This package implements new commands to go within the first argument of \ifthenelse to test whether a string is void or not, if a command is defined or equivalent to another. It includes also the possibility to make use of the complex expressions introduced by the package calc, together with the ability of defining new commands to handle complex tests. This package requires the e-TEX features. What's new v.1. - \cnttest and \dimtest now accept <= and >= comparisons. - I renames \terminateswith in \endswith. v1.2 - Corrected a bug with \newtest v1.3 - Removed a spurious space in the code. This material is subject to the LaTeX Project Public License. See http://www.ctan.org/tex-archive/help/Catalogue/licenses.lppl.html for the details of that license.