ZeroTierOne/ext/libpqxx-7.7.3/test/test61.cxx

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#include <iostream>
#include <pqxx/transaction>
#include "test_helpers.hxx"
using namespace pqxx;
// Example program for libpqxx. Test local variable functionality.
namespace
{
std::string GetDatestyle(transaction_base &T)
{
return T.conn().get_var("DATESTYLE");
}
std::string SetDatestyle(transaction_base &T, std::string style)
{
T.conn().set_session_var("DATESTYLE", style);
std::string const fullname{GetDatestyle(T)};
PQXX_CHECK(
not std::empty(fullname),
"Setting datestyle to " + style + " makes it an empty string.");
return fullname;
}
void RedoDatestyle(
transaction_base &T, std::string const &style, std::string const &expected)
{
PQXX_CHECK_EQUAL(SetDatestyle(T, style), expected, "Set wrong datestyle.");
}
void test_061()
{
connection conn;
work tx{conn};
PQXX_CHECK(not std::empty(GetDatestyle(tx)), "Initial datestyle not set.");
std::string const ISOname{SetDatestyle(tx, "ISO")};
std::string const SQLname{SetDatestyle(tx, "SQL")};
PQXX_CHECK_NOT_EQUAL(ISOname, SQLname, "Same datestyle in SQL and ISO.");
RedoDatestyle(tx, "SQL", SQLname);
// Prove that setting an unknown variable causes an error, as expected
quiet_errorhandler d(tx.conn());
PQXX_CHECK_THROWS(
conn.set_session_var("NONEXISTENT_VARIABLE_I_HOPE", 1), sql_error,
"Setting unknown variable failed to fail.");
}
PQXX_REGISTER_TEST(test_061);
} // namespace