Update from chromium 62675d9fb31fb8cedc40f68e78e8445a74f362e7

sandbox/linux/bpf_dsl/cons_unittest.cc

+// Copyright 2014 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 "sandbox/linux/bpf_dsl/cons.h"
+
+#include <string>
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sandbox {
+namespace {
+
+std::string Join(cons::List<char> char_list) {
+  std::string res;
+  for (const char& ch : char_list) {
+    res.push_back(ch);
+  }
+  return res;
+}
+
+TEST(ConsListTest, Basic) {
+  cons::List<char> ba = Cons('b', Cons('a', cons::List<char>()));
+  EXPECT_EQ("ba", Join(ba));
+
+  cons::List<char> cba = Cons('c', ba);
+  cons::List<char> dba = Cons('d', ba);
+  EXPECT_EQ("cba", Join(cba));
+  EXPECT_EQ("dba", Join(dba));
+}
+
+}  // namespace
+}  // namespace sandbox