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//
// Copyright (C) 2004-2024 Maciej Sobczak, Stephen Hutton, Vadim Zeitlin
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
//
#include "soci/soci.h"
#include <iomanip>
#include <iostream>
#include <catch.hpp>
#include "test-context.h"
// user-defined object for the "vector of custom type objects" tests.
class MyOptionalString
{
public:
MyOptionalString() : valid_(false) {}
MyOptionalString(const std::string& str) : valid_(true), str_(str) {}
void set(const std::string& str) { valid_ = true; str_ = str; }
void reset() { valid_ = false; str_.clear(); }
bool is_valid() const { return valid_; }
const std::string &get() const { return str_; }
private:
bool valid_;
std::string str_;
};
std::ostream& operator<<(std::ostream& ostr, const MyOptionalString& optstr)
{
ostr << (optstr.is_valid() ? "\"" + optstr.get() + "\"" : std::string("(null)"));
return ostr;
}
std::ostream& operator<<(std::ostream& ostr, const std::vector<MyOptionalString>& vec)
{
if ( vec.empty() )
{
ostr << "Empty vector";
}
else
{
ostr << "Vector of size " << vec.size() << " containing\n";
for ( size_t n = 0; n < vec.size(); ++n )
{
ostr << "\t [" << std::setw(3) << n << "] = " << vec[n] << "\n";
}
}
return ostr;
}
namespace soci
{
// basic type conversion for string based user-defined type which can be null
template<> struct type_conversion<MyOptionalString>
{
typedef std::string base_type;
static void from_base(const base_type& in, indicator ind, MyOptionalString& out)
{
if (ind == i_null)
{
out.reset();
}
else
{
out.set(in);
}
}
static void to_base(const MyOptionalString& in, base_type& out, indicator& ind)
{
if (in.is_valid())
{
out = in.get();
ind = i_ok;
}
else
{
ind = i_null;
}
}
};
namespace tests
{
// This variable is referenced from test-common.cpp to force linking this file.
volatile bool soci_use_test_custom = false;
// use vector elements with type convertion
TEST_CASE_METHOD(common_tests, "Use vector of custom type objects", "[core][use][vector][type_conversion]")
{
soci::session sql(backEndFactory_, connectString_);
auto_table_creator tableCreator(tc_.table_creator_1(sql));
// Unfortunately there is no portable way to indicate whether nulls should
// appear at the beginning or the end (SQL 2003 "NULLS LAST" is still not
// supported by MS SQL in 2021...), so use this column just to order by it.
std::vector<int> i;
i.push_back(0);
i.push_back(1);
i.push_back(2);
std::vector<MyOptionalString> v;
v.push_back(MyOptionalString("string")); // A not empty valid string.
v.push_back(MyOptionalString()); // Invalid string mapped to null.
v.push_back(MyOptionalString("")); // An empty but still valid string.
sql << "insert into soci_test(id, str) values(:i, :v)", use(i), use(v);
SECTION("standard type")
{
std::vector<std::string> values(3);
std::vector<indicator> inds(3);
sql << "select str from soci_test order by id", into(values, inds);
REQUIRE(values.size() == 3);
REQUIRE(inds.size() == 3);
CHECK(inds[0] == soci::i_ok);
CHECK(values[0] == "string");
CHECK(inds[1] == soci::i_null);
if ( !tc_.treats_empty_strings_as_null() )
{
CHECK(inds[2] == soci::i_ok);
CHECK(values[2] == "");
}
}
SECTION("user type")
{
std::vector<MyOptionalString> values(3);
std::vector<indicator> inds(3);
sql << "select str from soci_test order by id", into(values, inds);
REQUIRE(values.size() == 3);
REQUIRE(inds.size() == 3);
CHECK(inds[0] == soci::i_ok);
CHECK(values[0].is_valid());
CHECK(values[0].get() == "string");
CHECK(!values[1].is_valid());
CHECK(inds[1] == soci::i_null);
if ( !tc_.treats_empty_strings_as_null() )
{
CHECK(inds[2] == soci::i_ok);
CHECK(values[2].is_valid());
CHECK(values[2].get() == "");
}
}
}
TEST_CASE_METHOD(common_tests, "Into vector of custom type objects", "[core][into][vector][type_conversion]")
{
soci::session sql(backEndFactory_, connectString_);
auto_table_creator tableCreator(tc_.table_creator_1(sql));
// Column used for sorting only, see above.
std::vector<int> i;
i.push_back(0);
i.push_back(1);
i.push_back(2);
std::vector<std::string> values(3);
values[0] = "string";
std::vector<indicator> inds;
inds.push_back(i_ok);
inds.push_back(i_null);
inds.push_back(i_ok);
sql << "insert into soci_test(id, str) values(:i, :v)", use(i), use(values, inds);
std::vector<MyOptionalString> v2(4);
sql << "select str from soci_test order by id", into(v2);
INFO("Got back " << v2);
REQUIRE(v2.size() == 3);
CHECK(v2[0].is_valid());
CHECK(v2[0].get() == "string");
CHECK(!v2[1].is_valid());
if ( !tc_.treats_empty_strings_as_null() )
{
CHECK(v2[2].is_valid());
CHECK(v2[2].get().empty());
}
}
} // namespace tests
} // namespace soci
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