Validates common string formats including financial identifiers (ISIN, CUSIP, SEDOL, FIGI, IBAN, LEI), publication identifiers (ISBN, ISSN, DOI, ORCID), and general formats (email, UUID, URL, semver), with check digit verification where applicable.

This is a randomized property-based testing library for Common Lisp. Rather than being a full-fledged general test framework in its own right, it's designed to embed randomized tests in whatever framework you like.

Documentation at https://melpa.org/#/checkbox

Parses and compiles CSS nth-checks to highly optimized functions.

This package provides a minimal R-package to approximately detect global and imported functions or variables from R-source code or R-packages by static code analysis.

Validates data frames against a defined schema. Produces a report of the checks performed and any issues found, with index and entry value where appropriate. Backend checks are performed using pointblank Richard Iannone et al (2025) <doi:10.32614/CRAN.package.pointblank>.

easy to use procondition and postcondition checks of procedures

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

Identifies the entries with patterned responses for psychometric scales. The patterns included in the package are identical (a, a, a), ascending (a, b, c), descending (c, b, a), alternative (a, b, a, b / a, b, c, a, b, c).

When an environment is left open, LaTeX gives an error at the end of the document. However it only informs about the first of them, while the rest are shown with meaningless errors: (``\end occurred inside a group at level N'') This package replaces these errors with more useful messages which show which environments (in reverse order) were not closed. There are no user macros: just use the package.

Compute a single hash of the file contents of a directory.

The package provides a Lua script written for the sole purpose of detecting undefined and unused references from LaTeX auxiliary or bibliography files.

test.check is a Clojure property-based testing tool inspired by QuickCheck. The core idea of test.check is that instead of enumerating expected input and output for unit tests, you write properties about your function that should hold true for all inputs. This lets you write concise, powerful tests.

This package provides an user interface for making LaTeX cross-references flexibly, while allowing to have them checked for consistency with the document structure as typeset. Statements such as above, on the next page, previously, can be given to \zcheck in free-form, and a set of checks can be specified to be run against a given label, which will result in a warning at compilation time if any of these checks fail. \zctarget and the zcregion environment are also defined as a means to easily set label targets to arbitrary places in the text which can be referred to by \zcheck.

This package provides a pytest plugin that allows multiple failures per test.

This module provides a test that checks all dependencies have been installed properly.

Devel::CheckBin is a perl module that checks whether a particular command is available.

Devel::CheckLib is a Perl module that checks whether a particular C library and its headers are available. You can also check for the presence of particular functions in a library, or even that those functions return particular results.

This package provides a test library for the Go language.

This module verifies if requirements described in a CPAN::Meta object are present.

editorconfig-checker is a lint tool to verify that a project matches the specifications in {.editorconfig

Argument checks & errors