Upstream various ios/web utilities and helpers

ios/web/navigation/nscoder_util_unittest.mm

+// Copyright 2012 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.
+
+#import <Foundation/Foundation.h>
+
+#include "base/basictypes.h"
+#include "base/mac/scoped_nsobject.h"
+#include "ios/web/navigation/nscoder_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+namespace web {
+namespace {
+
+typedef PlatformTest NSCoderStdStringTest;
+
+const char* testStrings[] = {
+    "Arf",
+    "",
+    "This is working™",
+    "古池や蛙飛込む水の音\nふるいけやかわずとびこむみずのおと",
+    "ἀγεωμέτρητος μηδεὶς εἰσίτω",
+    "Bang!\t\n"
+};
+
+TEST_F(NSCoderStdStringTest, encodeDecode) {
+  for (size_t i = 0; i < arraysize(testStrings); ++i) {
+    NSMutableData* data = [NSMutableData data];
+
+    base::scoped_nsobject<NSKeyedArchiver> archiver(
+        [[NSKeyedArchiver alloc] initForWritingWithMutableData:data]);
+    nscoder_util::EncodeString(archiver, @"test", testStrings[i]);
+    [archiver finishEncoding];
+
+    base::scoped_nsobject<NSKeyedUnarchiver> unarchiver(
+        [[NSKeyedUnarchiver alloc] initForReadingWithData:data]);
+    const std::string decoded = nscoder_util::DecodeString(unarchiver, @"test");
+
+    EXPECT_EQ(decoded, testStrings[i]);
+  }
+}
+
+TEST_F(NSCoderStdStringTest, decodeEmpty) {
+  NSMutableData* data = [NSMutableData data];
+
+  base::scoped_nsobject<NSKeyedArchiver> archiver(
+      [[NSKeyedArchiver alloc] initForWritingWithMutableData:data]);
+  [archiver finishEncoding];
+
+  base::scoped_nsobject<NSKeyedUnarchiver> unarchiver(
+      [[NSKeyedUnarchiver alloc] initForReadingWithData:data]);
+  const std::string decoded = nscoder_util::DecodeString(unarchiver, @"test");
+
+  EXPECT_EQ(decoded, "");
+}
+
+}  // namespace
+}  // namespace web