Use undercover to check lisp test coverage

Author: galaunay

Cask

@@ -12,4 +12,5 @@
 
 (development
  (depends-on "f")
- (depends-on "ert-runner"))
+ (depends-on "ert-runner")
+  (depends-on "undercover"))

test/test-helper.el

@@ -7,6 +7,11 @@
 					    elpy-dir
 					    (getenv "PYTHONPATH")))
   (add-to-list 'process-environment "ELPY_TEST=1"))
+
+;; coverage
+(when (require 'undercover nil t)
+  (undercover "*.el"))
+
 (require 'elpy)
 ;; Travis regularly has some lag for some reason.
 (setq elpy-rpc-timeout 10)