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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
#include <cmath>
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#include <pqxx/transaction>
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#include "test_helpers.hxx"
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using namespace pqxx;
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// Test program for libpqxx. Test fieldstream.
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namespace
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{
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void test_074()
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{
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connection conn;
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work tx{conn};
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result R{tx.exec("SELECT * FROM pg_tables")};
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std::string const sval{R.at(0).at(1).c_str()};
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std::string sval2;
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fieldstream fs1(R.front()[1]);
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fs1 >> sval2;
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PQXX_CHECK_EQUAL(sval2, sval, "fieldstream returned wrong value.");
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R = tx.exec("SELECT count(*) FROM pg_tables");
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int ival;
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fieldstream fs2(R.at(0).at(0));
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fs2 >> ival;
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PQXX_CHECK_EQUAL(
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ival, R.front().front().as<int>(), "fieldstream::front() is broken.");
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double dval;
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(fieldstream(R.at(0).at(0))) >> dval;
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PQXX_CHECK_BOUNDS(
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dval, R[0][0].as<double>() - 0.1, R[0][0].as<double>() + 0.1,
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"Got wrong double from fieldstream.");
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auto const roughpi{static_cast<float>(3.1415926435)};
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R = tx.exec("SELECT " + to_string(roughpi));
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float pival;
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(fieldstream(R.at(0).at(0))) >> pival;
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PQXX_CHECK_BOUNDS(
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pival, roughpi - 0.001, roughpi + 0.001,
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"Pi approximation came back wrong from fieldstream.");
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PQXX_CHECK_EQUAL(
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to_string(R[0][0]), R[0][0].c_str(),
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"to_string(result::field) is inconsistent with c_str().");
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float float_pi;
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from_string(to_string(roughpi), float_pi);
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PQXX_CHECK_BOUNDS(
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float_pi, roughpi - 0.00001, roughpi + 0.00001,
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"Float changed in conversion.");
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double double_pi;
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pqxx::from_string(pqxx::to_string(static_cast<double>(roughpi)), double_pi);
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PQXX_CHECK_BOUNDS(
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double_pi, roughpi - 0.00001, roughpi + 0.00001,
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"Double changed in conversion.");
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long double const ld{roughpi};
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long double long_double_pi;
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from_string(to_string(ld), long_double_pi);
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PQXX_CHECK_BOUNDS(
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long_double_pi, roughpi - 0.00001, roughpi + 0.00001,
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"long double changed in conversion.");
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}
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} // namespace
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PQXX_REGISTER_TEST(test_074);
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