Componentize spellcheck [4]: spellcheck/browser and android java-side.

chrome/browser/spellchecker/spellcheck_host_metrics_unittest.cc

-// Copyright (c) 2012 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/spellchecker/spellcheck_host_metrics.h"
-
-#include <stddef.h>
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/message_loop/message_loop.h"
-#include "base/metrics/histogram_samples.h"
-#include "base/metrics/statistics_recorder.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/test/histogram_tester.h"
-#include "build/build_config.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-#if defined(OS_WIN)
-// For version specific disabled tests below (http://crbug.com/230534).
-#include "base/win/windows_version.h"
-#endif
-
-class SpellcheckHostMetricsTest : public testing::Test {
- public:
-  SpellcheckHostMetricsTest() {
-  }
-
-  static void SetUpTestCase() {
-    base::StatisticsRecorder::Initialize();
-  }
-
-  void SetUp() override { metrics_.reset(new SpellCheckHostMetrics); }
-
-  SpellCheckHostMetrics* metrics() { return metrics_.get(); }
-  void RecordWordCountsForTesting() { metrics_->RecordWordCounts(); }
-
- private:
-  base::MessageLoop loop_;
-  std::unique_ptr<SpellCheckHostMetrics> metrics_;
-};
-
-TEST_F(SpellcheckHostMetricsTest, RecordEnabledStats) {
-  const char kMetricName[] = "SpellCheck.Enabled";
-  base::HistogramTester histogram_tester1;
-
-  metrics()->RecordEnabledStats(false);
-
-  histogram_tester1.ExpectBucketCount(kMetricName, 0, 1);
-  histogram_tester1.ExpectBucketCount(kMetricName, 1, 0);
-
-  base::HistogramTester histogram_tester2;
-
-  metrics()->RecordEnabledStats(true);
-
-  histogram_tester2.ExpectBucketCount(kMetricName, 0, 0);
-  histogram_tester2.ExpectBucketCount(kMetricName, 1, 1);
-}
-
-TEST_F(SpellcheckHostMetricsTest, CustomWordStats) {
-#if defined(OS_WIN)
-// Failing consistently on Win7. See crbug.com/230534.
-  if (base::win::GetVersion() >= base::win::VERSION_VISTA)
-    return;
-#endif
-  SpellCheckHostMetrics::RecordCustomWordCountStats(123);
-
-  // Determine if test failures are due the statistics recorder not being
-  // available or because the histogram just isn't there: crbug.com/230534.
-  EXPECT_TRUE(base::StatisticsRecorder::IsActive());
-
-  base::HistogramTester histogram_tester;
-
-  SpellCheckHostMetrics::RecordCustomWordCountStats(23);
-  histogram_tester.ExpectBucketCount("SpellCheck.CustomWords", 23, 1);
-}
-
-TEST_F(SpellcheckHostMetricsTest, RecordWordCountsDiscardsDuplicates) {
-  // This test ensures that RecordWordCounts only records metrics if they
-  // have changed from the last invocation.
-  const char* const histogram_names[] = {
-      "SpellCheck.CheckedWords", "SpellCheck.MisspelledWords",
-      "SpellCheck.ReplacedWords", "SpellCheck.UniqueWords",
-      "SpellCheck.ShownSuggestions"};
-
-  // Ensure all histograms exist.
-  metrics()->RecordCheckedWordStats(base::ASCIIToUTF16("test"), false);
-  RecordWordCountsForTesting();
-
-  // Create the tester, taking a snapshot of current histogram samples.
-  base::HistogramTester histogram_tester;
-
-  // Nothing changed, so this invocation should not affect any histograms.
-  RecordWordCountsForTesting();
-
-  // Get samples for all affected histograms.
-  for (size_t i = 0; i < arraysize(histogram_names); ++i)
-    histogram_tester.ExpectTotalCount(histogram_names[i], 0);
-}
-
-TEST_F(SpellcheckHostMetricsTest, RecordSpellingServiceStats) {
-  const char kMetricName[] = "SpellCheck.SpellingService.Enabled";
-  base::HistogramTester histogram_tester1;
-
-  metrics()->RecordSpellingServiceStats(false);
-
-  histogram_tester1.ExpectBucketCount(kMetricName, 0, 1);
-  histogram_tester1.ExpectBucketCount(kMetricName, 1, 0);
-
-  base::HistogramTester histogram_tester2;
-
-  metrics()->RecordSpellingServiceStats(true);
-  histogram_tester2.ExpectBucketCount(kMetricName, 0, 0);
-  histogram_tester2.ExpectBucketCount(kMetricName, 1, 1);
-}