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t/40numrows.t  view on Meta::CPAN

sub ServerError() {
    print STDERR ("Cannot connect: ", $DBI::errstr, "\n",
    "\tEither your server is not up and running or you have no\n",
    "\tpermissions for acessing the DSN $test_dsn.\n",
    "\tThis test requires a running server and write permissions.\n",
    "\tPlease make sure your server is running and you have\n",
    "\tpermissions, then retry.\n");
    exit 10;
}


sub TrueRows($) {
    my ($sth) = @_;
    my $count = 0;
    while ($sth->fetchrow_arrayref) {
    ++$count;
    }
    $count;
}


#
#   Main loop; leave this untouched, put tests after creating
#   the new table.
#
while (Testing()) {
    #
    #   Connect to the database
    Test($state or ($dbh = DBI->connect($test_dsn, $test_user,
                    $test_password)))
    or ServerError();

    #
    #   Find a possible new table name
    #
    Test($state or ($table = FindNewTable($dbh)))
       or DbiError($dbh->err, $dbh->errstr);

    #
    #   Create a new table; EDIT THIS!
    #
    Test($state or ($def = TableDefinition($table,
                       ["id",   "INTEGER",  4, 0],
                       ["name", "CHAR",    64, 0]),
            $dbh->do($def)))
       or DbiError($dbh->err, $dbh->errstr);


    #
    #   This section should exercise the sth->rows
    #   method by preparing a statement, then finding the
    #   number of rows within it.
    #   Prior to execution, this should fail. After execution, the
    #   number of rows affected by the statement will be returned.
    #
    Test($state or $dbh->do("INSERT INTO $table"
                . " VALUES( 1, 'Alligator Descartes' )"))
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or ($cursor = $dbh->prepare("SELECT * FROM $table"
                       . " WHERE id = 1")))
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or $cursor->execute)
           or DbiError($dbh->err, $dbh->errstr);

    Test($state or ($numrows = $cursor->rows) == 1  or  ($numrows == -1))
    or ErrMsgF("Expected 1 rows, got %s.\n", $numrows);

    Test($state or ($numrows = TrueRows($cursor)) == 1)
    or ErrMsgF("Expected to fetch 1 rows, got %s.\n", $numrows);

    Test($state or $cursor->finish)
           or DbiError($dbh->err, $dbh->errstr);

    Test($state or undef $cursor or 1);

    Test($state or $dbh->do("INSERT INTO $table"
                . " VALUES( 2, 'Jochen Wiedmann' )"))
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or ($cursor = $dbh->prepare("SELECT * FROM $table"
                        . " WHERE id >= 1")))
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or $cursor->execute)
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or ($numrows = $cursor->rows) == 2  or  ($numrows == -1))
    or ErrMsgF("Expected 2 rows, got %s.\n", $numrows);

    Test($state or ($numrows = TrueRows($cursor)) == 2)
    or ErrMsgF("Expected to fetch 2 rows, got %s.\n", $numrows);

    Test($state or $cursor->finish)
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or undef $cursor or 1);

    Test($state or $dbh->do("INSERT INTO $table"
                . " VALUES(3, 'Tim Bunce')"))
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or ($cursor = $dbh->prepare("SELECT * FROM $table"
                        . " WHERE id >= 2")))
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or $cursor->execute)
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or ($numrows = $cursor->rows) == 2  or  ($numrows == -1))
    or ErrMsgF("Expected 2 rows, got %s.\n", $numrows);

    Test($state or ($numrows = TrueRows($cursor)) == 2)
    or ErrMsgF("Expected to fetch 2 rows, got %s.\n", $numrows);

    Test($state or $cursor->finish)
       or DbiError($dbh->err, $dbh->errstr);

    Test($state or undef $cursor or 1);

    #
    #   Finally drop the test table.
    #
    Test($state or $dbh->do("DROP TABLE $table"))
       or DbiError($dbh->err, $dbh->errstr);

}