Struct LogCapture 

pub struct LogCapture(/* private fields */);

Everything the subscriber holding it has formatted.

Implementations

impl LogCapture

pub fn new() -> LogCapture

An empty capture.

pub fn lines(&self) -> Vec<String>

The lines formatted so far.

Panics if a subscriber panicked mid-write and poisoned the buffer.

pub fn wait_for<T>( &self, timeout: Duration, what: &str, check: impl FnMut() -> Option<T>, ) -> T

Poll check until it returns a value, on the cadence of wait_until.

Panics once timeout elapses, naming what and carrying every line captured so far.

pub fn wait_for_line(&self, timeout: Duration, needle: &str) -> String

The first captured line containing needle, waiting up to timeout for one to arrive.

Panics on timeout as wait_for does.

Trait Implementations

impl Clone for LogCapture

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LogCapture

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LogCapture

fn default() -> Self

Returns the “default value” for a type.

impl<'a> MakeWriter<'a> for LogCapture

type Writer = LogCapture

The concrete io::Write implementation returned by make_writer.

fn make_writer(&'a self) -> LogCapture

Returns an instance of Writer.

fn make_writer_for(&'a self, meta: &Metadata<'_>) -> Self::Writer

Returns a Writer for writing data from the span or event described by the provided Metadata.

impl Write for LogCapture

fn write(&mut self, buf: &[u8]) -> Result<usize>

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Writer has an efficient write_vectored implementation.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.