Various cleaups for AMP page load metrics.

chrome/browser/page_load_metrics/page_load_metrics_util_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/browser/page_load_metrics/page_load_metrics_util.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+class PageLoadMetricsUtilTest : public testing::Test {};
+
+TEST_F(PageLoadMetricsUtilTest, IsGoogleHostname) {
+  struct {
+    bool expected_result;
+    const char* url;
+  } test_cases[] = {
+      {true, "https://google.com/"},
+      {true, "https://google.com/index.html"},
+      {true, "https://www.google.com/"},
+      {true, "https://www.google.com/search"},
+      {true, "https://www.google.com/a/b/c/d"},
+      {true, "https://www.google.co.uk/"},
+      {true, "https://www.google.co.in/"},
+      {true, "https://other.google.com/"},
+      {true, "https://other.www.google.com/"},
+      {true, "https://www.other.google.com/"},
+      {true, "https://www.www.google.com/"},
+      {false, ""},
+      {false, "a"},
+      {false, "*"},
+      {false, "com"},
+      {false, "co.uk"},
+      {false, "google"},
+      {false, "google.com"},
+      {false, "www.google.com"},
+      {false, "https:///"},
+      {false, "https://a/"},
+      {false, "https://*/"},
+      {false, "https://com/"},
+      {false, "https://co.uk/"},
+      {false, "https://google/"},
+      {false, "https://*.com/"},
+      {false, "https://www.*.com/"},
+      {false, "https://www.google.appspot.com/"},
+      {false, "https://www.google.example.com/"},
+  };
+  for (const auto& test : test_cases) {
+    EXPECT_EQ(test.expected_result,
+              page_load_metrics::IsGoogleHostname(GURL(test.url)))
+        << "For URL: " << test.url;
+  }
+}
+
+TEST_F(PageLoadMetricsUtilTest, GetGoogleHostnamePrefix) {
+  struct {
+    bool expected_result;
+    const char* expected_prefix;
+    const char* url;
+  } test_cases[] = {
+      {false, "", "https://example.com/"},
+      {true, "", "https://google.com/"},
+      {true, "www", "https://www.google.com/"},
+      {true, "news", "https://news.google.com/"},
+      {true, "www", "https://www.google.co.uk/"},
+      {true, "other", "https://other.google.com/"},
+      {true, "other.www", "https://other.www.google.com/"},
+      {true, "www.other", "https://www.other.google.com/"},
+      {true, "www.www", "https://www.www.google.com/"},
+  };
+  for (const auto& test : test_cases) {
+    base::Optional<std::string> result =
+        page_load_metrics::GetGoogleHostnamePrefix(GURL(test.url));
+    EXPECT_EQ(test.expected_result, result.has_value())
+        << "For URL: " << test.url;
+    if (result) {
+      EXPECT_EQ(test.expected_prefix, result.value())
+          << "Prefix for URL: " << test.url;
+    }
+  }
+}