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//go:build windows || darwin || (linux && !baremetal && !wasip1 && !wasip2)
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test pipes on Unix and Windows systems.
package os_test
import (
"bytes"
"os"
"testing"
)
// TestSmokePipe is a simple smoke test for Pipe().
func TestSmokePipe(t *testing.T) {
// Procedure:
// 1. Get the bytes
// 2. Light the bytes on fire
// 3. Smoke the bytes
r, w, err := os.Pipe()
if err != nil {
t.Fatal(err)
return // TODO: remove once Fatal is fatal
}
defer r.Close()
defer w.Close()
msg := []byte("Sed nvlla nisi ardva virtvs")
n, err := w.Write(msg)
if err != nil {
t.Errorf("Writing to fresh pipe failed, error %v", err)
}
want := len(msg)
if n != want {
t.Errorf("Writing to fresh pipe wrote %d bytes, expected %d", n, want)
}
buf := make([]byte, 2*len(msg))
n, err = r.Read(buf)
if err != nil {
t.Errorf("Reading from pipe failed, error %v", err)
}
if n != want {
t.Errorf("Reading from pipe got %d bytes, expected %d", n, want)
}
// Read() does not set len(buf), so do it here.
buf = buf[:n]
if !bytes.Equal(buf, msg) {
t.Errorf("Reading from fresh pipe got wrong bytes")
}
}
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