chrome/browser/chrome_browser_application_mac_unittest.mm

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import <Cocoa/Cocoa.h>
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/metrics/histogram_samples.h"
  10 #include "base/metrics/statistics_recorder.h"
  11 #import "chrome/browser/chrome_browser_application_mac.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 using base::HistogramBase;
  15 using base::HistogramSamples;
  16 using base::StatisticsRecorder;
  17
  18 namespace chrome_browser_application_mac {
  19
  20 // Generate an NSException with the given name.
  21 NSException* ExceptionNamed(NSString* name) {
  22   return [NSException exceptionWithName:name
  23                                  reason:@"No reason given"
  24                                userInfo:nil];
  25 }
  26
  27 // Helper to keep binning expectations readible.
  28 size_t BinForExceptionNamed(NSString* name) {
  29   return BinForException(ExceptionNamed(name));
  30 }
  31
  32 TEST(ChromeApplicationMacTest, ExceptionBinning) {
  33   // These exceptions must be in this order.
  34   EXPECT_EQ(BinForExceptionNamed(NSGenericException), 0U);
  35   EXPECT_EQ(BinForExceptionNamed(NSRangeException), 1U);
  36   EXPECT_EQ(BinForExceptionNamed(NSInvalidArgumentException), 2U);
  37   EXPECT_EQ(BinForExceptionNamed(NSMallocException), 3U);
  38
  39   // Random other exceptions map to |kUnknownNSException|.
  40   EXPECT_EQ(BinForExceptionNamed(@"CustomName"), kUnknownNSException);
  41   EXPECT_EQ(BinForExceptionNamed(@"Custom Name"), kUnknownNSException);
  42   EXPECT_EQ(BinForExceptionNamed(@""), kUnknownNSException);
  43   EXPECT_EQ(BinForException(nil), kUnknownNSException);
  44 }
  45
  46 TEST(ChromeApplicationMacTest, RecordException) {
  47   // Start up a histogram recorder.
  48   // TODO(rtenneti): Leaks StatisticsRecorder and will update suppressions.
  49   base::StatisticsRecorder::Initialize();
  50
  51   StatisticsRecorder::Histograms histograms;
  52   StatisticsRecorder::GetSnapshot("OSX.NSException", &histograms);
  53   EXPECT_EQ(0U, histograms.size());
  54
  55   // Record some known exceptions.
  56   RecordExceptionWithUma(ExceptionNamed(NSGenericException));
  57   RecordExceptionWithUma(ExceptionNamed(NSGenericException));
  58   RecordExceptionWithUma(ExceptionNamed(NSGenericException));
  59   RecordExceptionWithUma(ExceptionNamed(NSGenericException));
  60   RecordExceptionWithUma(ExceptionNamed(NSRangeException));
  61   RecordExceptionWithUma(ExceptionNamed(NSInvalidArgumentException));
  62   RecordExceptionWithUma(ExceptionNamed(NSInvalidArgumentException));
  63   RecordExceptionWithUma(ExceptionNamed(NSInvalidArgumentException));
  64   RecordExceptionWithUma(ExceptionNamed(NSMallocException));
  65   RecordExceptionWithUma(ExceptionNamed(NSMallocException));
  66
  67   // Record some unknown exceptions.
  68   RecordExceptionWithUma(ExceptionNamed(@"CustomName"));
  69   RecordExceptionWithUma(ExceptionNamed(@"Custom Name"));
  70   RecordExceptionWithUma(ExceptionNamed(@""));
  71   RecordExceptionWithUma(nil);
  72
  73   // We should have exactly the right number of exceptions.
  74   StatisticsRecorder::GetSnapshot("OSX.NSException", &histograms);
  75   EXPECT_EQ(1U, histograms.size());
  76   EXPECT_EQ(HistogramBase::kUmaTargetedHistogramFlag, histograms[0]->flags());
  77
  78   scoped_ptr<HistogramSamples> samples(histograms[0]->SnapshotSamples());
  79   EXPECT_EQ(4, samples->GetCount(0));
  80   EXPECT_EQ(1, samples->GetCount(1));
  81   EXPECT_EQ(3, samples->GetCount(2));
  82   EXPECT_EQ(2, samples->GetCount(3));
  83
  84   // The unknown exceptions should end up in the overflow bucket.
  85   EXPECT_TRUE(histograms[0]->HasConstructionArguments(1,
  86                                                       kUnknownNSException,
  87                                                       kUnknownNSException + 1));
  88   EXPECT_EQ(4, samples->GetCount(kUnknownNSException));
  89 }
  90
  91 }  // chrome_browser_application_mac