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// License: GPLv3 Copyright: 2024, Kovid Goyal, <kovid at kovidgoyal.net>
package utils
import (
"fmt"
"os"
"os/exec"
"testing"
)
var _ = fmt.Print
func TestFileLock(t *testing.T) {
tdir := t.TempDir()
file_descriptor, err := os.Open(tdir)
if err != nil {
t.Fatalf("Initial open of %s failed with error: %s", tdir, err)
}
if err = LockFileExclusive(file_descriptor); err != nil {
file_descriptor.Close()
t.Fatalf("Initial lock of %s failed with error: %s", tdir, err)
}
defer func() {
_ = UnlockFile(file_descriptor)
file_descriptor.Close()
}()
cmd := exec.Command(KittyExe(), "+runpy", `
import sys, os, fcntl
fd = os.open(sys.argv[-1], os.O_RDONLY)
try:
fcntl.flock(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
except BlockingIOError:
sys.exit(0)
else:
print("Lock unexpectedly succeeded", flush=True)
sys.exit(1)
`, tdir)
if output, err := cmd.CombinedOutput(); err != nil {
t.Fatalf("Lock test process failed with error: %s and output:\n%s", err, string(output))
}
}
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