61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
// Copyright (C) 2019 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package testutils
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import (
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"errors"
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"sync"
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)
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var ErrClosed = errors.New("closed")
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// BlockingRW implements io.Reader, Writer and Closer, but only returns when closed
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type BlockingRW struct {
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c chan struct{}
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closeOnce sync.Once
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}
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func NewBlockingRW() *BlockingRW {
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return &BlockingRW{
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c: make(chan struct{}),
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closeOnce: sync.Once{},
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}
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}
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func (rw *BlockingRW) Read(p []byte) (int, error) {
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<-rw.c
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return 0, ErrClosed
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}
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func (rw *BlockingRW) Write(p []byte) (int, error) {
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<-rw.c
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return 0, ErrClosed
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}
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func (rw *BlockingRW) Close() error {
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rw.closeOnce.Do(func() {
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close(rw.c)
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})
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return nil
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}
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// NoopRW implements io.Reader and Writer but never returns when called
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type NoopRW struct{}
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func (rw *NoopRW) Read(p []byte) (n int, err error) {
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return len(p), nil
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}
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func (rw *NoopRW) Write(p []byte) (n int, err error) {
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return len(p), nil
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}
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type NoopCloser struct{}
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func (NoopCloser) Close() error {
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return nil
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}
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