Struct MockWriter

pub struct MockWriter<'a> {
    buf: &'a Mutex<Vec<u8>>,
}

A fake writer that writes into a buffer (behind a mutex).

Fields

buf: &'a Mutex<Vec<u8>>

Implementations

impl<'a> MockWriter<'a>

pub fn new(buf: &'a Mutex<Vec<u8>>) -> Self

Create a new MockWriter that writes into the specified buffer (behind a mutex).

fn buf(&self) -> Result<MutexGuard<'a, Vec<u8>>>

Give access to the internal buffer (behind a MutexGuard).

Trait Implementations

impl<'a> Debug for MockWriter<'a>

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

Formats the value using the given formatter.

impl MakeWriter<'_> for MockWriter<'_>

type Writer = MockWriter<'_>

The concrete io::Write implementation returned by make_writer.

fn make_writer(&self) -> Self::Writer

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 MockWriter<'_>

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.