Ert batch-mode error

[Andreas Röhler]

Hi all,

running occasionally into a strange error when testing with Emacs Ert 
test-suite.
Consider the test below from following source:

https://github.com/emacs-berlin/syntactic-close/blob/master/test/syntactic-close-python-tests.el

(ert-deftest syntactic-close-python-tqs-sq-test-eS7oPB ()
  (syntactic-close-test-with-python-buffer
      "'''asdf"
    (goto-char (point-max))
    (syntactic-close)
    (should
     ;; (char-equal (char-before (- (point) 2)) ?')
     (char-equal (char-before) ?')
     )))

It's intended to test for triple-quoted strings. Also the commented
line should do the test, but fails in batch-mode.

M-x ert RET syntactic-close-python-tqs-sq-test-eS7oPB RET

however succeeds even if this line is uncommented and the following
line commented instead. So the error occurs only in batch-mode.

Any explanation?

Current syntactic-close is provided for example by: git clone 
https://github.com/emacs-berlin/syntactic-close.git

Thanks,
Andreas