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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 "chrome/common/variations/experiment_labels.h"
#include <set>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/metrics/field_trial.h"
#include "base/strings/string_split.h"
#include "base/strings/utf_string_conversions.h"
#include "components/variations/variations_associated_data.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace chrome_variations {
TEST(ExperimentLabelsTest, BuildGoogleUpdateExperimentLabel) {
const variations::VariationID TEST_VALUE_A = 3300200;
const variations::VariationID TEST_VALUE_B = 3300201;
const variations::VariationID TEST_VALUE_C = 3300202;
const variations::VariationID TEST_VALUE_D = 3300203;
struct {
const char* active_group_pairs;
const char* expected_ids;
} test_cases[] = {
// Empty group.
{"", ""},
// Group of 1.
{"FieldTrialA#Default", "3300200"},
// Group of 1, doesn't have an associated ID.
{"FieldTrialA#DoesNotExist", ""},
// Group of 3.
{"FieldTrialA#Default#FieldTrialB#Group1#FieldTrialC#Default",
"3300200#3300201#3300202"},
// Group of 3, one doesn't have an associated ID.
{"FieldTrialA#Default#FieldTrialB#DoesNotExist#FieldTrialC#Default",
"3300200#3300202"},
// Group of 3, all three don't have an associated ID.
{"FieldTrialX#Default#FieldTrialB#DoesNotExist#FieldTrialC#Default",
"3300202"},
};
// Register a few VariationIDs.
AssociateGoogleVariationID(variations::GOOGLE_UPDATE_SERVICE, "FieldTrialA",
"Default", TEST_VALUE_A);
AssociateGoogleVariationID(variations::GOOGLE_UPDATE_SERVICE, "FieldTrialB",
"Group1", TEST_VALUE_B);
AssociateGoogleVariationID(variations::GOOGLE_UPDATE_SERVICE, "FieldTrialC",
"Default", TEST_VALUE_C);
AssociateGoogleVariationID(variations::GOOGLE_UPDATE_SERVICE, "FieldTrialD",
"Default", TEST_VALUE_D); // Not actually used.
for (size_t i = 0; i < arraysize(test_cases); ++i) {
// Parse the input groups.
base::FieldTrial::ActiveGroups groups;
std::vector<std::string> group_data;
base::SplitString(test_cases[i].active_group_pairs, '#', &group_data);
ASSERT_EQ(0U, group_data.size() % 2);
for (size_t j = 0; j < group_data.size(); j += 2) {
base::FieldTrial::ActiveGroup group;
group.trial_name = group_data[j];
group.group_name = group_data[j + 1];
groups.push_back(group);
}
// Parse the expected output.
std::vector<std::string> expected_ids_list;
base::SplitString(test_cases[i].expected_ids, '#', &expected_ids_list);
std::string experiment_labels_string = base::UTF16ToUTF8(
BuildGoogleUpdateExperimentLabel(groups));
// Split the VariationIDs from the labels for verification below.
std::vector<std::string> split_labels;
std::set<std::string> parsed_ids;
base::SplitString(experiment_labels_string, ';', &split_labels);
for (std::vector<std::string>::const_iterator it = split_labels.begin();
it != split_labels.end(); ++it) {
// The ID is precisely between the '=' and '|' characters in each label.
size_t index_of_equals = it->find('=');
size_t index_of_pipe = it->find('|');
ASSERT_NE(std::string::npos, index_of_equals);
ASSERT_NE(std::string::npos, index_of_pipe);
ASSERT_GT(index_of_pipe, index_of_equals);
parsed_ids.insert(it->substr(index_of_equals + 1,
index_of_pipe - index_of_equals - 1));
}
// Verify that the resulting string contains each of the expected labels,
// and nothing more. Note that the date is stripped out and ignored.
