chrome/common/thumbnail_score_unittest.cc

   1 // Copyright (c) 2011 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 "chrome/common/thumbnail_score.h"
   6 #include "testing/gtest/include/gtest/gtest.h"
   7
   8 // Tests that the different types of thumbnails are compared properly.
   9 TEST(ThumbnailScoreTest, ShouldReplaceThumbnailWithType) {
  10   base::Time now = base::Time::Now();
  11
  12   ThumbnailScore nothing_good(0.5, false, false, now);
  13   ThumbnailScore not_at_top(0.5, false, true, now);
  14   ThumbnailScore bad_clipping(0.5, true, false, now);
  15   ThumbnailScore life_is_awesome(0.5, true, true, now);
  16
  17   EXPECT_TRUE(ShouldReplaceThumbnailWith(nothing_good, not_at_top));
  18   EXPECT_TRUE(ShouldReplaceThumbnailWith(nothing_good, bad_clipping));
  19   EXPECT_TRUE(ShouldReplaceThumbnailWith(nothing_good, life_is_awesome));
  20   EXPECT_TRUE(ShouldReplaceThumbnailWith(not_at_top, bad_clipping));
  21   EXPECT_TRUE(ShouldReplaceThumbnailWith(not_at_top, life_is_awesome));
  22   EXPECT_TRUE(ShouldReplaceThumbnailWith(bad_clipping, life_is_awesome));
  23 }
  24
  25 // Tests that we'll replace old thumbnails will crappier but newer ones.
  26 TEST(ThumbnailScoreTest, ShouldReplaceThumbnailWithTime) {
  27   // Use a really long time for the difference so we aren't sensitive to the
  28   // degrading schedule.
  29   base::Time now = base::Time::Now();
  30   base::Time last_year = now - base::TimeDelta::FromDays(365);
  31
  32   ThumbnailScore oldie_but_goodie(0.1, true, true, last_year);
  33   ThumbnailScore newie_but_crappie(0.9, true, true, now);
  34
  35   EXPECT_TRUE(ShouldReplaceThumbnailWith(oldie_but_goodie, newie_but_crappie));
  36 }
  37
  38 // Having many redirects should age the thumbnail.
  39 TEST(ThumbnailScoreTest, RedirectCount) {
  40   base::Time now = base::Time::Now();
  41
  42   ThumbnailScore no_redirects(0.5, true, true, now);
  43   no_redirects.redirect_hops_from_dest = 0;
  44   ThumbnailScore some_redirects(0.5, true, true, now);
  45   some_redirects.redirect_hops_from_dest = 1;
  46
  47   EXPECT_TRUE(ShouldReplaceThumbnailWith(some_redirects, no_redirects));
  48
  49   // This one has a lot of redirects but a better score. It should still be
  50   // rejected.
  51   ThumbnailScore lotsa_redirects(0.4, true, true, now);
  52   lotsa_redirects.redirect_hops_from_dest = 4;
  53   EXPECT_FALSE(ShouldReplaceThumbnailWith(no_redirects, lotsa_redirects));
  54 }
  55
  56 TEST(ThumbnailScoreTest, ShouldConsiderUpdating) {
  57   ThumbnailScore score;
  58   // By default, the score is low, thus we should generate a new thumbnail.
  59   EXPECT_TRUE(score.ShouldConsiderUpdating());
  60
  61   // Make it very interesting, but this is not enough.
  62   score.boring_score = 0.0;
  63   EXPECT_TRUE(score.ShouldConsiderUpdating());
  64
  65   // good_clipping is important, but sill not enough.
  66   score.good_clipping = true;
  67   EXPECT_TRUE(score.ShouldConsiderUpdating());
  68
  69   // at_top is important, but still not enough.
  70   score.at_top = true;
  71   EXPECT_TRUE(score.ShouldConsiderUpdating());
  72
  73   // load_completed is important. Finally, the thumbnail is new and
  74   // interesting enough.
  75   score.load_completed = true;
  76   EXPECT_FALSE(score.ShouldConsiderUpdating());
  77
  78   // Make it very boring, but it won't change the result. The boring score
  79   // isn't used for judging whether we should update or not. See comments
  80   // at boring_score in thumbnail_score.h for why.
  81   score.boring_score = 1.0;
  82   EXPECT_FALSE(score.ShouldConsiderUpdating());
  83
  84   // Make it old. Then, it's no longer new enough.
  85   score.time_at_snapshot -=
  86       base::TimeDelta::FromDays(ThumbnailScore::kUpdateThumbnailTimeDays);
  87   EXPECT_TRUE(score.ShouldConsiderUpdating());
  88 }