diff options
Diffstat (limited to 'third_party/rust/tokio/tests/io_read_line.rs')
-rw-r--r-- | third_party/rust/tokio/tests/io_read_line.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/third_party/rust/tokio/tests/io_read_line.rs b/third_party/rust/tokio/tests/io_read_line.rs new file mode 100644 index 0000000000..57ae37cef3 --- /dev/null +++ b/third_party/rust/tokio/tests/io_read_line.rs @@ -0,0 +1,29 @@ +#![warn(rust_2018_idioms)] +#![cfg(feature = "full")] + +use tokio::io::AsyncBufReadExt; +use tokio_test::assert_ok; + +use std::io::Cursor; + +#[tokio::test] +async fn read_line() { + let mut buf = String::new(); + let mut rd = Cursor::new(b"hello\nworld\n\n"); + + let n = assert_ok!(rd.read_line(&mut buf).await); + assert_eq!(n, 6); + assert_eq!(buf, "hello\n"); + buf.clear(); + let n = assert_ok!(rd.read_line(&mut buf).await); + assert_eq!(n, 6); + assert_eq!(buf, "world\n"); + buf.clear(); + let n = assert_ok!(rd.read_line(&mut buf).await); + assert_eq!(n, 1); + assert_eq!(buf, "\n"); + buf.clear(); + let n = assert_ok!(rd.read_line(&mut buf).await); + assert_eq!(n, 0); + assert_eq!(buf, ""); +} |