tokio-io-mock-fork

Forked and extended tokio_test::io module. Like original module, it allows creating AsyncRead + AsyncWrite objects which behave according to scenarios set using builder API.

Additional Features

• More informative panic messages (can include name, number of read and written bytes, etc.)
• More actions to mock: read EOFs, write shutdowns
• Ability to skip checking some of the written bytes; ability to turn off assertions entirely after a certain point.
• Panicless mode where failures are signaled using a channel instead.
• Dedicated tools to work with large spans of zero bytes (without keeping them allocated in memory).
• Text scenarios - a concise way to schedule multiple different actions using one &str.

Example

let mut mock = Builder::new().read(b"ping").eof().write(b"pong").build();

let mut buf = [0; 256];

let n = mock.read(&mut buf).await?;
assert_eq!(&buf[..n], b"ping");

let n = mock.read(&mut buf).await?;
assert_eq!(n, 0);

mock.write_all(b"pong").await?;