net/disk_cache/blockfile/stats_unittest.cc

   1 // Copyright 2015 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 #include "net/disk_cache/blockfile/stats.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9
  10 TEST(DiskCacheStatsTest, Init) {
  11   disk_cache::Stats stats;
  12   EXPECT_TRUE(stats.Init(nullptr, 0, disk_cache::Addr()));
  13   EXPECT_EQ(0, stats.GetCounter(disk_cache::Stats::TRIM_ENTRY));
  14 }
  15
  16 TEST(DiskCacheStatsTest, InitWithEmptyBuffer) {
  17   disk_cache::Stats stats;
  18   int required_len = stats.StorageSize();
  19   scoped_ptr<char[]> storage(new char[required_len]);
  20   memset(storage.get(), 0, required_len);
  21
  22   ASSERT_TRUE(stats.Init(storage.get(), required_len, disk_cache::Addr()));
  23   EXPECT_EQ(0, stats.GetCounter(disk_cache::Stats::TRIM_ENTRY));
  24 }
  25
  26 TEST(DiskCacheStatsTest, FailsInit) {
  27   disk_cache::Stats stats;
  28   int required_len = stats.StorageSize();
  29   scoped_ptr<char[]> storage(new char[required_len]);
  30   memset(storage.get(), 0, required_len);
  31
  32   // Try a small buffer.
  33   EXPECT_LT(200, required_len);
  34   disk_cache::Addr addr;
  35   EXPECT_FALSE(stats.Init(storage.get(), 200, addr));
  36
  37   // Try a buffer with garbage.
  38   memset(storage.get(), 'a', required_len);
  39   EXPECT_FALSE(stats.Init(storage.get(), required_len, addr));
  40 }
  41
  42 TEST(DiskCacheStatsTest, SaveRestore) {
  43   scoped_ptr<disk_cache::Stats> stats(new disk_cache::Stats);
  44
  45   disk_cache::Addr addr(5);
  46   ASSERT_TRUE(stats->Init(nullptr, 0, addr));
  47   stats->SetCounter(disk_cache::Stats::CREATE_ERROR, 11);
  48   stats->SetCounter(disk_cache::Stats::DOOM_ENTRY, 13);
  49   stats->OnEvent(disk_cache::Stats::MIN_COUNTER);
  50   stats->OnEvent(disk_cache::Stats::TRIM_ENTRY);
  51   stats->OnEvent(disk_cache::Stats::DOOM_RECENT);
  52
  53   int required_len = stats->StorageSize();
  54   scoped_ptr<char[]> storage(new char[required_len]);
  55   disk_cache::Addr out_addr;
  56   int real_len = stats->SerializeStats(storage.get(), required_len, &out_addr);
  57   EXPECT_GE(required_len, real_len);
  58   EXPECT_EQ(out_addr, addr);
  59
  60   stats.reset(new disk_cache::Stats);
  61   ASSERT_TRUE(stats->Init(storage.get(), real_len, addr));
  62   EXPECT_EQ(1, stats->GetCounter(disk_cache::Stats::MIN_COUNTER));
  63   EXPECT_EQ(1, stats->GetCounter(disk_cache::Stats::TRIM_ENTRY));
  64   EXPECT_EQ(1, stats->GetCounter(disk_cache::Stats::DOOM_RECENT));
  65   EXPECT_EQ(0, stats->GetCounter(disk_cache::Stats::OPEN_HIT));
  66   EXPECT_EQ(0, stats->GetCounter(disk_cache::Stats::READ_DATA));
  67   EXPECT_EQ(0, stats->GetCounter(disk_cache::Stats::LAST_REPORT_TIMER));
  68   EXPECT_EQ(11, stats->GetCounter(disk_cache::Stats::CREATE_ERROR));
  69   EXPECT_EQ(13, stats->GetCounter(disk_cache::Stats::DOOM_ENTRY));
  70
  71   // Now pass the whole buffer. It shoulod not matter that there is unused
  72   // space at the end.
  73   stats.reset(new disk_cache::Stats);
  74   ASSERT_TRUE(stats->Init(storage.get(), required_len, addr));
  75   EXPECT_EQ(1, stats->GetCounter(disk_cache::Stats::MIN_COUNTER));
  76   EXPECT_EQ(1, stats->GetCounter(disk_cache::Stats::TRIM_ENTRY));
  77   EXPECT_EQ(1, stats->GetCounter(disk_cache::Stats::DOOM_RECENT));
  78   EXPECT_EQ(0, stats->GetCounter(disk_cache::Stats::OPEN_HIT));
  79   EXPECT_EQ(0, stats->GetCounter(disk_cache::Stats::READ_DATA));
  80   EXPECT_EQ(0, stats->GetCounter(disk_cache::Stats::LAST_REPORT_TIMER));
  81   EXPECT_EQ(11, stats->GetCounter(disk_cache::Stats::CREATE_ERROR));
  82   EXPECT_EQ(13, stats->GetCounter(disk_cache::Stats::DOOM_ENTRY));
  83 }