Metrics for document.write script blocking

chrome/browser/page_load_metrics/page_load_metrics_browsertest.cc

 // Copyright (c) 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 "base/macros.h"
 #include "base/test/histogram_tester.h"
 #include "chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h"
 #include "chrome/browser/page_load_metrics/observers/document_write_page_load_metrics_observer.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 79 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest, NoDocumentWrite) {
   ASSERT_TRUE(embedded_test_server()->Start());
 
   ui_test_utils::NavigateToURL(browser(),
                                embedded_test_server()->GetURL("/title1.html"));
   ui_test_utils::NavigateToURL(browser(),
                                embedded_test_server()->GetURL("/title2.html"));
   histogram_tester_.ExpectTotalCount(
       internal::kHistogramDocWriteParseStartToFirstContentfulPaint, 0);
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 0);
 }
+
+IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest,
+                       DocumentWriteBlock) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_script_block.html"));
+
+  ui_test_utils::NavigateToURL(browser(),
+                               embedded_test_server()->GetURL("/title2.html"));
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 1);
+}
+
+IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest,
+                       DocumentWriteReload) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_script_block.html"));
+
+  // Reload should not log the histogram as the script is not blocked.
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_script_block.html"));
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_script_block.html"));
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 1);
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockReloadCount, 1);
+
+  ui_test_utils::NavigateToURL(browser(),
+                               embedded_test_server()->GetURL("/title2.html"));
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 1);
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockReloadCount, 2);
+}
+
+IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest,
+                       DocumentWriteASync) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_script_async.html"));
+  ui_test_utils::NavigateToURL(browser(),
+                               embedded_test_server()->GetURL("/title2.html"));
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 0);
+}
+
+IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest,
+                       DocumentWriteSameDomain) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_external_script.html"));
+  ui_test_utils::NavigateToURL(browser(),
+                               embedded_test_server()->GetURL("/title2.html"));
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 0);
+}
+
+IN_PROC_BROWSER_TEST_F(MetricsWebContentsObserverBrowserTest,
+                       NoDocumentWriteScript) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  ui_test_utils::NavigateToURL(
+      browser(), embedded_test_server()->GetURL(
+                     "/page_load_metrics/document_write_no_script.html"));
+  ui_test_utils::NavigateToURL(browser(),
+                               embedded_test_server()->GetURL("/title2.html"));
+
+  histogram_tester_.ExpectTotalCount(
+      internal::kHistogramDocWriteBlockParseStartToFirstContentfulPaint, 0);
+}