client io architecture

pkg/util/fs_windows_test.go

@@ -0,0 +1,50 @@
+//go:build windows
+
+package util
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+// TestWritable_NewFile verifies that a freshly created regular file is writable.
+func TestWritable_NewFile(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	path := filepath.Join(dir, "file.txt")
+
+	err := os.WriteFile(path, []byte("x"), 0o600)
+	require.NoError(t, err)
+
+	ok, err := Writable(path)
+	require.NoError(t, err)
+	require.True(t, ok)
+}
+
+// TestWritable_NewDirectory verifies that a freshly created directory is writable
+// by checking that a temp file can be created inside it.
+func TestWritable_NewDirectory(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+
+	ok, err := Writable(dir)
+	require.NoError(t, err)
+	require.True(t, ok)
+}
+
+// TestWritable_MissingPath verifies that a missing path returns an error from Stat.
+func TestWritable_MissingPath(t *testing.T) {
+	t.Parallel()
+
+	dir := t.TempDir()
+	path := filepath.Join(dir, "missing")
+
+	ok, err := Writable(path)
+	require.Error(t, err)
+	require.False(t, ok)
+}