mirror of https://github.com/catchorg/Catch2.git
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
#define CATCH_CONFIG_ENABLE_VARIANT_STRINGMAKER
|
|
#include "catch.hpp"
|
|
|
|
#if defined(CATCH_CONFIG_CPP17_VARIANT)
|
|
|
|
#include <string>
|
|
#include <variant>
|
|
|
|
TEST_CASE( "variant<std::monostate>", "[toString][variant][approvals]")
|
|
{
|
|
using type = std::variant<std::monostate>;
|
|
CHECK( "{ }" == ::Catch::Detail::stringify(type{}) );
|
|
type value {};
|
|
CHECK( "{ }" == ::Catch::Detail::stringify(value) );
|
|
CHECK( "{ }" == ::Catch::Detail::stringify(std::get<0>(value)) );
|
|
}
|
|
|
|
TEST_CASE( "variant<int>", "[toString][variant][approvals]")
|
|
{
|
|
using type = std::variant<int>;
|
|
CHECK( "0" == ::Catch::Detail::stringify(type{0}) );
|
|
}
|
|
|
|
TEST_CASE( "variant<float, int>", "[toString][variant][approvals]")
|
|
{
|
|
using type = std::variant<float, int>;
|
|
CHECK( "0.5f" == ::Catch::Detail::stringify(type{0.5f}) );
|
|
CHECK( "0" == ::Catch::Detail::stringify(type{0}) );
|
|
|
|
SECTION("valueless by exception") {
|
|
struct sample {
|
|
operator int() const { throw 42; }
|
|
};
|
|
|
|
type value{1.5f};
|
|
REQUIRE_THROWS_AS( value.emplace<int>(sample{}), int );
|
|
REQUIRE( value.valueless_by_exception() );
|
|
CHECK( "{valueless variant}" == ::Catch::Detail::stringify(value) );
|
|
}
|
|
}
|
|
|
|
TEST_CASE( "variant<string, int>", "[toString][variant][approvals]")
|
|
{
|
|
using type = std::variant<std::string, int>;
|
|
CHECK( "\"foo\"" == ::Catch::Detail::stringify(type{"foo"}) );
|
|
CHECK( "0" == ::Catch::Detail::stringify(type{0}) );
|
|
}
|
|
|
|
TEST_CASE( "variant<variant<float, int>, string>", "[toString][variant][approvals]")
|
|
{
|
|
using inner = std::variant<float, int>;
|
|
using type = std::variant<inner, std::string>;
|
|
CHECK( "0.5f" == ::Catch::Detail::stringify(type{0.5f}) );
|
|
CHECK( "0" == ::Catch::Detail::stringify(type{0}) );
|
|
CHECK( "\"foo\"" == ::Catch::Detail::stringify(type{"foo"}) );
|
|
|
|
struct sample {
|
|
operator int() const { throw 42; }
|
|
};
|
|
|
|
SECTION("valueless nested variant") {
|
|
type value = inner{0.5f};
|
|
REQUIRE( std::holds_alternative<inner>(value) );
|
|
REQUIRE( std::holds_alternative<float>(std::get<inner>(value)) );
|
|
|
|
REQUIRE_THROWS_AS( std::get<0>(value).emplace<int>(sample{}), int );
|
|
|
|
// outer variant is still valid and contains inner
|
|
REQUIRE( std::holds_alternative<inner>(value) );
|
|
// inner variant is valueless
|
|
REQUIRE( std::get<inner>(value).valueless_by_exception() );
|
|
CHECK( "{valueless variant}" == ::Catch::Detail::stringify(value) );
|
|
}
|
|
}
|
|
|
|
TEST_CASE( "variant<nullptr,int,const char *>", "[toString][variant][approvals]" )
|
|
{
|
|
using type = std::variant<std::nullptr_t,int,const char *>;
|
|
CHECK( "nullptr" == ::Catch::Detail::stringify(type{nullptr}) );
|
|
CHECK( "42" == ::Catch::Detail::stringify(type{42}) );
|
|
CHECK( "\"Catch me\"" == ::Catch::Detail::stringify(type{"Catch me"}) );
|
|
}
|
|
|
|
#endif // CATCH_INTERNAL_CONFIG_CPP17_VARIANT
|