Framing for a DOMStorage backend that does not depend on in-process-webkit.

webkit/dom_storage/dom_storage_area_unittest.cc

+// Copyright (c) 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.
+
+#include "base/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "webkit/dom_storage/dom_storage_area.h"
+
+namespace dom_storage {
+
+TEST(DomStorageAreaTest, DomStorageAreaBasics) {
+  const GURL kOrigin("http://dom_storage/");
+  const string16 kKey(ASCIIToUTF16("key"));
+  const string16 kValue(ASCIIToUTF16("value"));
+  const string16 kKey2(ASCIIToUTF16("key2"));
+  const string16 kValue2(ASCIIToUTF16("value2"));
+
+  scoped_refptr<DomStorageArea> area(
+      new DomStorageArea(1, kOrigin, FilePath(), NULL));
+  string16 old_value;
+  NullableString16 old_nullable_value;
+  scoped_refptr<DomStorageArea> copy;
+
+  // We don't focus on the underlying DomStorageMap functionality
+  // since that's covered by seperate unit tests.
+  EXPECT_EQ(kOrigin, area->origin());
+  EXPECT_EQ(1, area->namespace_id());
+  EXPECT_EQ(0u, area->Length());
+  area->SetItem(kKey, kValue, &old_nullable_value);
+  area->SetItem(kKey2, kValue2, &old_nullable_value);
+
+  // Verify that a copy shares the same map.
+  copy = area->ShallowCopy(2);
+  EXPECT_EQ(kOrigin, copy->origin());
+  EXPECT_EQ(2, copy->namespace_id());
+  EXPECT_EQ(area->Length(), copy->Length());
+  EXPECT_EQ(area->GetItem(kKey).string(), copy->GetItem(kKey).string());
+  EXPECT_EQ(area->Key(0).string(), copy->Key(0).string());
+  EXPECT_EQ(copy->map_.get(), area->map_.get());
+
+  // But will deep copy-on-write as needed.
+  EXPECT_TRUE(area->RemoveItem(kKey, &old_value));
+  EXPECT_NE(copy->map_.get(), area->map_.get());
+  copy = area->ShallowCopy(2);
+  EXPECT_EQ(copy->map_.get(), area->map_.get());
+  EXPECT_TRUE(area->SetItem(kKey, kValue, &old_nullable_value));
+  EXPECT_NE(copy->map_.get(), area->map_.get());
+  copy = area->ShallowCopy(2);
+  EXPECT_EQ(copy->map_.get(), area->map_.get());
+  EXPECT_NE(0u, area->Length());
+  EXPECT_TRUE(area->Clear());
+  EXPECT_EQ(0u, area->Length());
+  EXPECT_NE(copy->map_.get(), area->map_.get());
+}
+
+}  // namespace dom_storage