Activate prepopulated fieldtrials

chrome/common/variations/variations_util_unittest.cc

 // 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 "chrome/common/variations/variations_util.h"
 
 #include "base/metrics/field_trial.h"
+#include "chrome/common/variations/fieldtrial_testing_config.h"
 #include "components/variations/variations_associated_data.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chrome_variations {
 
 class VariationsUtilTest : public ::testing::Test {
  public:
   VariationsUtilTest() : field_trial_list_(NULL) {}
 
   ~VariationsUtilTest() override {
@@ skipping 19 matching lines @@
   EXPECT_EQ("/", variations::GetVariationParamValue(kTrialName, "a"));
   EXPECT_EQ(std::string(), variations::GetVariationParamValue(kTrialName, "b"));
   EXPECT_EQ(std::string(), variations::GetVariationParamValue(kTrialName, "x"));
 
   std::map<std::string, std::string> params;
   EXPECT_TRUE(variations::GetVariationParams(kTrialName, &params));
   EXPECT_EQ(1U, params.size());
   EXPECT_EQ("/", params["a"]);
 }
 
+TEST_F(VariationsUtilTest, AssociateParamsFromFieldTrialConfig) {
+  const FieldTrialGroupParams array_kFieldTrialConfig_params[] = {{"x", "1"},
+                                                                  {"y", "2"}};
+
+  const FieldTrialTestingGroup array_kFieldTrialConfig_groups[] = {
+      {"TestStudy1", "TestGroup1", array_kFieldTrialConfig_params, 2},
+      {"TestStudy2", "TestGroup2", NULL, 0}};
+
+  const FieldTrialTestingConfig kConfig = {
+      array_kFieldTrialConfig_groups, 2,
+  };
+  AssociateParamsFromFieldTrialConfig(kConfig);
+
+  EXPECT_EQ("1", variations::GetVariationParamValue("TestStudy1", "x"));
+  EXPECT_EQ("2", variations::GetVariationParamValue("TestStudy1", "y"));
+
+  std::map<std::string, std::string> params;
+  EXPECT_TRUE(variations::GetVariationParams("TestStudy1", &params));
+  EXPECT_EQ(2U, params.size());
+  EXPECT_EQ("1", params["x"]);
+  EXPECT_EQ("2", params["y"]);
+
+  EXPECT_EQ("TestGroup1", base::FieldTrialList::FindFullName("TestStudy1"));
+  EXPECT_EQ("TestGroup2", base::FieldTrialList::FindFullName("TestStudy2"));
+}
+
 }  // namespace chrome_variations