Activate prepopulated fieldtrials

chrome/common/variations/variations_util_unittest.cc

Index: chrome/common/variations/variations_util_unittest.cc
diff --git a/chrome/common/variations/variations_util_unittest.cc b/chrome/common/variations/variations_util_unittest.cc
index 6b4f9ec6db706aecd33faaebdd2b27f9b0165ecb..40d93f0bb5db7db80192b5ade53150dc01a30206 100644
--- a/chrome/common/variations/variations_util_unittest.cc
+++ b/chrome/common/variations/variations_util_unittest.cc
@@ -5,6 +5,7 @@
 #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"
 
@@ -44,4 +45,30 @@ TEST_F(VariationsUtilTest, AssociateParamsFromString) {
   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