Add MemoryWedge to ios/.

ios/chrome/browser/experimental_flags_unittest.mm

+// 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 "ios/chrome/browser/experimental_flags.h"
+
+#include "base/command_line.h"
+#include "base/macros.h"
+#include "base/metrics/field_trial.h"
+#include "components/variations/variations_associated_data.h"
+#include "ios/chrome/browser/chrome_switches.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+class ExperimentalFlagsTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    // Store the command line arguments to restore them at TearDown.
+    argv_ = base::CommandLine::ForCurrentProcess()->argv();
+  }
+
+  void TearDown() override {
+    // Reset command line.
+    base::CommandLine::Reset();
+    base::CommandLine::Init(0, NULL);
+    base::CommandLine::ForCurrentProcess()->InitFromArgv(argv_);
+
+    // Reset Finch.
+    variations::testing::ClearAllVariationParams();
+  }
+
+ private:
+  base::CommandLine::StringVector argv_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExperimentalFlagsTest);
+};
+
+TEST_F(ExperimentalFlagsTest, MemoryWedgeSwitchNoFinch) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  command_line->AppendSwitchASCII(switches::kIOSMemoryWedgeSize, "10");
+
+  EXPECT_EQ(10u, experimental_flags::MemoryWedgeSizeInMB());
+}
+
+TEST_F(ExperimentalFlagsTest, MemoryWedgeNoSwitchFinchNoParam) {
+  base::FieldTrialList field_trial_list(nullptr);
+  base::FieldTrialList::CreateFieldTrial("MemoryWedge", "Default");
+
+  EXPECT_EQ(0u, experimental_flags::MemoryWedgeSizeInMB());
+}
+
+TEST_F(ExperimentalFlagsTest, MemoryWedgeNoSwitchFinchParam) {
+  base::FieldTrialList field_trial_list(nullptr);
+  base::FieldTrialList::CreateFieldTrial("MemoryWedge", "Experiment2");
+  std::map<std::string, std::string> params;
+  params[std::string("wedge_size")] = "20";
+  ASSERT_TRUE(variations::AssociateVariationParams("MemoryWedge", "Experiment2",
+                                                   params));
+
+  EXPECT_EQ(20u, experimental_flags::MemoryWedgeSizeInMB());
+}
+
+TEST_F(ExperimentalFlagsTest, MemoryWedgeNoSwitchFinchWrongParam) {
+  base::FieldTrialList field_trial_list(nullptr);
+  base::FieldTrialList::CreateFieldTrial("MemoryWedge", "Experiment2");
+  std::map<std::string, std::string> params;
+  params[std::string("wedge_size")] = "twenty";
+  ASSERT_TRUE(variations::AssociateVariationParams("MemoryWedge", "Experiment2",
+                                                   params));
+
+  EXPECT_EQ(0u, experimental_flags::MemoryWedgeSizeInMB());
+}
+
+TEST_F(ExperimentalFlagsTest, MemoryWedgeSwitchFinch) {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  command_line->AppendSwitchASCII(switches::kIOSMemoryWedgeSize, "10");
+
+  base::FieldTrialList field_trial_list(nullptr);
+  base::FieldTrialList::CreateFieldTrial("MemoryWedge", "Experiment2");
+  std::map<std::string, std::string> params;
+  params[std::string("wedge_size")] = "20";
+  ASSERT_TRUE(variations::AssociateVariationParams("MemoryWedge", "Experiment2",
+                                                   params));
+
+  EXPECT_EQ(10u, experimental_flags::MemoryWedgeSizeInMB());
+}
+
+TEST_F(ExperimentalFlagsTest, MemoryWedgeNoSwitchNoFinch) {
+  EXPECT_EQ(0u, experimental_flags::MemoryWedgeSizeInMB());
+}
+
+}  // namespace