refactor: consolidate darwin unix socket test helpers (#21283)

testutil/unixsocket.go

@@ -0,0 +1,34 @@
+package testutil
+
+import (
+	"os"
+	"runtime"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// TempDirUnixSocket returns a temporary directory that can safely hold unix
+// sockets (probably).
+//
+// During tests on darwin we hit the max path length limit for unix sockets
+// pretty easily in the default location, so this function uses /tmp instead to
+// get shorter paths.
+func TempDirUnixSocket(t *testing.T) string {
+	t.Helper()
+	if runtime.GOOS == "darwin" {
+		testName := strings.ReplaceAll(t.Name(), "/", "_")
+		dir, err := os.MkdirTemp("/tmp", testName)
+		require.NoError(t, err, "create temp dir for gpg test")
+
+		t.Cleanup(func() {
+			err := os.RemoveAll(dir)
+			assert.NoError(t, err, "remove temp dir", dir)
+		})
+		return dir
+	}
+
+	return t.TempDir()
+}