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tests: Add documentation, make interactive debugging possible. 

* tests/openpgp/README: Add documentation about debugging and
interfacing with GnuPG.
* tests/openpgp/run-tests.scm (test::run-sync): Hand stdin to the
child so that we can use a repl in the tests.

Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2016-09-20 15:29:57 +02:00
parent c644962fcf
commit 7e0379a754
2 changed files with 45 additions and 1 deletions
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44
tests/openpgp/README
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@ -89,6 +89,50 @@ element of list while displaying the progress appropriately.
for-each-p' is similar, but accepts another callback before the 'list'
argument to format each item. for-each-p can be safely nested, and
the inner progress indicator will be abbreviated using '.'.
** Debugging tests
Say you are working on a new test called 'your-test.scm', you can run
it on its own using
obj $ make -C tests/openpgp check XTESTS=your-test.scm
but something isn't working as expected. There are several little
gadgets that might help. The first one is 'trace', a function that
prints the value given to it and evaluates to it. E.g.
(trace (+ 2 3))
prints '5' and evaluates to 5. Also, there is an 'assert' macro that
aborts the execution if its argument does not evaluate to a trueish
value. Feel free to express invariants with it.
You can also get an interactive repl by dropping
(interactive-repl (current-environment))
anywhere you like.
** Interfacing with gpg
defs.scm defines several convenience functions. Say you want to parse
the colon output from gpg, there is gpg-with-colons that splits the
result at newlines and colons, so you can use the result like this:
(define (fpr some-key)
(list-ref (assoc "fpr" (gpg-with-colons
`(--with-fingerprint
--list-secret-keys ,some-key)))
9))
Or if you want to count all non-revoked uids for a given key, do
(define (count-uids-of-secret-key some-key)
(length (filter (lambda (x) (and (string=? "uid" (car x))
(string=? "u" (cadr x))))
(gpg-with-colons
`(--with-fingerprint
--list-secret-keys ,some-key)))))
** Temporary files
(lettmp <bindings> <body>) will create and delete temporary files that
you can use in <body>. (with-temporary-working-directory <body>) will

2
tests/openpgp/run-tests.scm
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@ -85,7 +85,7 @@
(define (run-sync . args)
(with-working-directory directory
(let* ((p (inbound-pipe))
(pid (spawn-process-fd (append command args) CLOSED_FD
(pid (spawn-process-fd (append command args) 0
(:write-end p) (:write-end p))))
(close (:write-end p))
(splice (:read-end p) STDERR_FILENO)