Move password_manager_metrics_util_unittest.cc to its component

Also do a necessary reformatting to pass the presubmit test.

BUG=514209

Review URL: https://codereview.chromium.org/1254273002

Cr-Commit-Position: refs/heads/master@{#340660}

2 files changed, 81 insertions, 0 deletions

diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index 246ff17..aa40d13 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -388,6 +388,7 @@
       'password_manager/core/browser/password_autofill_manager_unittest.cc',
       'password_manager/core/browser/password_form_manager_unittest.cc',
       'password_manager/core/browser/password_generation_manager_unittest.cc',
+      'password_manager/core/browser/password_manager_metrics_util_unittest.cc',
       'password_manager/core/browser/password_manager_unittest.cc',
       'password_manager/core/browser/password_store_default_unittest.cc',
       'password_manager/core/browser/password_store_unittest.cc',
diff --git a/components/password_manager/core/browser/password_manager_metrics_util_unittest.cc b/components/password_manager/core/browser/password_manager_metrics_util_unittest.cc
new file mode 100644
index 0000000..d71aa3d
--- /dev/null
+++ b/components/password_manager/core/browser/password_manager_metrics_util_unittest.cc
@@ -0,0 +1,80 @@
+// Copyright 2013 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 "components/password_manager/core/browser/password_manager_metrics_util.h"
+
+#include <map>
+
+#include "base/macros.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/scoped_user_pref_update.h"
+#include "base/prefs/testing_pref_service.h"
+#include "base/values.h"
+#include "components/password_manager/core/common/password_manager_pref_names.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace password_manager {
+
+class PasswordManagerMetricsUtilTest : public testing::Test {
+ protected:
+  void SetUp() override {
+    testing::Test::SetUp();
+    prefs_.registry()->RegisterListPref(
+        prefs::kPasswordManagerGroupsForDomains);
+  }
+
+  bool IsMonitored(const char* url_host) {
+    size_t group_id = metrics_util::MonitoredDomainGroupId(url_host, &prefs_);
+    return group_id > 0;
+  }
+
+  TestingPrefServiceSimple prefs_;
+};
+
+TEST_F(PasswordManagerMetricsUtilTest, MonitoredDomainGroupAssigmentTest) {
+  const char* const kMonitoredWebsites[] = {
+      "https://www.google.com",   "https://www.yahoo.com",
+      "https://www.baidu.com",    "https://www.wikipedia.org",
+      "https://www.linkedin.com", "https://www.twitter.com",
+      "https://www.facebook.com", "https://www.amazon.com",
+      "https://www.ebay.com",     "https://www.tumblr.com",
+  };
+  const size_t kMonitoredWebsitesLength = arraysize(kMonitoredWebsites);
+
+  // |groups| maps the group id to the number of times the group gets assigned.
+  std::map<size_t, size_t> groups;
+
+  // Provide all possible values of the group id parameter for each monitored
+  // website.
+  for (size_t i = 0; i < kMonitoredWebsitesLength; ++i) {
+    for (size_t j = 0; j < metrics_util::kGroupsPerDomain; ++j) {
+      {  // Set the group index for domain |i| to |j|.
+        ListPrefUpdate group_indices(&prefs_,
+                                     prefs::kPasswordManagerGroupsForDomains);
+        group_indices->Set(i, new base::FundamentalValue(static_cast<int>(j)));
+      }  // At the end of the scope the prefs get updated.
+
+      ++groups[metrics_util::MonitoredDomainGroupId(kMonitoredWebsites[i],
+                                                    &prefs_)];
+    }
+  }
+  // None of the monitored websites should have been assigned group ID 0.
+  EXPECT_EQ(0u, groups.count(0));
+
+  // Check if all groups get assigned the same number of times.
+  size_t number_of_assigments = groups.begin()->second;
+  for (auto it = groups.begin(); it != groups.end(); ++it) {
+    EXPECT_EQ(it->second, number_of_assigments) << " group id = " << it->first;
+  }
+}
+
+TEST_F(PasswordManagerMetricsUtilTest, MonitoredDomainGroupTest) {
+  EXPECT_TRUE(IsMonitored("https://www.linkedin.com"));
+  EXPECT_TRUE(IsMonitored("https://www.amazon.com"));
+  EXPECT_TRUE(IsMonitored("https://www.facebook.com"));
+  EXPECT_TRUE(IsMonitored("http://wikipedia.org"));
+  EXPECT_FALSE(IsMonitored("http://thisisnotwikipedia.org"));
+}
+
+}  // namespace password_manager