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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/dom_distiller/core/page_features.h"
#include <stddef.h>
#include <memory>
#include <string>
#include <vector>
#include "base/files/file_util.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/path_service.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
namespace dom_distiller {
// This test uses input data of core features and the output of the training
// pipeline's derived feature extraction to ensure that the extraction that is
// done in Chromium matches that in the training pipeline.
TEST(DomDistillerPageFeaturesTest, TestCalculateDerivedFeatures) {
base::FilePath dir_source_root;
EXPECT_TRUE(PathService::Get(base::DIR_SOURCE_ROOT, &dir_source_root));
std::string input_data;
ASSERT_TRUE(base::ReadFileToString(
dir_source_root.AppendASCII(
"components/test/data/dom_distiller/core_features.json"),
&input_data));
std::string expected_output_data;
// This file contains the output from the calculation of derived features in
// the training pipeline.
ASSERT_TRUE(base::ReadFileToString(
dir_source_root.AppendASCII(
"components/test/data/dom_distiller/derived_features.json"),
&expected_output_data));
std::unique_ptr<base::Value> input_json = base::JSONReader::Read(input_data);
ASSERT_TRUE(input_json);
std::unique_ptr<base::Value> expected_output_json =
base::JSONReader::Read(expected_output_data);
ASSERT_TRUE(expected_output_json);
base::ListValue* input_entries;
ASSERT_TRUE(input_json->GetAsList(&input_entries));
ASSERT_GT(input_entries->GetSize(), 0u);
base::ListValue* expected_output_entries;
ASSERT_TRUE(expected_output_json->GetAsList(&expected_output_entries));
ASSERT_EQ(expected_output_entries->GetSize(), input_entries->GetSize());
// In the output, the features list is a sequence of labels followed by values
// (so labels at even indices, values at odd indices).
base::DictionaryValue* entry;
base::ListValue* derived_features;
ASSERT_TRUE(expected_output_entries->GetDictionary(0, &entry));
ASSERT_TRUE(entry->GetList("features", &derived_features));
std::vector<std::string> labels;
for (size_t i = 0; i < derived_features->GetSize(); i += 2) {
std::string label;
ASSERT_TRUE(derived_features->GetString(i, &label));
labels.push_back(label);
}
for (size_t i = 0; i < input_entries->GetSize(); ++i) {
base::DictionaryValue* core_features;
ASSERT_TRUE(input_entries->GetDictionary(i, &entry));
ASSERT_TRUE(entry->GetDictionary("features", &core_features));
// CalculateDerivedFeaturesFromJSON expects a base::Value of the stringified
// JSON (and not a base::Value of the JSON itself)
std::string stringified_json;
ASSERT_TRUE(base::JSONWriter::Write(*core_features, &stringified_json));
std::unique_ptr<base::Value> stringified_value(
new base::Value(stringified_json));
std::vector<double> derived(
CalculateDerivedFeaturesFromJSON(stringified_value.get()));
ASSERT_EQ(labels.size(), derived.size());
ASSERT_TRUE(expected_output_entries->GetDictionary(i, &entry));
ASSERT_TRUE(entry->GetList("features", &derived_features));
std::string entry_url;
ASSERT_TRUE(entry->GetString("url", &entry_url));
for (size_t j = 0, value_index = 1; j < derived.size();
++j, value_index += 2) {
double expected_value;
