function create_test_ncfile ( ncfile )
% CREATE_TEST_NCFILE:  creates a file to use for several tests.
%

[ncid, status] = mexnc ( 'create', ncfile, nc_clobber_mode );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''create'' failed on %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end



%
% Create the fixed dimension.  
len_x = 4;
[xdimid, status] = mexnc ( 'def_dim', ncid, 'x', len_x );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_dim'' failed on dim x, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


len_y = 6;
[ydimid, status] = mexnc ( 'def_dim', ncid, 'y', len_y );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_dim'' failed on dim y, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


%
% Create the double singleton variable
[varid, status] = mexnc ( 'def_var', ncid, 'double_singleton', nc_double, 0, [] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  %s\n', mfilename, ncerr_msg );
	error ( msg );
end



%
% Create the float singleton variable
[varid, status] = mexnc ( 'def_var', ncid, 'single_singleton', nc_float, 0, [] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  %s\n', mfilename, ncerr_msg );
	error ( msg );
end



%
% Create the int singleton variable
[varid, status] = mexnc ( 'def_var', ncid, 'int_singleton', nc_int, 0, [] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  %s\n', mfilename, ncerr_msg );
	error ( msg );
end



%
% Create the short singleton variable
[varid, status] = mexnc ( 'def_var', ncid, 'short_singleton', nc_short, 0, [] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  %s\n', mfilename, ncerr_msg );
	error ( msg );
end



%
% Create the byte singleton variable
[varid, status] = mexnc ( 'def_var', ncid, 'byte_singleton', nc_byte, 0, [] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  %s\n', mfilename, ncerr_msg );
	error ( msg );
end



%
% Create the char singleton variable
[varid, status] = mexnc ( 'def_var', ncid, 'char_singleton', nc_char, 0, [] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  %s\n', mfilename, ncerr_msg );
	error ( msg );
end



[varid, status] = mexnc ( 'def_var', ncid, 'z_double', nc_double, 2, [ydimid xdimid] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_var'' failed on var x_short, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


[varid, status] = mexnc ( 'def_var', ncid, 'z_float', nc_float, 2, [ydimid xdimid] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_var'' failed on var x_short, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


[varid, status] = mexnc ( 'def_var', ncid, 'z_int', nc_int, 2, [ydimid xdimid] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_var'' failed on var x_short, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


[varid, status] = mexnc ( 'def_var', ncid, 'z_short', nc_short, 2, [ydimid xdimid] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_var'' failed on var x_short, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


[varid, status] = mexnc ( 'def_var', ncid, 'z_byte', nc_byte, 2, [ydimid xdimid] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_var'' failed on var z_byte, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


[varid, status] = mexnc ( 'def_var', ncid, 'z_char', nc_char, 2, [ydimid xdimid] );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''def_var'' failed on var z_byte, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end


[status] = mexnc ( 'enddef', ncid );
if ( status ~= 0 )
	ncerr_msg = mexnc ( 'strerror', status );
	msg = sprintf ( '%s:  ''enddef'' failed, file %s, error message '' %s ''\n', mfilename, ncfile, ncerr_msg );
	error ( msg );
end

[varid, status] = mexnc('INQ_VARID', ncid, 'z_double');
if ( status ~= 0 )
	msg = sprintf ( '%s:  INQ_VARID failed\n', mfilename );
	error ( msg );
end



%
% CLOSE
status = mexnc ( 'close', ncid );
if ( status ~= 0 )
	error ( 'CLOSE failed' );
end


return