Improving flat containers interface.

base/functional_unittest.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/functional.h"
+
+#include "base/containers/container_test_utils.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+namespace {
+
+TEST(Functional, Less) {
+  using ExplicitInt = base::MoveOnlyInt;
+  EXPECT_TRUE(base::less()(ExplicitInt(3), 4));
+  EXPECT_FALSE(base::less()(4, ExplicitInt(3)));
+  EXPECT_TRUE(base::less()(3, 4));
+}
+
+}  // namespace
+
+}  // namespace base