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/// \file
/// \author Diffblue Ltd.
/// Unit tests for checking if two strings are within a certain edit distance
#include <testing-utils/use_catch.h>
#include <util/edit_distance.h>
TEST_CASE("edit distance 0", "[core][util][edit_distance]")
{
auto const hello = levenshtein_automatont{"hello", 0};
// Distance 0
REQUIRE(hello.matches("hello"));
REQUIRE(hello.get_edit_distance("hello").value() == 0);
// Distance 1
REQUIRE_FALSE(hello.matches("hallo"));
REQUIRE_FALSE(hello.matches("hell"));
REQUIRE_FALSE(hello.matches("helloo"));
REQUIRE_FALSE(hello.matches("chello"));
// Distance 2
REQUIRE_FALSE(hello.matches("helol"));
REQUIRE_FALSE(hello.matches("help"));
REQUIRE_FALSE(hello.matches("yohello"));
// Distance 3
REQUIRE_FALSE(hello.matches("kelp"));
REQUIRE_FALSE(hello.matches("hilt"));
REQUIRE_FALSE(hello.matches("wallow"));
// Distance > 3
REQUIRE_FALSE(hello.matches("unrelated"));
}
TEST_CASE("edit distance 1", "[core][util][edit_distance]")
{
auto const hello = levenshtein_automatont{"hello", 1};
// Distance 0
REQUIRE(hello.matches("hello"));
REQUIRE(hello.get_edit_distance("hello").value() == 0);
// Distance 1
REQUIRE(hello.matches("hallo"));
REQUIRE(hello.get_edit_distance("hallo").value() == 1);
REQUIRE(hello.matches("hell"));
REQUIRE(hello.get_edit_distance("hell").value() == 1);
REQUIRE(hello.matches("helloo"));
REQUIRE(hello.get_edit_distance("helloo").value() == 1);
REQUIRE(hello.matches("chello"));
REQUIRE(hello.get_edit_distance("chello").value() == 1);
// Distance 2
REQUIRE_FALSE(hello.matches("helol"));
REQUIRE_FALSE(hello.matches("help"));
REQUIRE_FALSE(hello.matches("yohello"));
// Distance 3
REQUIRE_FALSE(hello.matches("kelp"));
REQUIRE_FALSE(hello.matches("hilt"));
REQUIRE_FALSE(hello.matches("wallow"));
// Distance > 3
REQUIRE_FALSE(hello.matches("unrelated"));
}
TEST_CASE("edit distance 2", "[core][util][edit_distance]")
{
auto const hello = levenshtein_automatont{"hello", 2};
// Distance 0
REQUIRE(hello.matches("hello"));
REQUIRE(hello.get_edit_distance("hello").value() == 0);
// Distance 1
REQUIRE(hello.matches("hallo"));
REQUIRE(hello.get_edit_distance("hallo").value() == 1);
REQUIRE(hello.matches("hell"));
REQUIRE(hello.get_edit_distance("hell").value() == 1);
REQUIRE(hello.matches("helloo"));
REQUIRE(hello.get_edit_distance("helloo").value() == 1);
REQUIRE(hello.matches("chello"));
REQUIRE(hello.get_edit_distance("chello").value() == 1);
// Distance 2
REQUIRE(hello.matches("helol"));
REQUIRE(hello.get_edit_distance("helol").value() == 2);
REQUIRE(hello.matches("help"));
REQUIRE(hello.get_edit_distance("help").value() == 2);
REQUIRE(hello.matches("yohello"));
REQUIRE(hello.get_edit_distance("yohello").value() == 2);
// Distance 3
REQUIRE_FALSE(hello.matches("kelp"));
REQUIRE_FALSE(hello.matches("hilt"));
REQUIRE_FALSE(hello.matches("wallow"));
// Distance > 3
REQUIRE_FALSE(hello.matches("unrelated"));
}
TEST_CASE("edit distance 3", "[core][util][edit_distance]")
{
auto const hello = levenshtein_automatont{"hello", 3};
// Distance 0
REQUIRE(hello.matches("hello"));
REQUIRE(hello.get_edit_distance("hello").value() == 0);
// Distance 1
REQUIRE(hello.matches("hallo"));
REQUIRE(hello.get_edit_distance("hallo").value() == 1);
REQUIRE(hello.matches("hell"));
REQUIRE(hello.get_edit_distance("hell").value() == 1);
REQUIRE(hello.matches("helloo"));
REQUIRE(hello.get_edit_distance("helloo").value() == 1);
REQUIRE(hello.matches("chello"));
REQUIRE(hello.get_edit_distance("chello").value() == 1);
// Distance 2
REQUIRE(hello.matches("helol"));
REQUIRE(hello.get_edit_distance("helol").value() == 2);
REQUIRE(hello.matches("help"));
REQUIRE(hello.get_edit_distance("help").value() == 2);
REQUIRE(hello.matches("yohello"));
REQUIRE(hello.get_edit_distance("yohello").value() == 2);
// Distance 3
REQUIRE(hello.matches("kelp"));
REQUIRE(hello.get_edit_distance("kelp").value() == 3);
REQUIRE(hello.matches("hilt"));
REQUIRE(hello.get_edit_distance("hilt").value() == 3);
REQUIRE(hello.matches("wallow"));
REQUIRE(hello.get_edit_distance("wallow").value() == 3);
// Distance > 3
REQUIRE_FALSE(hello.matches("unrelated"));
}
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