut::new(&mut buf2),])
+ .unwrap(),
+ 7,
+ );
+ let b1: &[_] = &[1, 2, 3, 4];
+ let b2: &[_] = &[5, 6, 7];
+ assert_eq!(buf1, b1);
+ assert_eq!(&buf2[..3], b2);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn test_boxed_slice_reader() {
+ let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7].into_boxed_slice());
+ let mut buf = [];
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+ assert_eq!(reader.position(), 0);
+ let mut buf = [0];
+ assert_eq!(reader.read(&mut buf).unwrap(), 1);
+ assert_eq!(reader.position(), 1);
+ let b: &[_] = &[0];
+ assert_eq!(buf, b);
+ let mut buf = [0; 4];
+ assert_eq!(reader.read(&mut buf).unwrap(), 4);
+ assert_eq!(reader.position(), 5);
+ let b: &[_] = &[1, 2, 3, 4];
+ assert_eq!(buf, b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 3);
+ let b: &[_] = &[5, 6, 7];
+ assert_eq!(&buf[..3], b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn test_boxed_slice_reader_vectored() {
+ let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7].into_boxed_slice());
+ let mut buf = [];
+ assert_eq!(reader.read_vectored(&mut [IoSliceMut::new(&mut buf)]).unwrap(), 0);
+ assert_eq!(reader.position(), 0);
+ let mut buf = [0];
+ assert_eq!(
+ reader.read_vectored(&mut [IoSliceMut::new(&mut []), IoSliceMut::new(&mut buf),]).unwrap(),
+ 1,
+ );
+ assert_eq!(reader.position(), 1);
+ let b: &[_] = &[0];
+ assert_eq!(buf, b);
+ let mut buf1 = [0; 4];
+ let mut buf2 = [0; 4];
+ assert_eq!(
+ reader
+ .read_vectored(&mut [IoSliceMut::new(&mut buf1), IoSliceMut::new(&mut buf2)],)
+ .unwrap(),
+ 7,
+ );
+ let b1: &[_] = &[1, 2, 3, 4];
+ let b2: &[_] = &[5, 6, 7];
+ assert_eq!(buf1, b1);
+ assert_eq!(&buf2[..3], b2);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn read_to_end() {
+ let mut reader = Cursor::new(vec![0, 1, 2, 3, 4, 5, 6, 7]);
+ let mut v = Vec::new();
+ reader.read_to_end(&mut v).unwrap();
+ assert_eq!(v, [0, 1, 2, 3, 4, 5, 6, 7]);
+}
+
+#[test]
+fn test_slice_reader() {
+ let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
+ let reader = &mut &in_buf[..];
+ let mut buf = [];
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+ let mut buf = [0];
+ assert_eq!(reader.read(&mut buf).unwrap(), 1);
+ assert_eq!(reader.len(), 7);
+ let b: &[_] = &[0];
+ assert_eq!(&buf[..], b);
+ let mut buf = [0; 4];
+ assert_eq!(reader.read(&mut buf).unwrap(), 4);
+ assert_eq!(reader.len(), 3);
+ let b: &[_] = &[1, 2, 3, 4];
+ assert_eq!(&buf[..], b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 3);
+ let b: &[_] = &[5, 6, 7];
+ assert_eq!(&buf[..3], b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn test_slice_reader_vectored() {
+ let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
+ let reader = &mut &in_buf[..];
+ let mut buf = [];
+ assert_eq!(reader.read_vectored(&mut [IoSliceMut::new(&mut buf)]).unwrap(), 0);
+ let mut buf = [0];
+ assert_eq!(
+ reader.read_vectored(&mut [IoSliceMut::new(&mut []), IoSliceMut::new(&mut buf),]).unwrap(),
+ 1,
+ );
+ assert_eq!(reader.len(), 7);
+ let b: &[_] = &[0];
+ assert_eq!(buf, b);
+ let mut buf1 = [0; 4];
+ let mut buf2 = [0; 4];
+ assert_eq!(
+ reader
+ .read_vectored(&mut [IoSliceMut::new(&mut buf1), IoSliceMut::new(&mut buf2)],)
+ .unwrap(),
+ 7,
+ );
+ let b1: &[_] = &[1, 2, 3, 4];
+ let b2: &[_] = &[5, 6, 7];
+ assert_eq!(buf1, b1);
+ assert_eq!(&buf2[..3], b2);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn test_read_exact() {
+ let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
+ let reader = &mut &in_buf[..];
+ let mut buf = [];
