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77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
#include <cstdio>
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#include <cstring>
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#include <iostream>
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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. Query a table and report its metadata.
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namespace
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{
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void test_011()
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{
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connection conn;
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work tx{conn};
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std::string const Table{"pg_tables"};
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result R(tx.exec("SELECT * FROM " + Table));
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// Print column names
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for (pqxx::row::size_type c{0}; c < R.columns(); ++c)
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{
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std::string N{R.column_name(c)};
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PQXX_CHECK_EQUAL(R.column_number(N), c, "Inconsistent column numbers.");
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}
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// If there are rows in R, compare their metadata to R's.
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if (not std::empty(R))
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{
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PQXX_CHECK_EQUAL(R[0].rownumber(), 0, "Row 0 has wrong number.");
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if (std::size(R) >= 2)
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PQXX_CHECK_EQUAL(R[1].rownumber(), 1, "Row 1 has wrong number.");
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// Test result::iterator::swap()
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pqxx::result::const_iterator const T1(R[0]), T2(R[1]);
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PQXX_CHECK_NOT_EQUAL(T1, T2, "Values are identical--can't test swap().");
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pqxx::result::const_iterator T1s(T1), T2s(T2);
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PQXX_CHECK_EQUAL(T1s, T1, "Result iterator copy-construction is wrong.");
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PQXX_CHECK_EQUAL(
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T2s, T2, "Result iterator copy-construction is inconsistently wrong.");
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T1s.swap(T2s);
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PQXX_CHECK_NOT_EQUAL(T1s, T1, "Result iterator swap doesn't work.");
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PQXX_CHECK_NOT_EQUAL(
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T2s, T2, "Result iterator swap inconsistently wrong.");
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PQXX_CHECK_EQUAL(T2s, T1, "Result iterator swap is asymmetric.");
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PQXX_CHECK_EQUAL(
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T1s, T2, "Result iterator swap is inconsistently asymmetric.");
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for (pqxx::row::size_type c{0}; c < std::size(R[0]); ++c)
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{
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std::string N{R.column_name(c)};
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PQXX_CHECK_EQUAL(
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std::string{R[0].at(c).c_str()}, R[0].at(N).c_str(),
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"Field by name != field by number.");
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PQXX_CHECK_EQUAL(
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std::string{R[0][c].c_str()}, R[0][N].c_str(),
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"at() is inconsistent with operator[].");
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PQXX_CHECK_EQUAL(R[0][c].name(), N, "Field names are inconsistent.");
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PQXX_CHECK_EQUAL(
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std::size(R[0][c]), strlen(R[0][c].c_str()),
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"Field size is not what we expected.");
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}
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}
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}
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PQXX_REGISTER_TEST(test_011);
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} // namespace
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