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package syscallcompat
import (
"bytes"
"syscall"
"testing"
)
func TestReadlinkat(t *testing.T) {
for _, targetLen := range []int{100, 500, 4000} {
target := string(bytes.Repeat([]byte("x"), targetLen))
err := syscall.Symlink(target, tmpDir+"/readlinkat")
if err != nil {
if targetLen > 1000 {
// Symlinks longer than 1024 (?) bytes are not supported on
// MacOS and XFS
t.Logf("skipping targetLen=%d: %v", targetLen, err)
continue
}
t.Fatalf("targetLen=%d: %v", targetLen, err)
}
target2, err := Readlinkat(tmpDirFd, "readlinkat")
if err != nil {
t.Fatal(err)
}
if target != target2 {
t.Errorf("target=%q != target2=%q", target, target2)
}
err = syscall.Unlink(tmpDir + "/readlinkat")
if err != nil {
t.Fatal(err)
}
}
}
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