Only show notification for low 3g data for the last data-based plan....

chrome/browser/chromeos/network_message_observer_unittest.cc

+// Copyright (c) 2010 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/chromeos/network_message_observer.h"
+
+#include "base/time.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+
+namespace {
+
+CellularDataPlan CreateDataPlan(CellularDataPlanType type, int64 start_sec,
+                                int64 end_sec, int64 bytes, int64 used) {
+  CellularDataPlan plan;
+  plan.plan_type = type;
+  plan.plan_start_time = base::Time::FromDoubleT(start_sec);
+  plan.plan_end_time = base::Time::FromDoubleT(end_sec);
+  plan.plan_data_bytes = bytes;
+  plan.data_bytes_used = used;
+  return plan;
+}
+
+}  // namespace
+
+// Test the code that checks if a data plan is an applicable backup plan.
+TEST(NetworkMessageObserverTest, TestIsApplicableBackupPlan) {
+  // IsApplicableBackupPlan returns true if:
+  //   (unlimited OR used bytes < max bytes) AND
+  //   ((start time - 1 sec) <= end time of currently active plan).
+
+  // Current plan that ends at 100.
+  CellularDataPlan plan =
+      CreateDataPlan(CELLULAR_DATA_PLAN_UNLIMITED, 0, 100, 0, 0);
+
+  // Test unlimited plans.
+  CellularDataPlan time_50 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_UNLIMITED, 50, 500, 0, 0);
+  CellularDataPlan time_100 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_UNLIMITED, 100, 500, 0, 0);
+  CellularDataPlan time_101 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_UNLIMITED, 101, 500, 0, 0);
+  CellularDataPlan time_102 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_UNLIMITED, 102, 500, 0, 0);
+  EXPECT_TRUE(NetworkMessageObserver::IsApplicableBackupPlan(&plan, &time_50));
+  EXPECT_TRUE(NetworkMessageObserver::IsApplicableBackupPlan(&plan, &time_100));
+  EXPECT_TRUE(NetworkMessageObserver::IsApplicableBackupPlan(&plan, &time_101));
+  EXPECT_FALSE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                              &time_102));
+
+  // Test data plans.
+  CellularDataPlan data_0_0 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_METERED_PAID, 100, 500, 0, 0);
+  CellularDataPlan data_100_0 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_METERED_PAID, 100, 500, 100, 0);
+  CellularDataPlan data_100_50 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_METERED_PAID, 100, 500, 100, 50);
+  CellularDataPlan data_100_100 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_METERED_PAID, 100, 500, 100, 100);
+  CellularDataPlan data_100_200 =
+      CreateDataPlan(CELLULAR_DATA_PLAN_METERED_PAID, 100, 500, 100, 200);
+  CellularDataPlan data_100_0_gap =
+      CreateDataPlan(CELLULAR_DATA_PLAN_METERED_PAID, 200, 500, 100, 0);
+  EXPECT_FALSE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                              &data_0_0));
+  EXPECT_TRUE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                             &data_100_0));
+  EXPECT_TRUE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                             &data_100_50));
+  EXPECT_FALSE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                              &data_100_100));
+  EXPECT_FALSE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                              &data_100_200));
+  EXPECT_FALSE(NetworkMessageObserver::IsApplicableBackupPlan(&plan,
+                                                              &data_100_0_gap));
+}
+
+
+}  // namespace chromeos