Move language detection to a component

components/translate/common/translate_metrics_unittest.cc

Index: components/translate/common/translate_metrics_unittest.cc
diff --git a/components/translate/common/translate_metrics_unittest.cc b/components/translate/common/translate_metrics_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..dac4b09162d88f9c72dbd2f33a2ec03d20804fe4
--- /dev/null
+++ b/components/translate/common/translate_metrics_unittest.cc
@@ -0,0 +1,284 @@
+// 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/translate/common/translate_metrics.h"
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/metrics/histogram.h"
+#include "base/metrics/histogram_samples.h"
+#include "base/metrics/statistics_recorder.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+using base::HistogramBase;
+using base::HistogramSamples;
+using base::SampleCountIterator;
+using base::StatisticsRecorder;
+using base::TimeTicks;
+
+namespace {
+
+const int kTrue = 1;
+const int kFalse = 0;
+
+class MetricsRecorder {
+ public:
+  explicit MetricsRecorder(const char* key) : key_(key) {
+    StatisticsRecorder::Initialize();
+
+    HistogramBase* histogram = StatisticsRecorder::FindHistogram(key_);
+    if (histogram)
+      base_samples_ = histogram->SnapshotSamples();
+  }
+
+  void CheckLanguage(translate::MetricsNameIndex index,
+                     int expected_not_provided,
+                     int expected_valid,
+                     int expected_invalid) {
+    ASSERT_EQ(translate::GetMetricsName(index), key_);
+
+    Snapshot();
+
+    EXPECT_EQ(expected_not_provided,
+              GetCountWithoutSnapshot(translate::LANGUAGE_NOT_PROVIDED));
+    EXPECT_EQ(expected_valid,
+              GetCountWithoutSnapshot(translate::LANGUAGE_VALID));
+    EXPECT_EQ(expected_invalid,
+              GetCountWithoutSnapshot(translate::LANGUAGE_INVALID));
+  }
+
+  void CheckLanguageVerification(int expected_cld_disabled,
+                                 int expected_cld_only,
+                                 int expected_unknown,
+                                 int expected_cld_agree,
+                                 int expected_cld_disagree,
+                                 int expected_trust_cld,
+                                 int expected_cld_complement_sub_code) {
+    ASSERT_EQ(translate::GetMetricsName(translate::UMA_LANGUAGE_VERIFICATION),
+              key_);
+
+    Snapshot();
+
+    EXPECT_EQ(
+        expected_cld_disabled,
+        GetCountWithoutSnapshot(translate::LANGUAGE_VERIFICATION_CLD_DISABLED));
+    EXPECT_EQ(
+        expected_cld_only,
+        GetCountWithoutSnapshot(translate::LANGUAGE_VERIFICATION_CLD_ONLY));
+    EXPECT_EQ(
+        expected_unknown,
+        GetCountWithoutSnapshot(translate::LANGUAGE_VERIFICATION_UNKNOWN));
+    EXPECT_EQ(
+        expected_cld_agree,
+        GetCountWithoutSnapshot(translate::LANGUAGE_VERIFICATION_CLD_AGREE));
+    EXPECT_EQ(
+        expected_cld_disagree,
+        GetCountWithoutSnapshot(translate::LANGUAGE_VERIFICATION_CLD_DISAGREE));
+    EXPECT_EQ(
+        expected_trust_cld,
+        GetCountWithoutSnapshot(translate::LANGUAGE_VERIFICATION_TRUST_CLD));
+    EXPECT_EQ(expected_cld_complement_sub_code,
+              GetCountWithoutSnapshot(
+                  translate::LANGUAGE_VERIFICATION_CLD_COMPLEMENT_SUB_CODE));
+  }
+
