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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/local_search_service/search_utils.h"
#include <algorithm>
#include "base/strings/utf_string_conversions.h"
#include "chromeos/ash/components/local_search_service/test_utils.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace ash::local_search_service {
TEST(SearchUtilsTest, PrefixMatch) {
// Query is a prefix of text, score is the ratio.
EXPECT_NEAR(ExactPrefixMatchScore(u"musi", u"music"), 0.8, 0.001);
// Text is a prefix of query, score is 0.
EXPECT_EQ(ExactPrefixMatchScore(u"music", u"musi"), 0);
// Case matters.
EXPECT_EQ(ExactPrefixMatchScore(u"musi", u"Music"), 0);
// Query isn't a prefix.
EXPECT_EQ(ExactPrefixMatchScore(u"wide", u"wifi"), 0);
// Text is empty.
EXPECT_EQ(ExactPrefixMatchScore(u"music", u""), 0);
// Query is empty.
EXPECT_EQ(ExactPrefixMatchScore(u"", u"abc"), 0);
}
TEST(SearchUtilsTest, BlockMatch) {
EXPECT_NEAR(BlockMatchScore(u"wifi", u"wi-fi"), 0.804, 0.001);
// Case matters.
EXPECT_NEAR(BlockMatchScore(u"wifi", u"Wi-Fi"), 0.402, 0.001);
}
TEST(SearchUtilsTest, RelevanceCoefficient) {
// Relevant because prefix requirement is met.
EXPECT_GT(RelevanceCoefficient(u"wifi", u"wi-fi", 0 /* prefix_threshold */,
0.99 /* block_threshold */),
0);
// Relevant because prefix requirement is met.
EXPECT_GT(RelevanceCoefficient(u"musi", u"music", 0.8 /* prefix_threshold */,
0.999 /* block_threshold */),
0);
// Relevant because block match requirement is met.
EXPECT_GT(RelevanceCoefficient(u"wifi", u"wi-fi", 0.2 /* prefix_threshold */,
0.001 /* block_threshold */),
0);
// Neither prefix nor block match requirement is met.
EXPECT_EQ(RelevanceCoefficient(u"wifi", u"wi-fi", 0.2 /* prefix_threshold */,
0.99 /* block_threshold */),
0);
// Return the higher score if both requirements are met.
EXPECT_NEAR(RelevanceCoefficient(u"wifi", u"wi-fi", 0 /* prefix_threshold */,
0 /* block_threshold */),
std::max(BlockMatchScore(u"wifi", u"wi-fi"),
ExactPrefixMatchScore(u"wifi", u"wi-fi")),
0.001);
EXPECT_NEAR(RelevanceCoefficient(u"musi", u"music", 0 /* prefix_threshold */,
0 /* block_threshold */),
std::max(BlockMatchScore(u"musi", u"music"),
ExactPrefixMatchScore(u"musi", u"music")),
0.001);
}
} // namespace ash::local_search_service
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