New Task Manager - Phase 1.1: Implement Browser Process Task Providing

chrome/browser/task_management/providers/browser_process/browser_process_task_unittest.cc

+// Copyright 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 "chrome/browser/task_management/providers/browser_process/browser_process_task_provider.h"
+#include "chrome/grit/generated_resources.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace task_management {
+
+class BrowserProcessTaskProviderTest
+    : public testing::Test,
+      public TaskProviderObserver {
+ public:
+  BrowserProcessTaskProviderTest()
+      : provided_task_(nullptr) {
+  }
+
+  ~BrowserProcessTaskProviderTest() override {}
+
+  // task_management::TaskProviderObserver:
+  void TaskAdded(Task* task) override {
+    provided_task_ = task;
+  }
+  void TaskRemoved(Task* task) override {
+    // This will never be called in the case of a browser process task provider.
+    EXPECT_FALSE(true);

[Lei Zhang, 2015/04/03 02:44:14]

Just call FAIL() here.

[afakhry, 2015/04/03 16:04:27]

Done.

+  }
+
+ protected:
+  Task* provided_task_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BrowserProcessTaskProviderTest);
+};
+
+// Tests the browser process task provider and browser process task itself.
+TEST_F(BrowserProcessTaskProviderTest, TestObserving) {
+  BrowserProcessTaskProvider provider;
+  EXPECT_EQ(nullptr, provided_task_);
+  provider.SetObserver(this);
+  EXPECT_NE(nullptr, provided_task_);
+  provider.ClearObserver();
+  EXPECT_NE(nullptr, provided_task_);
+}
+
+// Testing retrieving the task from the provider using the ids of a URL request.
+TEST_F(BrowserProcessTaskProviderTest, GetTaskOfUrlRequest) {
+  BrowserProcessTaskProvider provider;
+  EXPECT_EQ(nullptr, provided_task_);
+  provider.SetObserver(this);
+  EXPECT_NE(nullptr, provided_task_);
+
+  Task* result = provider.GetTaskOfUrlRequest(1, 0, 0);
+  EXPECT_EQ(nullptr, result);
+  result = provider.GetTaskOfUrlRequest(0, -1, 0);
+  EXPECT_EQ(provided_task_, result);
+}
+
+// Test the provided browser process task itself.
+TEST_F(BrowserProcessTaskProviderTest, TestProvidedTask) {
+  BrowserProcessTaskProvider provider;
+  EXPECT_EQ(nullptr, provided_task_);
+  provider.SetObserver(this);
+  EXPECT_NE(nullptr, provided_task_);

[Lei Zhang, 2015/04/03 02:44:14]

This should be ASSERT and not EXPECT. If this fails, the entire unit_tests
process crashes.

[afakhry, 2015/04/03 16:04:27]

Done.

+
+  EXPECT_EQ(base::GetCurrentProcessHandle(), provided_task_->process_handle());
+  EXPECT_FALSE(provided_task_->ReportsWebCacheStats());
+  EXPECT_EQ(l10n_util::GetStringUTF16(IDS_TASK_MANAGER_WEB_BROWSER_CELL_TEXT),
+            provided_task_->title());
+  EXPECT_EQ(Task::BROWSER, provided_task_->GetType());
+  EXPECT_EQ(0, provided_task_->GetChildProcessUniqueID());
+  EXPECT_EQ(0, provided_task_->GetRoutingID());
+  const int received_bytes = 1024;
+  EXPECT_EQ(0, provided_task_->network_usage());
+  provided_task_->OnNetworkBytesRead(received_bytes);
+  // Do a refresh with a 1-second update time.
+  provided_task_->Refresh(base::TimeDelta::FromSeconds(1));
+  EXPECT_EQ(received_bytes, provided_task_->network_usage());
+}
+
+}  // namespace task_management