+  void CheckScheme(int expected_http, int expected_https, int expected_others) {
+    ASSERT_EQ(translate::GetMetricsName(translate::UMA_PAGE_SCHEME), key_);
+
+    Snapshot();
+
+    EXPECT_EQ(expected_http, GetCountWithoutSnapshot(translate::SCHEME_HTTP));
+    EXPECT_EQ(expected_https, GetCountWithoutSnapshot(translate::SCHEME_HTTPS));
+    EXPECT_EQ(expected_others,
+              GetCountWithoutSnapshot(translate::SCHEME_OTHERS));
+  }
+
+  void CheckTotalCount(int count) {
+    Snapshot();
+    EXPECT_EQ(count, GetTotalCount());
+  }
+
+  void CheckValueInLogs(double value) {
+    Snapshot();
+    ASSERT_TRUE(samples_.get());
+    for (scoped_ptr<SampleCountIterator> i = samples_->Iterator(); !i->Done();
+         i->Next()) {
+      HistogramBase::Sample min;
+      HistogramBase::Sample max;
+      HistogramBase::Count count;
+      i->Get(&min, &max, &count);
+      if (min <= value && value <= max && count >= 1)
+        return;
+    }
+    EXPECT_FALSE(true);
+  }
+
+  HistogramBase::Count GetCount(HistogramBase::Sample value) {
+    Snapshot();
+    return GetCountWithoutSnapshot(value);
+  }
+
+ private:
+  void Snapshot() {
+    HistogramBase* histogram = StatisticsRecorder::FindHistogram(key_);
+    if (!histogram)
+      return;
+    samples_ = histogram->SnapshotSamples();
+  }
+
+  HistogramBase::Count GetCountWithoutSnapshot(HistogramBase::Sample value) {
+    if (!samples_.get())
+      return 0;
+    HistogramBase::Count count = samples_->GetCount(value);
+    if (!base_samples_.get())
+      return count;
+    return count - base_samples_->GetCount(value);
+  }
+
+  HistogramBase::Count GetTotalCount() {
+    if (!samples_.get())
+      return 0;
+    HistogramBase::Count count = samples_->TotalCount();
+    if (!base_samples_.get())
+      return count;
+    return count - base_samples_->TotalCount();
+  }
+
+  std::string key_;
+  scoped_ptr<HistogramSamples> base_samples_;
+  scoped_ptr<HistogramSamples> samples_;
+
+  DISALLOW_COPY_AND_ASSIGN(MetricsRecorder);
+};
+
+}  // namespace
+
+TEST(TranslateMetricsTest, ReportContentLanguage) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_CONTENT_LANGUAGE));
+
+  recorder.CheckLanguage(translate::UMA_CONTENT_LANGUAGE, 0, 0, 0);
+  translate::ReportContentLanguage(std::string(), std::string());
+  recorder.CheckLanguage(translate::UMA_CONTENT_LANGUAGE, 1, 0, 0);
+  translate::ReportContentLanguage("ja_JP", "ja-JP");
+  recorder.CheckLanguage(translate::UMA_CONTENT_LANGUAGE, 1, 0, 1);
+  translate::ReportContentLanguage("en", "en");
+  recorder.CheckLanguage(translate::UMA_CONTENT_LANGUAGE, 1, 1, 1);
+}
+
+TEST(TranslateMetricsTest, ReportHtmlLang) {
+  MetricsRecorder recorder(translate::GetMetricsName(translate::UMA_HTML_LANG));
+
+  recorder.CheckLanguage(translate::UMA_HTML_LANG, 0, 0, 0);
+  translate::ReportHtmlLang(std::string(), std::string());
+  recorder.CheckLanguage(translate::UMA_HTML_LANG, 1, 0, 0);
+  translate::ReportHtmlLang("ja_JP", "ja-JP");
+  recorder.CheckLanguage(translate::UMA_HTML_LANG, 1, 0, 1);
+  translate::ReportHtmlLang("en", "en");
+  recorder.CheckLanguage(translate::UMA_HTML_LANG, 1, 1, 1);
+}
+
+TEST(TranslateMetricsTest, ReportLanguageVerification) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_LANGUAGE_VERIFICATION));
+
+  recorder.CheckLanguageVerification(0, 0, 0, 0, 0, 0, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_CLD_DISABLED);
