Add StaleWhileRevalidateExperiment histograms.

net/base/stale_while_revalidate_experiment_domains_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 "net/base/stale_while_revalidate_experiment_domains.h"
+
+#include <iosfwd>
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+
+namespace {
+
+using ::testing::TestWithParam;
+using ::testing::ValuesIn;
+
+const struct Expectation {
+  const char* host;
+  bool result;
+} kExpectations[] = {
+    {"wordpress.com", true},
+    {"issuu.com", true},
+    {"wordpress.com.", true},
+    {"www.wordpress.com", true},
+    {"www.wordpress.com.", true},
+    {"a.b.wordpress.com", true},
+    {"a.b.c.d.wordpress.com", true},
+    {"www..wordpress.com", true},
+    {"www.wordpress..com", false},
+    {"a-b-wordpress.com", false},
+    {"com", false},
+    {".", false},
+    {"", false},
+    {"..", false},
+    {"ordpress.com", false},
+    {"wordpress.co", false},
+    {"a", false},
+    {"a.b", false},
+    {"a.b.c", false},
+    {"a.b.c.d.e", false},
+};
+
+void PrintTo(const Expectation& expectation, std::ostream* os) {
+  *os << "{\"" << expectation.host << "\" ," << std::boolalpha
+      << expectation.result << "}";
+}
+
+class MatchTest : public TestWithParam<Expectation> {};
+
+TEST_P(MatchTest, CheckExpectation) {
+  const Expectation& expectation = GetParam();
+  EXPECT_EQ(expectation.result,
+            IsHostInStaleWhileRevalidateExperimentDomain(expectation.host));
+}
+
+INSTANTIATE_TEST_CASE_P(StaleWhileRevalidateExperimentDomainsTest,
+                        MatchTest,
+                        ValuesIn(kExpectations));
+
+}  // namespace
+
+}  // namespace net