+ assert!(reader.read_exact(&mut buf).is_ok());
+ let mut buf = [8];
+ assert!(reader.read_exact(&mut buf).is_ok());
+ assert_eq!(buf[0], 0);
+ assert_eq!(reader.len(), 7);
+ let mut buf = [0, 0, 0, 0, 0, 0, 0];
+ assert!(reader.read_exact(&mut buf).is_ok());
+ assert_eq!(buf, [1, 2, 3, 4, 5, 6, 7]);
+ assert_eq!(reader.len(), 0);
+ let mut buf = [0];
+ assert!(reader.read_exact(&mut buf).is_err());
+}
+
+#[test]
+fn test_buf_reader() {
+ let in_buf = vec![0, 1, 2, 3, 4, 5, 6, 7];
+ let mut reader = Cursor::new(&in_buf[..]);
+ let mut buf = [];
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+ assert_eq!(reader.position(), 0);
+ let mut buf = [0];
+ assert_eq!(reader.read(&mut buf).unwrap(), 1);
+ assert_eq!(reader.position(), 1);
+ let b: &[_] = &[0];
+ assert_eq!(buf, b);
+ let mut buf = [0; 4];
+ assert_eq!(reader.read(&mut buf).unwrap(), 4);
+ assert_eq!(reader.position(), 5);
+ let b: &[_] = &[1, 2, 3, 4];
+ assert_eq!(buf, b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 3);
+ let b: &[_] = &[5, 6, 7];
+ assert_eq!(&buf[..3], b);
+ assert_eq!(reader.read(&mut buf).unwrap(), 0);
+}
+
+#[test]
+fn seek_past_end() {
+ let buf = [0xff];
+ let mut r = Cursor::new(&buf[..]);
+ assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
+ assert_eq!(r.read(&mut [0]).unwrap(), 0);
+
+ let mut r = Cursor::new(vec![10]);
+ assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
+ assert_eq!(r.read(&mut [0]).unwrap(), 0);
+
+ let mut buf = [0];
+ let mut r = Cursor::new(&mut buf[..]);
+ assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
+ assert_eq!(r.write(&[3]).unwrap(), 0);
+
+ let mut r = Cursor::new(vec![10].into_boxed_slice());
+ assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
+ assert_eq!(r.write(&[3]).unwrap(), 0);
+}
+
+#[test]
+fn seek_past_i64() {
+ let buf = [0xff];
+ let mut r = Cursor::new(&buf[..]);
+ assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
+ assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
+ assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
+ assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
+ assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
+ assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
+
+ let mut r = Cursor::new(vec![10]);
+ assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
+ assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
+ assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
+ assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
+ assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
+ assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
+
+ let mut buf = [0];
+ let mut r = Cursor::new(&mut buf[..]);
+ assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
+ assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
+ assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
+ assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
+ assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
+ assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
+
+ let mut r = Cursor::new(vec![10].into_boxed_slice());
+ assert_eq!(r.seek(SeekFrom::Start(6)).unwrap(), 6);
+ assert_eq!(r.seek(SeekFrom::Current(0x7ffffffffffffff0)).unwrap(), 0x7ffffffffffffff6);
+ assert_eq!(r.seek(SeekFrom::Current(0x10)).unwrap(), 0x8000000000000006);
+ assert_eq!(r.seek(SeekFrom::Current(0)).unwrap(), 0x8000000000000006);
+ assert!(r.seek(SeekFrom::Current(0x7ffffffffffffffd)).is_err());
+ assert_eq!(r.seek(SeekFrom::Current(-0x8000000000000000)).unwrap(), 6);
+}
+
