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postgres2.cpp
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postgres2.cpp
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// #include "test_helpers.hxx"
// #include "test_types.hxx"
#include<pqxx/stream_to>
#include <pqxx/pqxx>
#include <cstring>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#if defined PQXX_HAVE_OPTIONAL
#include <optional>
#elif defined PQXX_HAVE_EXP_OPTIONAL && !defined(PQXX_HIDE_EXP_OPTIONAL)
#include <experimental/optional>
#endif
using namespace std;
namespace
{
void test_nonoptionals(pqxx::connection_base& connection)
{
pqxx::work transaction{connection};
pqxx::stream_from extractor{transaction, "stream_from_test"};
PQXX_CHECK(extractor, "stream_from failed to initialize");
std::tuple<
int,
std::string,
int,
ipv4,
std::string,
bytea
> got_tuple;
extractor >> got_tuple;
PQXX_CHECK(extractor, "stream_from failed to read first row");
PQXX_CHECK_EQUAL(std::get<0>(got_tuple), 1234, "field value mismatch");
// PQXX_CHECK_EQUAL(*std::get<1>(got_tuple), , "field value mismatch");
PQXX_CHECK_EQUAL(std::get<2>(got_tuple), 4321, "field value mismatch");
PQXX_CHECK_EQUAL(
std::get<3>(got_tuple),
(ipv4{8, 8, 8, 8}),
"field value mismatch");
PQXX_CHECK_EQUAL(
std::get<4>(got_tuple),
"hello world",
"field value mismatch");
PQXX_CHECK_EQUAL(
std::get<5>(got_tuple),
(bytea{'\x00', '\x01', '\x02'}),
"field value mismatch");
try
{
extractor >> got_tuple;
PQXX_CHECK_NOTREACHED("stream_from improperly read second row");
}
catch (const pqxx::conversion_error &e)
{
std::string what{e.what()};
if (what != "Attempt to convert null to int.") throw;
pqxx::test::expected_exception("Could not extract row: " + what);
}
std::tuple<
int,
std::string,
std::nullptr_t,
std::nullptr_t,
std::string,
bytea
> got_tuple_nulls1;
std::tuple<
int,
std::nullptr_t,
std::nullptr_t,
std::nullptr_t,
std::string,
bytea
> got_tuple_nulls2;
try
{
extractor >> got_tuple_nulls2;
PQXX_CHECK_NOTREACHED("stream_from improperly read second row");
}
catch (const pqxx::conversion_error &e)
{
if (std::string{e.what(), 27} != "Attempt to convert non-null") throw;
pqxx::test::expected_exception(
std::string{"Could not extract row: "} + e.what()
);
}
extractor >> got_tuple_nulls1;
PQXX_CHECK(extractor, "stream_from failed to reentrantly read second row");
extractor >> got_tuple_nulls2;
PQXX_CHECK(extractor, "stream_from failed to reentrantly read third row");
extractor >> got_tuple;
PQXX_CHECK(not extractor, "stream_from failed to detect end of stream");
extractor.complete();
}
void test_bad_tuples(pqxx::connection_base &conn)
{
pqxx::work tx{conn};
pqxx::stream_from extractor{tx, "stream_from_test"};
PQXX_CHECK(extractor, "stream_from failed to initialize");
std::tuple<int> got_tuple_too_short;
try
{
extractor >> got_tuple_too_short;
PQXX_CHECK_NOTREACHED("stream_from improperly read first row");
}
catch (const pqxx::usage_error &e)
{
std::string what{e.what()};
if (what != "Not all fields extracted from stream_from line") throw;
pqxx::test::expected_exception("Could not extract row: " + what);
}
std::tuple<
int,
std::string,
int,
ipv4,
std::string,
bytea,
std::string
> got_tuple_too_long;
try
{
extractor >> got_tuple_too_long;
PQXX_CHECK_NOTREACHED("stream_from improperly read first row");
}
catch (const pqxx::usage_error &e)
{
std::string what{e.what()};
if (what != "Too few fields to extract from stream_from line.") throw;
pqxx::test::expected_exception("Could not extract row: " + what);
}
extractor.complete();
}
#define ASSERT_FIELD_EQUAL(OPT, VAL) \
