Erik Brakkee
3f3635b056
Wrote ChannelReadWriter that simulates a connection inmemory. This is used by the agentserver test for testing the initialization. The first test is already working.
65 lines
1.2 KiB
Go
65 lines
1.2 KiB
Go
package iowrappers
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import (
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"context"
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"io"
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"log"
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)
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type ChannelReadWriter struct {
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ctx context.Context
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receiver <-chan []byte
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// bytes that were read and that did not fit
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readBuf []byte
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sender chan<- []byte
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closed bool
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}
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func NewChannelReadWriter(ctx context.Context, receiver <-chan []byte,
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sender chan<- []byte) *ChannelReadWriter {
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return &ChannelReadWriter{
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ctx: ctx,
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receiver: receiver,
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sender: sender,
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closed: false,
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}
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}
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func (rw *ChannelReadWriter) Read(p []byte) (n int, err error) {
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nread := copy(p, rw.readBuf)
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if nread > 0 {
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rw.readBuf = rw.readBuf[nread:]
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return nread, nil
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}
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select {
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case <-rw.ctx.Done():
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log.Println("Context was canceled")
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return 0, io.EOF
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case data, ok := <-rw.receiver:
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if !ok {
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log.Println("Channel closed")
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return 0, io.EOF
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}
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nread = copy(p, data)
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rw.readBuf = data[nread:]
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return nread, nil
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}
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}
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func (rw *ChannelReadWriter) Write(p []byte) (n int, err error) {
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select {
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case <-rw.ctx.Done():
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return 0, io.EOF
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case rw.sender <- p:
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}
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return len(p), nil
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}
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func (rw *ChannelReadWriter) Close() error {
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if !rw.closed {
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close(rw.sender)
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rw.closed = true
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}
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return nil
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}
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