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// Copyright 2014 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 "components/variations/variations_http_header_provider.h"
#include <string>
#include "base/base64.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/run_loop.h"
#include "components/variations/entropy_provider.h"
#include "components/variations/proto/client_variations.pb.h"
#include "components/variations/variations_associated_data.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace variations {
namespace {
// Decodes the variations header and extracts the variation ids.
bool ExtractVariationIds(const std::string& variations,
std::set<VariationID>* variation_ids,
std::set<VariationID>* trigger_ids) {
std::string serialized_proto;
if (!base::Base64Decode(variations, &serialized_proto))
return false;
ClientVariations proto;
if (!proto.ParseFromString(serialized_proto))
return false;
for (int i = 0; i < proto.variation_id_size(); ++i)
variation_ids->insert(proto.variation_id(i));
for (int i = 0; i < proto.trigger_variation_id_size(); ++i)
trigger_ids->insert(proto.trigger_variation_id(i));
return true;
}
scoped_refptr<base::FieldTrial> CreateTrialAndAssociateId(
const std::string& trial_name,
const std::string& default_group_name,
IDCollectionKey key,
VariationID id) {
scoped_refptr<base::FieldTrial> trial(
base::FieldTrialList::CreateFieldTrial(trial_name, default_group_name));
AssociateGoogleVariationID(key, trial->trial_name(), trial->group_name(), id);
return trial;
}
} // namespace
class VariationsHttpHeaderProviderTest : public ::testing::Test {
public:
VariationsHttpHeaderProviderTest() {}
~VariationsHttpHeaderProviderTest() override {}
void TearDown() override { testing::ClearAllVariationIDs(); }
};
TEST_F(VariationsHttpHeaderProviderTest, SetDefaultVariationIds_Valid) {
base::MessageLoop loop;
VariationsHttpHeaderProvider provider;
// Valid experiment ids.
EXPECT_TRUE(provider.SetDefaultVariationIds({"12", "456", "t789"}));
provider.InitVariationIDsCacheIfNeeded();
std::string variations = provider.GetClientDataHeader(false);
EXPECT_FALSE(variations.empty());
std::set<VariationID> variation_ids;
std::set<VariationID> trigger_ids;
ASSERT_TRUE(ExtractVariationIds(variations, &variation_ids, &trigger_ids));
EXPECT_TRUE(variation_ids.find(12) != variation_ids.end());
EXPECT_TRUE(variation_ids.find(456) != variation_ids.end());
EXPECT_TRUE(trigger_ids.find(789) != trigger_ids.end());
EXPECT_FALSE(variation_ids.find(789) != variation_ids.end());
}
TEST_F(VariationsHttpHeaderProviderTest, SetDefaultVariationIds_Invalid) {
base::MessageLoop loop;
VariationsHttpHeaderProvider provider;
// Invalid experiment ids.
EXPECT_FALSE(provider.SetDefaultVariationIds(
std::vector<std::string>{"abcd12", "456"}));
provider.InitVariationIDsCacheIfNeeded();
EXPECT_TRUE(provider.GetClientDataHeader(false).empty());
// Invalid trigger experiment id
EXPECT_FALSE(provider.SetDefaultVariationIds(
std::vector<std::string>{"12", "tabc456"}));
provider.InitVariationIDsCacheIfNeeded();
EXPECT_TRUE(provider.GetClientDataHeader(false).empty());
}
TEST_F(VariationsHttpHeaderProviderTest, OnFieldTrialGroupFinalized) {
base::MessageLoop loop;
base::FieldTrialList field_trial_list(nullptr);
VariationsHttpHeaderProvider provider;
provider.InitVariationIDsCacheIfNeeded();
const std::string default_name = "default";
scoped_refptr<base::FieldTrial> trial_1(CreateTrialAndAssociateId(
"t1", default_name, GOOGLE_WEB_PROPERTIES, 123));
ASSERT_EQ(default_name, trial_1->group_name());
scoped_refptr<base::FieldTrial> trial_2(CreateTrialAndAssociateId(
"t2", default_name, GOOGLE_WEB_PROPERTIES_TRIGGER, 456));
ASSERT_EQ(default_name, trial_2->group_name());
scoped_refptr<base::FieldTrial> trial_3(CreateTrialAndAssociateId(
"t3", default_name, GOOGLE_WEB_PROPERTIES_SIGNED_IN, 789));
ASSERT_EQ(default_name, trial_3->group_name());
// Run the message loop to make sure OnFieldTrialGroupFinalized is called for
// the two field trials.
base::RunLoop().RunUntilIdle();
// Get non-signed in ids.
{
std::string variations = provider.GetClientDataHeader(false);
std::set<VariationID> variation_ids;
std::set<VariationID> trigger_ids;
ASSERT_TRUE(ExtractVariationIds(variations, &variation_ids, &trigger_ids));
EXPECT_EQ(1U, variation_ids.size());
EXPECT_TRUE(variation_ids.find(123) != variation_ids.end());
EXPECT_EQ(1U, trigger_ids.size());
EXPECT_TRUE(trigger_ids.find(456) != trigger_ids.end());
}
// Now, get signed-in ids.
{
std::string variations = provider.GetClientDataHeader(true);
std::set<VariationID> variation_ids;
std::set<VariationID> trigger_ids;
ASSERT_TRUE(ExtractVariationIds(variations, &variation_ids, &trigger_ids));
EXPECT_EQ(2U, variation_ids.size());
EXPECT_TRUE(variation_ids.find(123) != variation_ids.end());
EXPECT_TRUE(variation_ids.find(789) != variation_ids.end());
EXPECT_EQ(1U, trigger_ids.size());
EXPECT_TRUE(trigger_ids.find(456) != trigger_ids.end());
}
}
TEST_F(VariationsHttpHeaderProviderTest, GetVariationsString) {
base::MessageLoop loop;
base::FieldTrialList field_trial_list(nullptr);
CreateTrialAndAssociateId("t1", "g1", GOOGLE_WEB_PROPERTIES, 123);
CreateTrialAndAssociateId("t2", "g2", GOOGLE_WEB_PROPERTIES, 124);
// SIGNED_IN ids shouldn't be included.
CreateTrialAndAssociateId("t3", "g3", GOOGLE_WEB_PROPERTIES_SIGNED_IN, 125);
VariationsHttpHeaderProvider provider;
std::vector<std::string> ids;
ids.push_back("100");
ids.push_back("200");
provider.SetDefaultVariationIds(ids);
EXPECT_EQ(" 100 123 124 200 ", provider.GetVariationsString());
}
} // namespace variations
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