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content / browser / preloading / preloading_config_unittest.cc [blame]
// 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