+  recorder.CheckLanguageVerification(1, 0, 0, 0, 0, 0, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_CLD_ONLY);
+  recorder.CheckLanguageVerification(1, 1, 0, 0, 0, 0, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_UNKNOWN);
+  recorder.CheckLanguageVerification(1, 1, 1, 0, 0, 0, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_CLD_AGREE);
+  recorder.CheckLanguageVerification(1, 1, 1, 1, 0, 0, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_CLD_DISAGREE);
+  recorder.CheckLanguageVerification(1, 1, 1, 1, 1, 0, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_TRUST_CLD);
+  recorder.CheckLanguageVerification(1, 1, 1, 1, 1, 1, 0);
+  translate::ReportLanguageVerification(
+      translate::LANGUAGE_VERIFICATION_CLD_COMPLEMENT_SUB_CODE);
+  recorder.CheckLanguageVerification(1, 1, 1, 1, 1, 1, 1);
+}
+
+TEST(TranslateMetricsTest, ReportTimeToBeReady) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_TIME_TO_BE_READY));
+  recorder.CheckTotalCount(0);
+  translate::ReportTimeToBeReady(3.14);
+  recorder.CheckValueInLogs(3.14);
+  recorder.CheckTotalCount(1);
+}
+
+TEST(TranslateMetricsTest, ReportTimeToLoad) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_TIME_TO_LOAD));
+  recorder.CheckTotalCount(0);
+  translate::ReportTimeToLoad(573.0);
+  recorder.CheckValueInLogs(573.0);
+  recorder.CheckTotalCount(1);
+}
+
+TEST(TranslateMetricsTest, ReportTimeToTranslate) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_TIME_TO_TRANSLATE));
+  recorder.CheckTotalCount(0);
+  translate::ReportTimeToTranslate(4649.0);
+  recorder.CheckValueInLogs(4649.0);
+  recorder.CheckTotalCount(1);
+}
+
+TEST(TranslateMetricsTest, ReportUserActionDuration) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_USER_ACTION_DURATION));
+  recorder.CheckTotalCount(0);
+  TimeTicks begin = TimeTicks::Now();
+  TimeTicks end = begin + base::TimeDelta::FromSeconds(3776);
+  translate::ReportUserActionDuration(begin, end);
+  recorder.CheckValueInLogs(3776000.0);
+  recorder.CheckTotalCount(1);
+}
+
+TEST(TranslateMetricsTest, ReportPageScheme) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_PAGE_SCHEME));
+  recorder.CheckScheme(0, 0, 0);
+  translate::ReportPageScheme("http");
+  recorder.CheckScheme(1, 0, 0);
+  translate::ReportPageScheme("https");
+  recorder.CheckScheme(1, 1, 0);
+  translate::ReportPageScheme("ftp");
+  recorder.CheckScheme(1, 1, 1);
+}
+
+TEST(TranslateMetricsTest, ReportSimilarLanguageMatch) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_SIMILAR_LANGUAGE_MATCH));
+  recorder.CheckTotalCount(0);
+  EXPECT_EQ(0, recorder.GetCount(kTrue));
+  EXPECT_EQ(0, recorder.GetCount(kFalse));
+  translate::ReportSimilarLanguageMatch(true);
+  EXPECT_EQ(1, recorder.GetCount(kTrue));
+  EXPECT_EQ(0, recorder.GetCount(kFalse));
+  translate::ReportSimilarLanguageMatch(false);
+  EXPECT_EQ(1, recorder.GetCount(kTrue));
+  EXPECT_EQ(1, recorder.GetCount(kFalse));
+}
+
+TEST(TranslateMetricsTest, ReportLanguageDetectionTime) {
+  MetricsRecorder recorder(
+      translate::GetMetricsName(translate::UMA_LANGUAGE_DETECTION));
+  recorder.CheckTotalCount(0);
+  TimeTicks begin = TimeTicks::Now();
+  TimeTicks end = begin + base::TimeDelta::FromMicroseconds(9009);
+  translate::ReportLanguageDetectionTime(begin, end);
+  recorder.CheckValueInLogs(9.009);
+  recorder.CheckTotalCount(1);
+}