[chromedriver] Implement SwitchToFrame command.

chrome/test/chromedriver/dom_tracker_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 <string>
+
+#include "base/json/json_reader.h"
+#include "base/values.h"
+#include "chrome/test/chromedriver/dom_tracker.h"
+#include "chrome/test/chromedriver/status.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(DomTracker, GetFrameIdForNode) {
+  DomTracker tracker;
+  std::string frame_id;
+  ASSERT_TRUE(tracker.GetFrameIdForNode(101, &frame_id).IsError());
+  ASSERT_TRUE(frame_id.empty());
+
+  const char nodes[] =
+      "[{\"nodeId\":100,\"children\":"
+      "    [{\"nodeId\":101},"
+      "     {\"nodeId\":102,\"frameId\":\"f\"}]"
+      "}]";
+  base::DictionaryValue params;
+  params.Set("nodes", base::JSONReader::Read(nodes));
+  tracker.OnEvent("DOM.setChildNodes", params);
+  ASSERT_TRUE(tracker.GetFrameIdForNode(101, &frame_id).IsError());
+  ASSERT_TRUE(frame_id.empty());
+  ASSERT_TRUE(tracker.GetFrameIdForNode(102, &frame_id).IsOk());
+  ASSERT_STREQ("f", frame_id.c_str());
+
+  tracker.OnEvent("DOM.documentUpdated", params);
+  ASSERT_TRUE(tracker.GetFrameIdForNode(102, &frame_id).IsError());
+}
+
+TEST(DomTracker, GetContextIdForFrame) {
+  DomTracker tracker;
+  int context_id = -1;
+  ASSERT_TRUE(tracker.GetContextIdForFrame("f", &context_id).IsError());
+  ASSERT_EQ(-1, context_id);
+
+  const char context[] = "{\"id\":100,\"frameId\":\"f\"}";
+  base::DictionaryValue params;
+  params.Set("context", base::JSONReader::Read(context));
+  tracker.OnEvent("Runtime.executionContextCreated", params);
+  ASSERT_TRUE(tracker.GetContextIdForFrame("foo", &context_id).IsError());
+  ASSERT_EQ(-1, context_id);
+  ASSERT_TRUE(tracker.GetContextIdForFrame("f", &context_id).IsOk());
+  ASSERT_EQ(100, context_id);
+
+  tracker.OnEvent("DOM.documentUpdated", params);
+  ASSERT_TRUE(tracker.GetContextIdForFrame("f", &context_id).IsError());
+}