for (std::vector<std::string>::const_iterator it =
expected_ids_list.begin(); it != expected_ids_list.end(); ++it) {
std::set<std::string>::iterator it2 = parsed_ids.find(*it);
EXPECT_TRUE(parsed_ids.end() != it2);
parsed_ids.erase(it2);
}
EXPECT_TRUE(parsed_ids.empty());
} // for
}
TEST(ExperimentLabelsTest, CombineExperimentLabels) {
struct {
const char* variations_labels;
const char* other_labels;
const char* expected_label;
} test_cases[] = {
{"A=B|Tue, 21 Jan 2014 15:30:21 GMT",
"C=D|Tue, 21 Jan 2014 15:30:21 GMT",
"C=D|Tue, 21 Jan 2014 15:30:21 GMT;A=B|Tue, 21 Jan 2014 15:30:21 GMT"},
{"A=B|Tue, 21 Jan 2014 15:30:21 GMT",
"",
"A=B|Tue, 21 Jan 2014 15:30:21 GMT"},
{"",
"A=B|Tue, 21 Jan 2014 15:30:21 GMT",
"A=B|Tue, 21 Jan 2014 15:30:21 GMT"},
{"A=B|Tue, 21 Jan 2014 15:30:21 GMT;C=D|Tue, 21 Jan 2014 15:30:21 GMT",
"P=Q|Tue, 21 Jan 2014 15:30:21 GMT;X=Y|Tue, 21 Jan 2014 15:30:21 GMT",
"P=Q|Tue, 21 Jan 2014 15:30:21 GMT;X=Y|Tue, 21 Jan 2014 15:30:21 GMT;"
"A=B|Tue, 21 Jan 2014 15:30:21 GMT;C=D|Tue, 21 Jan 2014 15:30:21 GMT"},
{"",
"",
""},
};
for (size_t i = 0; i < arraysize(test_cases); ++i) {
std::string result = base::UTF16ToUTF8(CombineExperimentLabels(
base::ASCIIToUTF16(test_cases[i].variations_labels),
base::ASCIIToUTF16(test_cases[i].other_labels)));
EXPECT_EQ(test_cases[i].expected_label, result);
}
}
TEST(ExperimentLabelsTest, ExtractNonVariationLabels) {
struct {
const char* input_label;
const char* expected_output;
} test_cases[] = {
// Empty
{"", ""},
// One
{"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT",
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT"},
// Three
{"CrVar1=123|Tue, 21 Jan 2014 15:30:21 GMT;"
"experiment1=456|Tue, 21 Jan 2014 15:30:21 GMT;"
"experiment2=789|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar1=123|Tue, 21 Jan 2014 15:30:21 GMT",
"experiment1=456|Tue, 21 Jan 2014 15:30:21 GMT;"
"experiment2=789|Tue, 21 Jan 2014 15:30:21 GMT"},
// One and one Variation
{"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar1=3310002|Tue, 21 Jan 2014 15:30:21 GMT",
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT"},
// One and one Variation, flipped
{"CrVar1=3310002|Tue, 21 Jan 2014 15:30:21 GMT;"
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT",
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT"},
// Sandwiched
{"CrVar1=3310002|Tue, 21 Jan 2014 15:30:21 GMT;"
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar2=3310003|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar3=3310004|Tue, 21 Jan 2014 15:30:21 GMT",
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT"},
// Only Variations
{"CrVar1=3310002|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar2=3310003|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar3=3310004|Tue, 21 Jan 2014 15:30:21 GMT",
""},
// Empty values
{"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar1=3310002|Tue, 21 Jan 2014 15:30:21 GMT",
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT"},
// Trailing semicolon
{"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT;"
"CrVar1=3310002|Tue, 21 Jan 2014 15:30:21 GMT;", // Note the semi here.
"gcapi_brand=123|Tue, 21 Jan 2014 15:30:21 GMT"},
// Semis
{";;;;", ""},
};
for (size_t i = 0; i < arraysize(test_cases); ++i) {
std::string non_variation_labels = base::UTF16ToUTF8(
ExtractNonVariationLabels(
base::ASCIIToUTF16(test_cases[i].input_label)));
EXPECT_EQ(test_cases[i].expected_output, non_variation_labels);
}
}
} // namespace chrome_variations
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