Log observations of explicit UPI-VPA autocomplete hints.

components/autofill/core/browser/autofill_metrics_unittest.cc

 // 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/autofill/core/browser/autofill_metrics.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
@@ skipping 1415 matching lines @@
   autofill_manager_->Reset();
   autofill_manager_->RunRunLoop();
 
   // An autofillable form was uploaded, and the number of edited autofilled
   // fields is logged.
   histogram_tester.ExpectUniqueSample(
       "Autofill.NumberOfEditedAutofilledFieldsAtSubmission.NoSubmission", 1, 1);
 }
 
 // Verify that we correctly log metrics regarding developer engagement.
 TEST_F(AutofillMetricsTest, DeveloperEngagement) {

[Mathieu, 2017/03/23 11:26:22]

Please mirror your test on this one.

[Roger McFarlane (Chromium), 2017/03/28 19:08:23]

Done.

   // Start with a non-fillable form.
   FormData form;
   form.name = ASCIIToUTF16("TestForm");
   form.origin = GURL("http://example.com/form.html");
   form.action = GURL("http://example.com/submit.html");
 
   FormFieldData field;
   test::CreateTestFormField("Name", "name", "", "text", &field);
   form.fields.push_back(field);
   test::CreateTestFormField("Email", "email", "", "text", &field);
@@ skipping 2912 matching lines @@
         "Autofill.FormEvents.CreditCard",
         AutofillMetrics::FORM_EVENT_NO_SUGGESTION_SUBMITTED_ONCE, 1);
     // Check that the nonsecure histogram was not recorded. ExpectBucketCount()
     // can't be used here because it expects the histogram to exist.
     EXPECT_EQ(
         0, histograms.GetTotalCountsForPrefix("Autofill.FormEvents.CreditCard")
                ["Autofill.FormEvents.CreditCard.OnNonsecurePage"]);
   }
 }
 
+// Tests that logging an explicit UPI-VPA hint works as expected.
+TEST_F(AutofillMetricsTest, LogExplicitUpiVpaHint) {
+  constexpr int kNumHints = 5;
+  base::HistogramTester histograms;
+  for (int i = 0; i < kNumHints; ++i)
+    AutofillMetrics::LogExplicitUpiVpaHint();
+  histograms.ExpectBucketCount("Autofill.ExplicitUpiVpaHint",
+                               static_cast<int>(false), 0);
+  histograms.ExpectBucketCount("Autofill.ExplicitUpiVpaHint",
+                               static_cast<int>(true), kNumHints);
+}
+
 // Tests that logging a UKM works as expected.
 TEST_F(AutofillMetricsTest, RecordCardUploadDecisionMetric) {
   EnableUkmLogging();
   ukm::UkmServiceTestingHarness ukm_service_test_harness;
   GURL url("https://www.google.com");
   int upload_decision = 1;
   std::map<std::string, int> metrics;
   metrics.insert(std::make_pair(internal::kUKMCardUploadDecisionMetricName,
                                 upload_decision));
 
@@ skipping 72 matching lines @@
   GURL url("https://www.google.com");
   std::map<std::string, int> metrics;
   metrics.insert(std::make_pair("metric", 1));
 
   EXPECT_FALSE(AutofillMetrics::LogUkm(
       ukm_service_test_harness.test_ukm_service(), url, "test_ukm", metrics));
   EXPECT_EQ(0U, ukm_service_test_harness.test_ukm_service()->sources_count());
 }
 
 }  // namespace autofill