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109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
#include <iostream>
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#include <vector>
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#include <pqxx/transaction>
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#include "test_helpers.hxx"
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// Test program for libpqxx. Compare const_reverse_iterator iteration of a
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// result to a regular, const_iterator iteration.
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namespace
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{
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void test_075()
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{
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pqxx::connection conn;
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pqxx::work tx{conn};
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pqxx::test::create_pqxxevents(tx);
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auto const R(tx.exec("SELECT year FROM pqxxevents"));
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PQXX_CHECK(not std::empty(R), "No events found, cannot test.");
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PQXX_CHECK_EQUAL(R[0], R.at(0), "Inconsistent result indexing.");
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PQXX_CHECK(not(R[0] != R.at(0)), "result::row::operator!=() is broken.");
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PQXX_CHECK_EQUAL(R[0][0], R[0].at(0), "Inconsistent row indexing.");
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PQXX_CHECK(
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not(R[0][0] != R[0].at(0)), "result::field::operator!=() is broken.");
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std::vector<std::string> contents;
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for (auto const &i : R) contents.push_back(i.at(0).as<std::string>());
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PQXX_CHECK_EQUAL(
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std::size(contents), std::vector<std::string>::size_type(std::size(R)),
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"Number of values does not match result size.");
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for (pqxx::result::size_type i{0}; i < std::size(R); ++i)
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PQXX_CHECK_EQUAL(
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contents[static_cast<std::size_t>(i)], R.at(i).at(0).c_str(),
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"Inconsistent iteration.");
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// Thorough test for result::const_reverse_iterator
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pqxx::result::const_reverse_iterator ri1(std::rbegin(R)), ri2(ri1),
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ri3(std::end(R));
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ri2 = std::rbegin(R);
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PQXX_CHECK(ri2 == ri1, "reverse_iterator copy constructor is broken.");
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PQXX_CHECK(ri3 == ri2, "result::end() does not generate rbegin().");
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PQXX_CHECK_EQUAL(
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ri2 - ri3, 0,
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"const_reverse_iterator is at nonzero distance from its own copy.");
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PQXX_CHECK(ri2 == ri3 + 0, "reverse_iterator+0 gives strange result.");
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PQXX_CHECK(ri2 == ri3 - 0, "reverse_iterator-0 gives strange result.");
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PQXX_CHECK(not(ri3 < ri2), "operator<() breaks on equal reverse_iterators.");
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PQXX_CHECK(ri2 <= ri3, "operator<=() breaks on equal reverse_iterators.");
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PQXX_CHECK(ri3++ == ri2, "reverse_iterator post-increment is broken.");
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PQXX_CHECK_EQUAL(ri3 - ri2, 1, "Wrong nonzero reverse_iterator distance.");
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PQXX_CHECK(ri3 > ri2, "reverse_iterator operator>() is broken.");
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PQXX_CHECK(ri3 >= ri2, "reverse_iterator operator>=() is broken.");
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PQXX_CHECK(ri2 < ri3, "reverse_iterator operator<() is broken.");
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PQXX_CHECK(ri2 <= ri3, "reverse_iterator operator<=() is broken.");
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PQXX_CHECK(ri3 == ri2 + 1, "Adding int to reverse_iterator is broken.");
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PQXX_CHECK(
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ri2 == ri3 - 1, "Subtracting int from reverse_iterator is broken.");
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PQXX_CHECK(ri3 == ++ri2, "reverse_iterator pre-increment is broken.");
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PQXX_CHECK(ri3 >= ri2, "operator>=() breaks on equal reverse_iterators.");
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PQXX_CHECK(ri3 >= ri2, "operator<=() breaks on equal reverse_iterators.");
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PQXX_CHECK(
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*ri3.base() == R.back(), "reverse_iterator does not arrive at back().");
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PQXX_CHECK(
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ri1->at(0) == (*ri1).at(0),
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"reverse_iterator operator->() is inconsistent with operator*().");
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PQXX_CHECK(ri2-- == ri3, "reverse_iterator post-decrement is broken.");
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PQXX_CHECK(ri2 == --ri3, "reverse_iterator pre-decrement is broken.");
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PQXX_CHECK(ri2 == std::rbegin(R), "reverse_iterator decrement is broken.");
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ri2 += 1;
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ri3 -= -1;
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PQXX_CHECK(
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ri2 != std::rbegin(R), "Adding to reverse_iterator does not work.");
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PQXX_CHECK(
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ri3 == ri2, "reverse_iterator operator-=() breaks on negative distances.");
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ri2 -= 1;
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PQXX_CHECK(
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ri2 == std::rbegin(R),
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"reverse_iterator operator+=() and operator-=() do not cancel out.");
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// Now verify that reverse iterator also sees the same results...
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auto l{std::rbegin(contents)};
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for (auto i{std::rbegin(R)}; i != std::rend(R); ++i, ++l)
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PQXX_CHECK_EQUAL(*l, i->at(0).c_str(), "Inconsistent reverse iteration.");
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PQXX_CHECK(l == std::rend(contents), "Reverse iteration ended too soon.");
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PQXX_CHECK(not std::empty(R), "No events found in table, cannot test.");
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}
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} // namespace
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PQXX_REGISTER_TEST(test_075);
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