12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 |
- // Copyright 2022 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/chrome_browser_field_trials.h"
- #include <memory>
- #include "base/feature_list.h"
- #include "components/prefs/testing_pref_service.h"
- #include "components/ukm/ukm_recorder_impl.h"
- #include "testing/gtest/include/gtest/gtest.h"
- #if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_ANDROID)
- TEST(ChromeBrowserFieldTrialsTest, SamplingTrials) {
- TestingPrefServiceSimple local_state;
- ChromeBrowserFieldTrials chrome_browser_field_trials(&local_state);
- const char kSamplingTrialName[] = "MetricsAndCrashSampling";
- #if BUILDFLAG(IS_ANDROID)
- const char kPostFREFixSamplingTrialName[] =
- "PostFREFixMetricsAndCrashSampling";
- #endif // BUILDFLAG(IS_ANDROID)
- const char kUkmSamplingTrialName[] = "UkmSamplingRate";
- // Verify that initially, sampling trials do not exist.
- EXPECT_FALSE(base::FieldTrialList::TrialExists(kSamplingTrialName));
- #if BUILDFLAG(IS_ANDROID)
- EXPECT_FALSE(base::FieldTrialList::TrialExists(kPostFREFixSamplingTrialName));
- #endif // BUILDFLAG(IS_ANDROID)
- EXPECT_FALSE(base::FieldTrialList::TrialExists(kUkmSamplingTrialName));
- // Call SetUpFeatureControllingFieldTrials(), which should create fallback
- // sampling trials since they do not exist yet.
- auto feature_list = std::make_unique<base::FeatureList>();
- chrome_browser_field_trials.SetUpFeatureControllingFieldTrials(
- /*has_seed=*/false, /*low_entropy_provider=*/nullptr, feature_list.get());
- // Verify that the sampling trials were created.
- EXPECT_TRUE(base::FieldTrialList::TrialExists(kSamplingTrialName));
- #if BUILDFLAG(IS_ANDROID)
- EXPECT_TRUE(base::FieldTrialList::TrialExists(kPostFREFixSamplingTrialName));
- #endif // BUILDFLAG(IS_ANDROID)
- EXPECT_TRUE(base::FieldTrialList::TrialExists(kUkmSamplingTrialName));
- // Call SetUpFeatureControllingFieldTrials() again. This should be a no-op,
- // since the sampling trials already exist. If the trials are created again,
- // a CHECK will be triggered and this will crash.
- chrome_browser_field_trials.SetUpFeatureControllingFieldTrials(
- /*has_seed=*/false, /*low_entropy_provider=*/nullptr, feature_list.get());
- }
- #endif // BUILDFLAG(IS_WIN) || BUILDFLAG(IS_ANDROID)
|