+#[test]
+fn seek_before_0() {
+ let buf = [0xff];
+ let mut r = Cursor::new(&buf[..]);
+ assert!(r.seek(SeekFrom::End(-2)).is_err());
+
+ let mut r = Cursor::new(vec![10]);
+ assert!(r.seek(SeekFrom::End(-2)).is_err());
+
+ let mut buf = [0];
+ let mut r = Cursor::new(&mut buf[..]);
+ assert!(r.seek(SeekFrom::End(-2)).is_err());
+
+ let mut r = Cursor::new(vec![10].into_boxed_slice());
+ assert!(r.seek(SeekFrom::End(-2)).is_err());
+}
+
+#[test]
+fn test_seekable_mem_writer() {
+ let mut writer = Cursor::new(Vec::<u8>::new());
+ assert_eq!(writer.position(), 0);
+ assert_eq!(writer.write(&[0]).unwrap(), 1);
+ assert_eq!(writer.position(), 1);
+ assert_eq!(writer.write(&[1, 2, 3]).unwrap(), 3);
+ assert_eq!(writer.write(&[4, 5, 6, 7]).unwrap(), 4);
+ assert_eq!(writer.position(), 8);
+ let b: &[_] = &[0, 1, 2, 3, 4, 5, 6, 7];
+ assert_eq!(&writer.get_ref()[..], b);
+
+ assert_eq!(writer.seek(SeekFrom::Start(0)).unwrap(), 0);
+ assert_eq!(writer.position(), 0);
+ assert_eq!(writer.write(&[3, 4]).unwrap(), 2);
+ let b: &[_] = &[3, 4, 2, 3, 4, 5, 6, 7];
+ assert_eq!(&writer.get_ref()[..], b);
+
+ assert_eq!(writer.seek(SeekFrom::Current(1)).unwrap(), 3);
+ assert_eq!(writer.write(&[0, 1]).unwrap(), 2);
+ let b: &[_] = &[3, 4, 2, 0, 1, 5, 6, 7];
+ assert_eq!(&writer.get_ref()[..], b);
+
+ assert_eq!(writer.seek(SeekFrom::End(-1)).unwrap(), 7);
+ assert_eq!(writer.write(&[1, 2]).unwrap(), 2);
+ let b: &[_] = &[3, 4, 2, 0, 1, 5, 6, 1, 2];
+ assert_eq!(&writer.get_ref()[..], b);
+
+ assert_eq!(writer.seek(SeekFrom::End(1)).unwrap(), 10);
+ assert_eq!(writer.write(&[1]).unwrap(), 1);
+ let b: &[_] = &[3, 4, 2, 0, 1, 5, 6, 1, 2, 0, 1];
+ assert_eq!(&writer.get_ref()[..], b);
+}
+
+#[test]
+fn vec_seek_past_end() {
+ let mut r = Cursor::new(Vec::new());
+ assert_eq!(r.seek(SeekFrom::Start(10)).unwrap(), 10);
+ assert_eq!(r.write(&[3]).unwrap(), 1);
+}
+
+#[test]
+fn vec_seek_before_0() {
+ let mut r = Cursor::new(Vec::new());
+ assert!(r.seek(SeekFrom::End(-2)).is_err());
+}
+
+#[test]
+#[cfg(target_pointer_width = "32")]
+fn vec_seek_and_write_past_usize_max() {
+ let mut c = Cursor::new(Vec::new());
+ c.set_position(usize::MAX as u64 + 1);
+ assert!(c.write_all(&[1, 2, 3]).is_err());
+}
+
+#[test]
+fn test_partial_eq() {
+ assert_eq!(Cursor::new(Vec::<u8>::new()), Cursor::new(Vec::<u8>::new()));
+}
+
+#[test]
+fn test_eq() {
+ struct AssertEq<T: Eq>(pub T);
+
+ let _: AssertEq<Cursor<Vec<u8>>> = AssertEq(Cursor::new(Vec::new()));
+}
+
+#[allow(dead_code)]
+fn const_cursor() {
+ const CURSOR: Cursor<&[u8]> = Cursor::new(&[0]);
+ const _: &&[u8] = CURSOR.get_ref();
+ const _: u64 = CURSOR.position();
+}
+
+#[bench]
+fn bench_write_vec(b: &mut test::Bencher) {
+ let slice = &[1; 128];
+
+ b.iter(|| {
+ let mut buf = b"some random data to overwrite".to_vec();
+ let mut cursor = Cursor::new(&mut buf);
+
+ let _ = cursor.write_all(slice);
+ test::black_box(&cursor);
+ })
+}
+
+#[bench]
+fn bench_write_vec_vectored(b: &mut test::Bencher) {
+ let slices = [
+ IoSlice::new(&[1; 128]),
+ IoSlice::new(&[2; 256]),
+ IoSlice::new(&[3; 512]),
+ IoSlice::new(&[4; 1024]),
+ IoSlice::new(&[5; 2048]),
+ IoSlice::new(&[6; 4096]),
+ IoSlice::new(&[7; 8192]),
+ IoSlice::new(&[8; 8192 * 2]),
+ ];
+
+ b.iter(|| {
+ let mut buf = b"some random data to overwrite".to_vec();
+ let mut cursor = Cursor::new(&mut buf);
+
+ let mut slices = slices;
+ let _ = cursor.write_all_vectored(&mut slices);
+ test::black_box(&cursor);
+ })
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-05 02:59:08 +0000