Increase test coverage for Navigation.MainFrameSchemeDifferentPage

components/navigation_metrics/navigation_metrics_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 "components/navigation_metrics/navigation_metrics.h"
+
+#include "base/test/histogram_tester.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace {
+const char* const kTestUrl = "http://www.example.com";
+const char* const kMainFrameScheme = "Navigation.MainFrameScheme";
+const char* const kMainFrameSchemeDifferentPage =
+    "Navigation.MainFrameSchemeDifferentPage";
+
+}  // namespace
+
+namespace navigation_metrics {
+
+TEST(NavigationMetrics, MainFrameSchemeDifferentPage) {
+  base::HistogramTester test;
+
+  RecordMainFrameNavigation(GURL(kTestUrl), false, false, false);
+
+  test.ExpectTotalCount(kMainFrameScheme, 1);
+  test.ExpectUniqueSample(kMainFrameScheme, 1 /* http */, 1);
+  test.ExpectTotalCount(kMainFrameSchemeDifferentPage, 1);
+  test.ExpectUniqueSample(kMainFrameSchemeDifferentPage, 1 /* http */, 1);
+}
+
+TEST(NavigationMetrics, MainFrameSchemeSamePage) {
+  base::HistogramTester test;
+
+  RecordMainFrameNavigation(GURL(kTestUrl), true, false, false);
+
+  test.ExpectTotalCount(kMainFrameScheme, 1);
+  test.ExpectUniqueSample(kMainFrameScheme, 1 /* http */, 1);
+  test.ExpectTotalCount(kMainFrameSchemeDifferentPage, 0);
+}
+
+}  // namespace navigation_metrics