1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/preloading/preloading_config.h"
#include "base/test/scoped_feature_list.h"
#include "content/common/features.h"
#include "content/public/browser/preloading.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
namespace {
class PreloadingConfigTest : public ::testing::Test {};
TEST_F(PreloadingConfigTest, EmptyConfig) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(features::kPreloadingConfig,
{{"preloading_config", ""}});
PreloadingConfig& config = PreloadingConfig::GetInstance();
config.ParseConfig();
// Unspecified configs should not be held back.
EXPECT_FALSE(
config.ShouldHoldback(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor));
// Unspecified configs should log 100% of PreloadingAttempts.
EXPECT_EQ(
config.SamplingLikelihood(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor),
1.0);
}
TEST_F(PreloadingConfigTest, NonJsonConfig) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(features::kPreloadingConfig,
{{"preloading_config", "bad"}});
PreloadingConfig& config = PreloadingConfig::GetInstance();
config.ParseConfig();
// Unspecified configs should not be held back.
EXPECT_FALSE(
config.ShouldHoldback(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor));
// Unspecified configs should log 100% of PreloadingAttempts.
EXPECT_EQ(
config.SamplingLikelihood(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor),
1.0);
}
TEST_F(PreloadingConfigTest, InvalidPreloadingType) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(features::kPreloadingConfig,
{{"preloading_config", R"(
[{
"preloading_type": "Foo",
"preloading_predictor": "UrlPointerDownOnAnchor",
"holdback": true
}]
)"}});
PreloadingConfig& config = PreloadingConfig::GetInstance();
config.ParseConfig();
// Unspecified configs should not be held back.
EXPECT_FALSE(
config.ShouldHoldback(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor));
}
TEST_F(PreloadingConfigTest, InvalidPredictor) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(features::kPreloadingConfig,
{{"preloading_config", R"(
[{
"preloading_type": "Preconnect",
"preloading_predictor": "Foo",
"holdback": true
}]
)"}});
PreloadingConfig& config = PreloadingConfig::GetInstance();
config.ParseConfig();
// Unspecified configs should not be held back.
EXPECT_FALSE(
config.ShouldHoldback(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor));
}
TEST_F(PreloadingConfigTest, ValidConfig) {
base::test::ScopedFeatureList features;
features.InitAndEnableFeatureWithParameters(features::kPreloadingConfig,
{{"preloading_config", R"(
[{
"preloading_type": "Preconnect",
"preloading_predictor": "UrlPointerDownOnAnchor",
"holdback": true,
"sampling_likelihood": 0.5
},{
"preloading_type": "Prerender",
"preloading_predictor": "UrlPointerHoverOnAnchor",
"holdback": true,
"sampling_likelihood": 0.25
}]
)"}});
PreloadingConfig& config = PreloadingConfig::GetInstance();
config.ParseConfig();
EXPECT_TRUE(
config.ShouldHoldback(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor));
EXPECT_EQ(
config.SamplingLikelihood(PreloadingType::kPreconnect,
preloading_predictor::kUrlPointerDownOnAnchor),
0.5);
EXPECT_TRUE(
config.ShouldHoldback(PreloadingType::kPrerender,
preloading_predictor::kUrlPointerHoverOnAnchor));
EXPECT_EQ(
config.SamplingLikelihood(PreloadingType::kPrerender,
preloading_predictor::kUrlPointerHoverOnAnchor),
0.25);
// This isn't in the config, so make sure we get the default settings.
EXPECT_FALSE(
config.ShouldHoldback(PreloadingType::kPrerender,
preloading_predictor::kUrlPointerDownOnAnchor));
EXPECT_EQ(
config.SamplingLikelihood(PreloadingType::kPrerender,
preloading_predictor::kUrlPointerDownOnAnchor),
1.0);
}
} // namespace
} // namespace content
|
