[chromedriver] Add Network Conditions Override Manager and tests

chrome/test/chromedriver/chrome/network_conditions_override_manager_unittest.cc

+// Copyright (c) 2015 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 <vector>
+
+#include "base/compiler_specific.h"
+#include "base/values.h"
+#include "chrome/test/chromedriver/chrome/network_conditions.h"
+#include "chrome/test/chromedriver/chrome/network_conditions_override_manager.h"
+#include "chrome/test/chromedriver/chrome/status.h"
+#include "chrome/test/chromedriver/chrome/stub_devtools_client.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+struct Command {
+  Command() {}
+  Command(const std::string& method, const base::DictionaryValue& params)
+      : method(method) {
+    this->params.MergeDictionary(&params);
+  }
+  Command(const Command& command) {
+    *this = command;
+  }
+  Command& operator=(const Command& command) {
+    method = command.method;
+    params.Clear();
+    params.MergeDictionary(&command.params);
+    return *this;
+  }
+  ~Command() {}
+
+  std::string method;
+  base::DictionaryValue params;
+};
+
+class RecorderDevToolsClient : public StubDevToolsClient {
+ public:
+  RecorderDevToolsClient() {}
+  ~RecorderDevToolsClient() override {}
+
+  // Overridden from StubDevToolsClient:
+  Status SendCommandAndGetResult(
+      const std::string& method,
+      const base::DictionaryValue& params,
+      scoped_ptr<base::DictionaryValue>* result) override {
+    commands_.push_back(Command(method, params));
+
+    // For results of "canEmulateNetworkConditions", always true.
+    (*result).reset(new base::DictionaryValue);
+    (*result)->SetBoolean("result", true);
+    return Status(kOk);
+  }
+
+  std::vector<Command> commands_;
+};

[samuong, 2015/02/11 23:22:14]

Copies of Command and RecorderDevToolsClient are defined used in a lot of
places. Can we extract this out and share it, rather than copy and paste it? I
think it makes sense to create recorder_devtools_client.cc/h and #include it
from the appropriate *_unittest.cc files. We should only link it into the test
targets, not the main chromedriver one.

[srawlins, 2015/02/25 22:40:57]

Great idea. Done. I pulled it out of 4 different unittests.cc

+
+void AssertNetworkConditionsCommand(
+    const Command& command,
+    const NetworkConditions& network_conditions) {
+  ASSERT_EQ("Network.emulateNetworkConditions", command.method);
+  bool offline;
+  double latency, download_throughput, upload_throughput;
+  ASSERT_TRUE(command.params.GetBoolean("offline", &offline));
+  ASSERT_TRUE(command.params.GetDouble("latency", &latency));
+  ASSERT_TRUE(command.params.GetDouble("downloadThroughput",
+                                       &download_throughput));
+  ASSERT_TRUE(command.params.GetDouble("uploadThroughput",
+                                       &upload_throughput));
+  ASSERT_EQ(network_conditions.offline, offline);
+  ASSERT_EQ(network_conditions.latency, latency);
+  ASSERT_EQ(network_conditions.download_throughput, download_throughput);
+  ASSERT_EQ(network_conditions.upload_throughput, upload_throughput);
+}
+
+}  // namespace
+
+TEST(NetworkConditionsOverrideManager, OverrideSendsCommand) {
+  RecorderDevToolsClient client;
+  NetworkConditionsOverrideManager manager(&client);
+  NetworkConditions network_conditions = {false, 100, 750*1024, 750*1024};
+  manager.OverrideNetworkConditions(network_conditions);
+  ASSERT_EQ(3u, client.commands_.size());
+  ASSERT_NO_FATAL_FAILURE(
+     AssertNetworkConditionsCommand(client.commands_[2], network_conditions));
+
+  network_conditions.latency = 200;
+  manager.OverrideNetworkConditions(network_conditions);
+  ASSERT_EQ(6u, client.commands_.size());
+  ASSERT_NO_FATAL_FAILURE(
+      AssertNetworkConditionsCommand(client.commands_[5], network_conditions));
+}
+
+TEST(NetworkConditionsOverrideManager, SendsCommandOnConnect) {
+  RecorderDevToolsClient client;
+  NetworkConditionsOverrideManager manager(&client);
+  ASSERT_EQ(0u, client.commands_.size());
+  ASSERT_EQ(kOk, manager.OnConnected(&client).code());
+
+  NetworkConditions network_conditions = {false, 100, 750*1024, 750*1024};
+  manager.OverrideNetworkConditions(network_conditions);
+  ASSERT_EQ(3u, client.commands_.size());
+  ASSERT_EQ(kOk, manager.OnConnected(&client).code());
+  ASSERT_EQ(6u, client.commands_.size());
+  ASSERT_NO_FATAL_FAILURE(
+      AssertNetworkConditionsCommand(client.commands_[5], network_conditions));
+}
+
+TEST(NetworkConditionsOverrideManager, SendsCommandOnNavigation) {
+  RecorderDevToolsClient client;
+  NetworkConditionsOverrideManager manager(&client);
+  base::DictionaryValue main_frame_params;
+  ASSERT_EQ(kOk,
+            manager.OnEvent(&client, "Page.frameNavigated", main_frame_params)
+                .code());
+  ASSERT_EQ(0u, client.commands_.size());
+
+  NetworkConditions network_conditions = {false, 100, 750*1024, 750*1024};
+  manager.OverrideNetworkConditions(network_conditions);
+  ASSERT_EQ(3u, client.commands_.size());
+  ASSERT_EQ(kOk,
+            manager.OnEvent(&client, "Page.frameNavigated", main_frame_params)
+                .code());
+  ASSERT_EQ(6u, client.commands_.size());
+  ASSERT_NO_FATAL_FAILURE(
+      AssertNetworkConditionsCommand(client.commands_[2], network_conditions));
+
+  base::DictionaryValue sub_frame_params;
+  sub_frame_params.SetString("frame.parentId", "id");
+  ASSERT_EQ(
+      kOk,
+      manager.OnEvent(&client, "Page.frameNavigated", sub_frame_params).code());
+  ASSERT_EQ(6u, client.commands_.size());
+}