Refactor the render widget unittest so it can be reused to create a render view

unit test. Change the mock render thread to save all IPC messages it is asked to
send so that tests can verify that the correct ones were sent. There are some
new functions that support this checking.

Plumb the form state change notification through the render view so that we
will correctly update the form state to the browser.

Write two RenderView unit tests. One arbitrarily tests OnLoadAlternateHTMLText
which I used as a testcase for my testing framework. The other tests the above
form state change notification. I had to expose the timeout of this message
through the RenderView API so that the test can change it.
Review URL: http://codereview.chromium.org/16482

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@7549 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 135 insertions, 0 deletions

diff --git a/chrome/renderer/mock_render_thread.cc b/chrome/renderer/mock_render_thread.cc
new file mode 100644
index 0000000..050774e
--- /dev/null
+++ b/chrome/renderer/mock_render_thread.cc
@@ -0,0 +1,135 @@
+// Copyright (c) 2008 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 "chrome/renderer/mock_render_thread.h"
+
+#include "base/logging.h"
+#include "chrome/common/ipc_message_utils.h"
+#include "chrome/common/render_messages.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+MockRenderThread::MockRenderThread()
+    : routing_id_(0),
+      opener_id_(0),
+      widget_(NULL),
+      reply_deserializer_(NULL) {
+}
+
+MockRenderThread::~MockRenderThread() {
+  // Don't leak the allocated message bodies.
+  ClearMessages();
+}
+
+// Called by the Widget. The routing_id must match the routing id assigned
+// to the Widget in reply to ViewHostMsg_CreateWidget message.
+void MockRenderThread::AddRoute(int32 routing_id,
+                                IPC::Channel::Listener* listener) {
+  EXPECT_EQ(routing_id_, routing_id);
+  widget_ = listener;
+}
+
+// Called by the Widget. The routing id must match the routing id of AddRoute.
+void MockRenderThread::RemoveRoute(int32 routing_id) {
+  EXPECT_EQ(routing_id_, routing_id);
+  widget_ = NULL;
+}
+
+// Called by the Widget. Used to send messages to the browser.
+// We short-circuit the mechanim and handle the messages right here on this
+// class.
+bool MockRenderThread::Send(IPC::Message* msg) {
+  // We need to simulate a synchronous channel, thus we are going to receive
+  // through this function messages, messages with reply and reply messages.
+  // We can only handle one synchronous message at a time.
+  if (msg->is_reply()) {
+    if (reply_deserializer_) {
+      reply_deserializer_->SerializeOutputParameters(*msg);
+      delete reply_deserializer_;
+      reply_deserializer_ = NULL;
+    }
+  } else {
+    if (msg->is_sync()) {
+      reply_deserializer_ =
+          static_cast<IPC::SyncMessage*>(msg)->GetReplyDeserializer();
+    }
+    OnMessageReceived(*msg);
+  }
+  delete msg;
+  return true;
+}
+
+void MockRenderThread::ClearMessages() {
+  for (size_t i = 0; i < messages_.size(); i++)
+    delete[] messages_[i].second;
+  messages_.clear();
+}
+
+const IPC::Message* MockRenderThread::GetMessageAt(size_t index) const {
+  if (index >= messages_.size())
+    return NULL;
+  return &messages_[index].first;
+}
+
+const IPC::Message* MockRenderThread::GetFirstMessageMatching(uint16 id) const {
+  for (size_t i = 0; i < messages_.size(); i++) {
+    if (messages_[i].first.type() == id)
+      return &messages_[i].first;
+  }
+  return NULL;
+}
+
+const IPC::Message* MockRenderThread::GetUniqueMessageMatching(
+    uint16 id) const {
+  size_t found_index = 0;
+  size_t found_count = 0;
+  for (size_t i = 0; i < messages_.size(); i++) {
+    if (messages_[i].first.type() == id) {
+      found_count++;
+      found_index = i;
+    }
+  }
+  if (found_count != 1)
+    return NULL;  // Didn't find a unique one.
+  return &messages_[found_index].first;
+}
+
+void MockRenderThread::SendCloseMessage() {
+  ViewMsg_Close msg(routing_id_);
+  widget_->OnMessageReceived(msg);
+}
+
+void MockRenderThread::OnMessageReceived(const IPC::Message& msg) {
+  // Copy the message into a pair. This is tricky since the message doesn't
+  // manage its data itself.
+  char* data_copy;
+  if (msg.size()) {
+    data_copy = new char[msg.size()];
+    memcpy(data_copy, msg.data(), msg.size());
+  } else {
+    // Dummy data so we can treat everything the same.
+    data_copy = new char[1];
+    data_copy[0] = 0;
+  }
+
+  // Save the message.
+  messages_.push_back(
+      std::make_pair(IPC::Message(data_copy, msg.size()), data_copy));
+
+  // Some messages we do special handling.
+  bool handled = true;
+  bool msg_is_ok = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(MockRenderThread, msg, msg_is_ok)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CreateWidget, OnMsgCreateWidget);
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+}
+
+// The Widget expects to be returned valid route_id.
+void MockRenderThread::OnMsgCreateWidget(int opener_id,
+                                         bool focus_on_show,
+                                         int* route_id) {
+  opener_id_ = opener_id;
+  *route_id = routing_id_;
+}
+