diff options
Diffstat (limited to 'tests/io_read_to_string.rs')
-rw-r--r-- | tests/io_read_to_string.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/tests/io_read_to_string.rs b/tests/io_read_to_string.rs index 6b384b8..f30c26c 100644 --- a/tests/io_read_to_string.rs +++ b/tests/io_read_to_string.rs @@ -1,8 +1,10 @@ #![warn(rust_2018_idioms)] #![cfg(feature = "full")] +use std::io; use tokio::io::AsyncReadExt; use tokio_test::assert_ok; +use tokio_test::io::Builder; #[tokio::test] async fn read_to_string() { @@ -13,3 +15,49 @@ async fn read_to_string() { assert_eq!(n, 11); assert_eq!(buf[..], "hello world"[..]); } + +#[tokio::test] +async fn to_string_does_not_truncate_on_utf8_error() { + let data = vec![0xff, 0xff, 0xff]; + + let mut s = "abc".to_string(); + + match AsyncReadExt::read_to_string(&mut data.as_slice(), &mut s).await { + Ok(len) => panic!("Should fail: {} bytes.", len), + Err(err) if err.to_string() == "stream did not contain valid UTF-8" => {} + Err(err) => panic!("Fail: {}.", err), + } + + assert_eq!(s, "abc"); +} + +#[tokio::test] +async fn to_string_does_not_truncate_on_io_error() { + let mut mock = Builder::new() + .read(b"def") + .read_error(io::Error::new(io::ErrorKind::Other, "whoops")) + .build(); + let mut s = "abc".to_string(); + + match AsyncReadExt::read_to_string(&mut mock, &mut s).await { + Ok(len) => panic!("Should fail: {} bytes.", len), + Err(err) if err.to_string() == "whoops" => {} + Err(err) => panic!("Fail: {}.", err), + } + + assert_eq!(s, "abc"); +} + +#[tokio::test] +async fn to_string_appends() { + let data = b"def".to_vec(); + + let mut s = "abc".to_string(); + + let len = AsyncReadExt::read_to_string(&mut data.as_slice(), &mut s) + .await + .unwrap(); + + assert_eq!(len, 3); + assert_eq!(s, "abcdef"); +} |