1 files changed, 23 insertions, 0 deletions
diff --git a/mfbt/tests/TestRange.cpp b/mfbt/tests/TestRange.cpp
new file mode 100644
index 000000000..419c1cc26
--- /dev/null
+++ b/mfbt/tests/TestRange.cpp
@@ -0,0 +1,23 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/Range.h"
+#include "mozilla/TypeTraits.h"
+
+using mozilla::IsConvertible;
+using mozilla::Range;
+
+static_assert(IsConvertible<Range<int>, Range<const int>>::value,
+              "Range should convert into const");
+static_assert(!IsConvertible<Range<const int>, Range<int>>::value,
+              "Range should not drop const in conversion");
+
+// We need a proper program so we have someplace to hang the static_asserts.
+int
+main()
+{
+  return 0;
+}