[PATCH v2 00/10] test: (hopefully) better test prerequisites

[Dmitry Kurochkin]

New version of [1] patch series.  Changes:

v2 since v1:

* Add test_require_external_prereq function to explicitly check for
  external dependencies, use it in test_emacs.

* Indenting fixes.

* Use $binary instead of $1 in test_declare_external_prereq.

Regards,
  Dmitry