The writers repo contains some utility writers:
linewriteris a buffered writer which is guaranteed to flush at every newlinetestwriterconverts each line of input into at.Logcall in the provided test object. It's meant to convert application log output into test log lines.ringbufferis a buffered io.ReadWriteCloser that is safe to read and write from different goroutines. It's compatible with a Scanner and is intended to be used to read JSON objects that are posted to a log and which may be buffered in awkward ways.filteris a writer that processes the data written to it and feeds it after processing to an output function