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;;; run-coverage-file.el --- Undercover setup for per-file coverage runs -*- lexical-binding: t; -*-
;;; Commentary:
;; Loaded by `make coverage' before each test file runs, BEFORE
;; chime.el is loaded. Instrumenting must happen first so the
;; subsequent load picks up the instrumented source.
;;
;; Coverage data is merged across per-file invocations into a single
;; simplecov JSON at .coverage/simplecov.json (under the project root).
;;; Code:
(unless (require 'undercover nil t)
(message "")
(message "ERROR: undercover not installed.")
(message "Run 'make setup' to install development dependencies.")
(message "")
(kill-emacs 1))
;; Resolve project root from this file's location so undercover patterns
;; and the report-file path don't depend on default-directory at load time.
(defvar run-coverage--project-root
(file-name-directory
(directory-file-name
(file-name-directory (or load-file-name buffer-file-name))))
"Absolute path to the chime project root.")
;; Force coverage collection in non-CI environments. Must be set after
;; loading undercover because the library's top-level form
;; `(setq undercover-force-coverage (getenv "UNDERCOVER_FORCE"))' would
;; otherwise overwrite the value.
(setq undercover-force-coverage t)
;; The `undercover' macro splices each configuration list into `(list ,@it)',
;; which evaluates the elements. Wildcard strings have to stay atoms — using
;; `(:files ...)' form lets us evaluate `expand-file-name' to an absolute path.
(undercover (:files (expand-file-name "chime.el" run-coverage--project-root))
(:report-format 'simplecov)
(:report-file (expand-file-name ".coverage/simplecov.json"
run-coverage--project-root))
(:merge-report t)
(:send-report nil))
;;; run-coverage-file.el ends here
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