First Commit

ext/libpqxx-7.7.3/test/test74.cxx

@@ -0,0 +1,72 @@
+#include <cmath>
+
+#include <pqxx/transaction>
+
+#include "test_helpers.hxx"
+
+using namespace pqxx;
+
+
+// Test program for libpqxx.  Test fieldstream.
+namespace
+{
+void test_074()
+{
+  connection conn;
+  work tx{conn};
+
+  result R{tx.exec("SELECT * FROM pg_tables")};
+  std::string const sval{R.at(0).at(1).c_str()};
+  std::string sval2;
+  fieldstream fs1(R.front()[1]);
+  fs1 >> sval2;
+  PQXX_CHECK_EQUAL(sval2, sval, "fieldstream returned wrong value.");
+
+  R = tx.exec("SELECT count(*) FROM pg_tables");
+  int ival;
+  fieldstream fs2(R.at(0).at(0));
+  fs2 >> ival;
+  PQXX_CHECK_EQUAL(
+    ival, R.front().front().as<int>(), "fieldstream::front() is broken.");
+
+  double dval;
+  (fieldstream(R.at(0).at(0))) >> dval;
+  PQXX_CHECK_BOUNDS(
+    dval, R[0][0].as<double>() - 0.1, R[0][0].as<double>() + 0.1,
+    "Got wrong double from fieldstream.");
+
+  auto const roughpi{static_cast<float>(3.1415926435)};
+  R = tx.exec("SELECT " + to_string(roughpi));
+  float pival;
+  (fieldstream(R.at(0).at(0))) >> pival;
+  PQXX_CHECK_BOUNDS(
+    pival, roughpi - 0.001, roughpi + 0.001,
+    "Pi approximation came back wrong from fieldstream.");
+
+  PQXX_CHECK_EQUAL(
+    to_string(R[0][0]), R[0][0].c_str(),
+    "to_string(result::field) is inconsistent with c_str().");
+
+  float float_pi;
+  from_string(to_string(roughpi), float_pi);
+  PQXX_CHECK_BOUNDS(
+    float_pi, roughpi - 0.00001, roughpi + 0.00001,
+    "Float changed in conversion.");
+
+  double double_pi;
+  pqxx::from_string(pqxx::to_string(static_cast<double>(roughpi)), double_pi);
+  PQXX_CHECK_BOUNDS(
+    double_pi, roughpi - 0.00001, roughpi + 0.00001,
+    "Double changed in conversion.");
+
+  long double const ld{roughpi};
+  long double long_double_pi;
+  from_string(to_string(ld), long_double_pi);
+  PQXX_CHECK_BOUNDS(
+    long_double_pi, roughpi - 0.00001, roughpi + 0.00001,
+    "long double changed in conversion.");
+}
+} // namespace
+
+
+PQXX_REGISTER_TEST(test_074);