Re: [O] [babel] Trying to add ERT test cases

[Sebastien Vauban]

Hi Eric,

Eric Schulte wrote:
>> * Test
>>
>> #+begin_src emacs-lisp
>> (ert-deftest ob-tangle/speed-command-r ()
>>   "Test that speed command `r' does demote the headline."
>>   (org-test-at-id "4ee368b8-cf7c-4269-98c0-b28dcf94ff2b"
>>     (goto-char (point-at-bol))
>>     (org-self-insert-command ?r)
>>     (goto-char (point-at-bol))
>>     (should (looking-at "\\*\\* Speed command"))
>>     (delete-char 1)))
>> #+end_src
>>
>> When running the test _once_, I get my level-1 headline preceded by 114
>> occurrences of ^M (yes, 114 for 1 test run!):
>>
>> ^M^M^M...^M^M^M* Speed command (this must be at level-1 headline)
>>
>> and no demotion of my headline.
>>
>> Do you understand such?
>
> So it looks like these self-insert-command functions are special cases.
> They don't look to their arguments to see what key-press invoked them,
> but rather they call the `this-command-keys' function for this purpose.
> We can force the behavior we want by overriding the definition of this
> function locally, taking this approach the following test case worked
> for me
>
> #+begin_src emacs-lisp
>   (ert-deftest ob-tangle/speed-command-r ()
>     "Test that speed command `r' does demote the headline."
>     (org-test-with-temp-text "* Speed command"
>       (flet ((this-command-keys () "r")) (org-self-insert-command ?r))
>       (goto-char (point-min))
>       (should (looking-at "\\*\\* Speed command"))))
> #+end_src

It passes!  So does:

#+begin_src emacs-lisp
  (ert-deftest ob-tangle/speed-command-r ()
    "Test that speed command `r' does demote the headline."
    (org-test-with-temp-text "* Speed command"
      (flet ((this-command-keys () "r")) (org-self-insert-command ?a))
      (goto-char (point-min))
      (should (looking-at "\\*\\* Speed command"))))
#+end_src

where the argument of `org-self-insert-command' is `a' (could be anything, it
seems). Very weird.

I just understood as well why I got 114 ^M: 114 is the ASCII code for `r', and
`\r' is as well ^M -- though `r' is not...

>> [...] I read thru the page you link to. Just a minor thing: link to "See
>> ert-publish-test.el for the implementation" is broken.
>>
>> Do you have a solution for checking against internal broken links?
>
> Nothing comes immediately to mind.
>
>> I still have my idea of letting DOT draw an graph of the
>> interconnection between pages, so that we see missing pages, and
>> unreachable ones (files on the file system, but never linked). I
>> should (find the time to) extend it enough to serve that purpose.
>
> This could be useful, like a site map for worg.  As an intermediate step
> I could see it being useful to simply print out all internal links whose
> target does not exist on the file system.

I'll try to come up with something (in Babel) soon.

Best regards,
  Seb

-- 
Sebastien Vauban