Run ERT tests for Emacs Lisp with assertions and batch mode.
npx skills add https://github.com/hugoduncan/library-skills --skill ert
Please help me install this Agent Skill. Skill: ert Source: https://github.com/hugoduncan/library-skills/tree/main/plugins/emacs-libraries/skills/ert Command: npx skills add https://github.com/hugoduncan/library-skills --skill ert
ERT provides a structured framework for defining and running Emacs Lisp tests, enabling interactive and batch testing, with helpful failure reports to reduce debugging time and guard against regressions.
ert-deftest, including optional docstrings and metadata.should, should-not, and should-error for precise validations and error checks.cl-letf, unwind-protect) to isolate tests.To get started:
(require 'ert)(ert-deftest my-test ()
"Simple test."
(should (= 1 1)))
M-x ert RET t RETemacs -batch -l ert -f ert-run-tests-batch-and-exitd to debug a failing test.High-intent search queries and answers about installing and using this skill.
Use ERT (Emacs Lisp Regression Testing) to write tests with `ert-deftest`, define assertions using `should`, `should-not`, and `should-error`, then run them interactively via M-x ert or in batch mode for CI/CD pipelines. ERT is built into Emacs 24+.
Yes, ERT supports batch-mode execution with `emacs -batch -l ert -f ert-run-tests-batch-and-exit`, enabling automated testing in CI/CD workflows. Results include failure reports and exit codes for pipeline integration.
ERT provides integrated debugging with backtraces and interactive reruns. Press `d` in the *ERT* buffer to debug a failing test, view detailed failure reports, and quickly locate issues without leaving Emacs.
Use patterns like `cl-letf` for dynamic binding and `unwind-protect` for resource cleanup to mock dependencies and isolate tests. These techniques ensure robust test cleanup and prevent state leakage between test runs.
ERT supports tag-based organization and naming conventions for test structure. Use metadata, docstrings, and test selectors to categorize and filter tests, enabling flexible test execution and clear test intent.
captainflasmrWrite, understand, and debug Emacs Lisp code with formatted docstrings.
TestAny-ioTrigger and monitor Testany test pipelines with status polling and result reporting.
majorgreysAutomates org-roam note creation, search, linking, tagging, and diagnostics via emacsclient.
moogahIsolate syntax and paren errors in Emacs Lisp and org-mode elisp blocks.