Adding ExperimentLabels helper class.

chrome/installer/util/experiment_labels_unittest.cc

+// Copyright 2017 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/installer/util/experiment_labels.h"
+
+#include "base/strings/string_piece.h"
+#include "base/time/time.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::testing::HasSubstr;
+using ::testing::StartsWith;
+using ::testing::StrEq;
+
+namespace installer {
+
+TEST(ExperimentLabels, value) {

[Patrick Monette, 2017/05/08 15:27:48]

s/value/Value?

I have never seen a test name with a lower case name.

[grt (UTC plus 2), 2017/05/08 20:15:26]

Done. I did that 'cause the method it is testing is lower-case. I guess it does
look odd.

+  static constexpr wchar_t kDummyValue[] =
+      L"name=value|Fri, 14 Aug 2015 16:13:03 GMT";
+  ExperimentLabels labels(kDummyValue);
+
+  EXPECT_THAT(labels.value(), StrEq(kDummyValue));
+}
+
+TEST(ExperimentLabels, GetValueForLabel) {
+  static constexpr wchar_t kDummyValue[] =
+      L"name=value|Fri, 14 Aug 2015 16:13:03 GMT;"
+      L"name2=value2|Fri, 14 Aug 2015 16:13:03 GMT";
+  ExperimentLabels labels(kDummyValue);
+
+  base::StringPiece16 value = labels.GetValueForLabel(L"name");
+  EXPECT_THAT(value.as_string().c_str(), StrEq(L"value"));
+
+  value = labels.GetValueForLabel(L"name2");
+  EXPECT_THAT(value.as_string().c_str(), StrEq(L"value2"));
+
+  value = labels.GetValueForLabel(L"name3");
+  EXPECT_TRUE(value.empty());
+}
+
+TEST(ExperimentLabels, SetValueForLabel) {
+  ExperimentLabels label(L"");
+
+  label.SetValueForLabel(L"name", L"value", base::TimeDelta::FromSeconds(1));
+  base::StringPiece16 value = label.GetValueForLabel(L"name");
+  EXPECT_THAT(value.as_string().c_str(), StrEq(L"value"));
+  EXPECT_THAT(label.value(), StartsWith(L"name=value|"));
+
+  label.SetValueForLabel(L"name", L"othervalue",
+                         base::TimeDelta::FromSeconds(1));
+  value = label.GetValueForLabel(L"name");
+  EXPECT_THAT(value.as_string().c_str(), StrEq(L"othervalue"));
+  EXPECT_THAT(label.value(), StartsWith(L"name=othervalue|"));
+
+  label.SetValueForLabel(L"othername", L"somevalue",
+                         base::TimeDelta::FromSeconds(1));
+  value = label.GetValueForLabel(L"othername");
+  EXPECT_THAT(value.as_string().c_str(), StrEq(L"somevalue"));
+  EXPECT_THAT(label.value(), HasSubstr(L"name=othervalue|"));
+  EXPECT_THAT(label.value(), HasSubstr(L"othername=somevalue|"));
+}
+
+TEST(ExperimentLabels, TimeFormatting) {
+  base::Time::Exploded exploded = {};
+  exploded.year = 2015;
+  exploded.month = 8;
+  exploded.day_of_week = 5;
+  exploded.day_of_month = 14;
+  exploded.hour = 16;
+  exploded.minute = 13;
+  exploded.second = 3;
+
+  base::Time time;
+  ASSERT_TRUE(base::Time::FromUTCExploded(exploded, &time));
+
+  ExperimentLabels label(L"");
+  label.SetValueForLabel(L"name", L"value", time);
+  EXPECT_THAT(label.value(),
+              StrEq(L"name=value|Fri, 14 Aug 2015 16:13:03 GMT"));
+}
+
+}  // namespace installer