if (!derived_features->GetDouble(value_index, &expected_value)) {
bool bool_value;
ASSERT_TRUE(derived_features->GetBoolean(value_index, &bool_value));
expected_value = bool_value ? 1.0 : 0.0;
}
EXPECT_DOUBLE_EQ(derived[j], expected_value)
<< "incorrect value for entry with url " << entry_url
<< " for derived feature " << labels[j];
}
}
}
std::vector<double> DeriveFromPath(const GURL& url) {
return CalculateDerivedFeatures(
false, // bool openGraph
url, // const GURL& url
0, // unsigned elementCount
0, // unsigned anchorCount
0, // unsigned formCount
0, // double mozScore
0, // double mozScoreAllSqrt
0 // double mozScoreAllLinear
);
}
TEST(DomDistillerPageFeaturesTest, TestPath) {
GURL url("http://example.com/search/view/index/the-title-of-archive.php");
std::vector<double> derived(DeriveFromPath(url));
EXPECT_EQ(0, lround(derived[1]));
EXPECT_EQ(1, lround(derived[2]));
EXPECT_EQ(1, lround(derived[3]));
EXPECT_EQ(1, lround(derived[4]));
EXPECT_EQ(1, lround(derived[5]));
EXPECT_EQ(0, lround(derived[6]));
EXPECT_EQ(0, lround(derived[7]));
EXPECT_EQ(1, lround(derived[8]));
EXPECT_EQ(43, lround(derived[9]));
EXPECT_EQ(0, lround(derived[10]));
EXPECT_EQ(4, lround(derived[11]));
EXPECT_EQ(4, lround(derived[12]));
EXPECT_EQ(0, lround(derived[13]));
EXPECT_EQ(24, lround(derived[14]));
}
TEST(DomDistillerPageFeaturesTest, TestPath2) {
GURL url("http://example.com/phpbb/forum123/456.asp");
std::vector<double> derived(DeriveFromPath(url));
EXPECT_EQ(1, lround(derived[1]));
EXPECT_EQ(0, lround(derived[2]));
EXPECT_EQ(0, lround(derived[3]));
EXPECT_EQ(0, lround(derived[4]));
EXPECT_EQ(0, lround(derived[5]));
EXPECT_EQ(1, lround(derived[6]));
EXPECT_EQ(1, lround(derived[7]));
EXPECT_EQ(0, lround(derived[8]));
EXPECT_EQ(23, lround(derived[9]));
EXPECT_EQ(0, lround(derived[10]));
EXPECT_EQ(3, lround(derived[11]));
EXPECT_EQ(1, lround(derived[12]));
EXPECT_EQ(2, lround(derived[13]));
EXPECT_EQ(7, lround(derived[14]));
}
TEST(DomDistillerPageFeaturesTest, TestPath3) {
GURL url("https://example.com/");
std::vector<double> derived(DeriveFromPath(url));
EXPECT_EQ(0, lround(derived[1]));
EXPECT_EQ(0, lround(derived[2]));
EXPECT_EQ(0, lround(derived[3]));
EXPECT_EQ(0, lround(derived[4]));
EXPECT_EQ(0, lround(derived[5]));
EXPECT_EQ(0, lround(derived[6]));
EXPECT_EQ(0, lround(derived[7]));
EXPECT_EQ(0, lround(derived[8]));
EXPECT_EQ(1, lround(derived[9]));
EXPECT_EQ(1, lround(derived[10]));
EXPECT_EQ(0, lround(derived[11]));
EXPECT_EQ(0, lround(derived[12]));
EXPECT_EQ(0, lround(derived[13]));
EXPECT_EQ(1, lround(derived[14]));
}
TEST(DomDistillerPageFeaturesTest, TestPath4) {
GURL url("https://example.com/trailing/");
std::vector<double> derived(DeriveFromPath(url));
EXPECT_EQ(0, lround(derived[1]));
EXPECT_EQ(0, lround(derived[2]));
EXPECT_EQ(0, lround(derived[3]));
EXPECT_EQ(0, lround(derived[4]));
EXPECT_EQ(0, lround(derived[5]));
EXPECT_EQ(0, lround(derived[6]));
EXPECT_EQ(0, lround(derived[7]));
EXPECT_EQ(0, lround(derived[8]));
EXPECT_EQ(10, lround(derived[9]));
EXPECT_EQ(0, lround(derived[10]));
EXPECT_EQ(1, lround(derived[11]));
EXPECT_EQ(0, lround(derived[12]));
EXPECT_EQ(0, lround(derived[13]));
EXPECT_EQ(9, lround(derived[14]));
}
}
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