feat: full NFSv4.2 server and client in pure Go

Assisted-by: GLM 5.3 Flash

internal/nfs4server/opslog_test.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: MIT
+
+package nfs4server
+
+import (
+	"bytes"
+	"log"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"sourcedock.dev/petrbalvin/nfs/internal/nfs4"
+)
+
+// TestOpName covers the log names of the common operations and the
+// numeric fallback.
+func TestOpName(t *testing.T) {
+	for op, want := range map[uint32]string{
+		nfs4.OpGetattr: "GETATTR", nfs4.OpReaddir: "READDIR",
+		nfs4.OpReclaimComplete: "RECLAIM_COMPLETE", nfs4.OpGetxattr: "GETXATTR",
+		999: "OP999",
+	} {
+		if got := opName(op); got != want {
+			t.Fatalf("opName(%d) = %q, want %q", op, got, want)
+		}
+	}
+}
+
+// TestLogOp covers the log line shape: operation, status, duration.
+func TestLogOp(t *testing.T) {
+	var buf bytes.Buffer
+	log.SetOutput(&buf)
+	t.Cleanup(func() { log.SetOutput(os.Stderr) })
+	logOp(nfs4.OpWrite, nfs4.ErrOK, 1500*time.Microsecond)
+	line := buf.String()
+	if !strings.Contains(line, "WRITE status 0") || !strings.Contains(line, "1.5") {
+		t.Fatalf("log line %q misses the operation, the status or the duration", line)
+	}
+}