Macro assert_next_eq_with_timeout

macro_rules! assert_next_eq_with_timeout {
    ($stream:expr, $expected:expr) => { ... };
    ($stream:expr, $expected:expr, $timeout:literal ms) => { ... };
    ($stream:expr, $expected:expr, $timeout:literal ms, $($msg:tt)*) => { ... };
    ($stream:expr, $expected:expr, $($msg:tt)*) => { ... };
}

Available on crate feature testing only.

Asserts that the next item from an asynchronous stream is equal to the expected value, with an optional timeout and custom error message.

Arguments

• $stream - The asynchronous stream to retrieve the next item from.
• $expected - The expected value to assert against.
• $timeout ms (optional) - A timeout in milliseconds (e.g., 200ms). Defaults to 100ms.
• $msg (optional) - A formatted message string for assertion failure.

Examples

let mut stream = tokio_stream::iter(vec![42]);
assert_next_eq_with_timeout!(stream, 42);

let mut stream = tokio_stream::iter(vec![42]);
assert_next_eq_with_timeout!(stream, 42, 200 ms);

let mut stream = tokio_stream::iter(vec![42]);
assert_next_eq_with_timeout!(
    stream,
    42,
    "Expected 42 but got something else"
);

let mut stream = tokio_stream::iter(vec![42]);
assert_next_eq_with_timeout!(stream, 42, 200 ms, "Expected 42 within 200ms");