PQXX_CHECK(static_cast<bool>(OPT), "unexpected null field"); \
PQXX_CHECK_EQUAL(*OPT, VAL, "field value mismatch")
#define ASSERT_FIELD_NULL(OPT) \
PQXX_CHECK(not static_cast<bool>(OPT), "expected null field")
template<template<typename...> class O>
void test_optional(pqxx::connection_base& connection)
{
pqxx::work transaction{connection};
pqxx::stream_from extractor{transaction, "stream_from_test"};
PQXX_CHECK(extractor, "stream_from failed to initialize");
std::tuple<
int,
O<std::string>,
O<int >,
O<ipv4 >,
O<std::string>,
O<bytea >
> got_tuple;
extractor >> got_tuple;
PQXX_CHECK(extractor, "stream_from failed to read first row");
PQXX_CHECK_EQUAL(std::get<0>(got_tuple), 1234, "field value mismatch");
PQXX_CHECK(static_cast<bool>(std::get<1>(got_tuple)), "unexpected null field");
// PQXX_CHECK_EQUAL(*std::get<1>(got_tuple), , "field value mismatch");
ASSERT_FIELD_EQUAL(std::get<2>(got_tuple), 4321);
ASSERT_FIELD_EQUAL(std::get<3>(got_tuple), (ipv4{8, 8, 8, 8}));
ASSERT_FIELD_EQUAL(std::get<4>(got_tuple), "hello world");
ASSERT_FIELD_EQUAL(std::get<5>(got_tuple), (bytea{'\x00', '\x01', '\x02'}));
extractor >> got_tuple;
PQXX_CHECK(extractor, "stream_from failed to read second row");
PQXX_CHECK_EQUAL(std::get<0>(got_tuple), 5678, "field value mismatch");
ASSERT_FIELD_EQUAL(std::get<1>(got_tuple), "2018-11-17 21:23:00");
ASSERT_FIELD_NULL(std::get<2>(got_tuple));
ASSERT_FIELD_NULL(std::get<3>(got_tuple));
ASSERT_FIELD_EQUAL(std::get<4>(got_tuple), "こんにちは");
ASSERT_FIELD_EQUAL(std::get<5>(got_tuple), (bytea{'f', 'o', 'o', ' ', 'b', 'a', 'r', '\0'}));
extractor >> got_tuple;
PQXX_CHECK(extractor, "stream_from failed to read third row");
PQXX_CHECK_EQUAL(std::get<0>(got_tuple), 910, "field value mismatch");
ASSERT_FIELD_NULL(std::get<1>(got_tuple));
ASSERT_FIELD_NULL(std::get<2>(got_tuple));
ASSERT_FIELD_NULL(std::get<3>(got_tuple));
ASSERT_FIELD_EQUAL(std::get<4>(got_tuple), "\\N");
ASSERT_FIELD_EQUAL(std::get<5>(got_tuple), bytea{});
extractor >> got_tuple;
PQXX_CHECK(not extractor, "stream_from failed to detect end of stream");
extractor.complete();
}
void test_stream_from()
{
pqxx::connection conn;
pqxx::work tx{conn};
tx.exec(
"CREATE TEMP TABLE stream_from_test ("
"number0 INT NOT NULL,"
"ts1 TIMESTAMP NULL,"
"number2 INT NULL,"
"addr3 INET NULL,"
"txt4 TEXT NULL,"
"bin5 BYTEA NOT NULL"
")"
);
tx.exec_params(
"INSERT INTO stream_from_test VALUES (1,2,3,4,5,6)",
1234,
"now",
4321,
ipv4{8, 8, 8, 8},
"hello world",
bytea{'\x00', '\x01', '\x02'}
);
tx.exec_params(
"INSERT INTO stream_from_test VALUES (1,2,3,4,5,6)",
5678,
"2018-11-17 21:23:00",
nullptr,
nullptr,
"こんにちは",
bytea{'f', 'o', 'o', ' ', 'b', 'a', 'r', '\0'}
);
tx.exec_params(
"INSERT INTO stream_from_test VALUES (1,2,3,4,5,6)",
910,
nullptr,
nullptr,
nullptr,
"\\N",
bytea{}
);
tx.commit();
test_nonoptionals(conn);
test_bad_tuples(conn);
std::cout << "testing `std::unique_ptr` as optional...\n";
test_optional<std::unique_ptr>(conn);
std::cout << "testing `custom_optional` as optional...\n";
test_optional<custom_optional>(conn);
#if defined PQXX_HAVE_OPTIONAL
std::cout << "testing `std::optional` as optional...\n";
test_optional<std::optional>(conn);
#elif defined PQXX_HAVE_EXP_OPTIONAL && !defined(PQXX_HIDE_EXP_OPTIONAL)
std::cout << "testing `std::experimental::optional` as optional...\n";
test_optional<std::experimental::optional>(conn);
#endif
}
PQXX_REGISTER_TEST(test_stream_from);
} // namespace
int main(){
pqxx::connection connection("dbname = postgres user = hoss password = 789456123 hostaddr = 127.0.0.1 port = 5432");
test_nonoptionals(connection);
}