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;;; test-coverage-elisp-helpers.el --- Tests for coverage-elisp helpers + runner -*- lexical-binding: t; -*-
;;; Commentary:
;; Sibling `test-coverage-elisp--detect.el` covers the detect heuristic.
;; This file fills in the rest:
;;
;; cj/--coverage-elisp-project-root
;; cj/--coverage-elisp-report-path
;; cj/--coverage-elisp-run
;;
;; projectile / compilation-start are stubbed.
;;; Code:
(require 'ert)
(require 'cl-lib)
(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
(require 'coverage-elisp)
;;; cj/--coverage-elisp-project-root
(ert-deftest test-coverage-elisp-project-root-uses-explicit-arg ()
"Normal: an explicit ROOT argument wins over the fallbacks."
(should (equal (cj/--coverage-elisp-project-root "/proj/root/")
"/proj/root/")))
(ert-deftest test-coverage-elisp-project-root-falls-back-to-projectile ()
"Normal: with no ROOT, projectile's root is returned."
(cl-letf (((symbol-function 'projectile-project-root)
(lambda () "/proj/from-projectile/")))
(should (equal (cj/--coverage-elisp-project-root)
"/proj/from-projectile/"))))
(ert-deftest test-coverage-elisp-project-root-falls-back-to-default-directory ()
"Boundary: with neither arg nor projectile, falls back to `default-directory'."
(let ((default-directory "/proj/from-default/"))
(cl-letf (((symbol-function 'fboundp)
(lambda (sym) (not (eq sym 'projectile-project-root)))))
(should (equal (cj/--coverage-elisp-project-root)
"/proj/from-default/")))))
;;; cj/--coverage-elisp-report-path
(ert-deftest test-coverage-elisp-report-path-resolves-relative-to-root ()
"Normal: report path appends `.coverage/simplecov.json' to ROOT."
(should (equal (cj/--coverage-elisp-report-path "/proj/root/")
"/proj/root/.coverage/simplecov.json")))
(ert-deftest test-coverage-elisp-report-path-no-root-uses-fallback ()
"Boundary: with no ROOT, expands against the fallback root."
(let ((default-directory "/proj/from-default/"))
(cl-letf (((symbol-function 'fboundp)
(lambda (sym) (not (eq sym 'projectile-project-root)))))
(should (equal (cj/--coverage-elisp-report-path)
"/proj/from-default/.coverage/simplecov.json")))))
;;; cj/--coverage-elisp-run
(ert-deftest test-coverage-elisp-run-starts-make-coverage-compilation ()
"Normal: run launches `make coverage' via `compilation-start' with a
named buffer and registers a finish hook on the compilation buffer."
(let ((cmd nil)
(registered-hook nil)
(buf (generate-new-buffer "*coverage-run*")))
(unwind-protect
(cl-letf (((symbol-function 'compilation-start)
(lambda (c &rest _) (setq cmd c) buf))
((symbol-function 'projectile-project-root)
(lambda () "/proj/root/")))
(cj/--coverage-elisp-run (lambda (_) nil))
(with-current-buffer buf
(setq registered-hook compilation-finish-functions)))
(when (buffer-live-p buf) (kill-buffer buf)))
(should (equal cmd "make coverage"))
(should registered-hook)))
(ert-deftest test-coverage-elisp-run-callback-fires-on-success ()
"Normal: when the compilation finishes with `finished', the callback gets
the report path."
(let ((reported nil)
(buf (generate-new-buffer "*coverage-run*")))
(unwind-protect
(cl-letf (((symbol-function 'compilation-start)
(lambda (&rest _) buf))
((symbol-function 'projectile-project-root)
(lambda () "/proj/root/")))
(cj/--coverage-elisp-run (lambda (path) (setq reported path)))
;; Fire the hook installed by run().
(with-current-buffer buf
(run-hook-with-args 'compilation-finish-functions
buf "finished\n")))
(when (buffer-live-p buf) (kill-buffer buf)))
(should (equal reported "/proj/root/.coverage/simplecov.json"))))
(ert-deftest test-coverage-elisp-run-callback-skipped-on-failure ()
"Boundary: a non-`finished' status doesn't fire the callback."
(let ((reported nil)
(buf (generate-new-buffer "*coverage-run*")))
(unwind-protect
(cl-letf (((symbol-function 'compilation-start)
(lambda (&rest _) buf))
((symbol-function 'projectile-project-root)
(lambda () "/proj/root/")))
(cj/--coverage-elisp-run (lambda (path) (setq reported path)))
(with-current-buffer buf
(run-hook-with-args 'compilation-finish-functions
buf "exited abnormally\n")))
(when (buffer-live-p buf) (kill-buffer buf)))
(should-not reported)))
(provide 'test-coverage-elisp-helpers)
;;; test-coverage-elisp-helpers.el ends here
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