Test _openid_dh_XXX_to_XXX() functions.
function testConversion() {
$this
->assertEqual(_openid_dh_long_to_base64('12345678901234567890123456789012345678901234567890'), 'CHJ/Y2mq+DyhUCZ0evjH8ZbOPwrS', '_openid_dh_long_to_base64() returned expected result.');
$this
->assertEqual(_openid_dh_base64_to_long('BsH/g8Nrpn2dtBSdu/sr1y8hxwyx'), '09876543210987654321098765432109876543210987654321', '_openid_dh_base64_to_long() returned expected result.');
$this
->assertEqual(_openid_dh_long_to_binary('12345678901234567890123456789012345678901234567890'), "", '_openid_dh_long_to_binary() returned expected result.');
$this
->assertEqual(_openid_dh_binary_to_long(""), '09876543210987654321098765432109876543210987654321', '_openid_dh_binary_to_long() returned expected result.');
}