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test-lib: some shells do not let $? propagate into an eval

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In 3bf7886 (test-lib: Let tests specify commands to be run at end of
test, 2010-05-02), the git test harness learned to run cleanup
commands unconditionally at the end of a test.  During each test,
the intended cleanup actions are collected in the test_cleanup variable
and evaluated.  That variable looks something like this:

	eval_ret=$?; clean_something && (exit "$eval_ret")
	eval_ret=$?; clean_something_else && (exit "$eval_ret")
	eval_ret=$?; final_cleanup && (exit "$eval_ret")
	eval_ret=$?

All cleanup actions are run unconditionally but if one of them fails
it is properly reported through $eval_ret.

On FreeBSD, unfortunately, $? is set at the beginning of an ‘eval’
to 0 instead of the exit status of the previous command.  This results
in tests using test_expect_code appearing to fail and all others
appearing to pass, unless their cleanup fails.  Avoid the problem by
setting eval_ret before the ‘eval’ begins.

Thanks to Jeff King for the explanation.

Cc: Jeff King <peff@peff.net>
Cc: Johannes Sixt <j6t@kdbg.org>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2010-05-06 03:41:10 -05:00 committed by Junio C Hamano
parent 3bf7886705
commit b6b0afdc30
2 changed files with 25 additions and 3 deletions
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21
t/t0000-basic.sh
View file

@ -73,6 +73,27 @@ then
exit 1
fi
clean=no
test_expect_success 'tests clean up after themselves' '
test_when_finished clean=yes
'
cleaner=no
test_expect_code 1 'tests clean up even after a failure' '
test_when_finished cleaner=yes &&
(exit 1)
'
if test $clean$cleaner != yesyes
then
say "bug in test framework: cleanup commands do not work reliably"
exit 1
fi
test_expect_code 2 'failure to clean up causes the test to fail' '
test_when_finished "(exit 2)"
'
################################################################
# Basics of the basics

7
t/test-lib.sh
View file

@ -366,8 +366,9 @@ test_debug () {
}
test_run_ () {
test_cleanup='eval_ret=$?'
test_cleanup=:
eval >&3 2>&4 "$1"
eval_ret=$?
eval >&3 2>&4 "$test_cleanup"
return 0
}
@ -567,8 +568,8 @@ test_cmp() {
# the test to pass.
test_when_finished () {
test_cleanup="eval_ret=\$?; { $*
} && (exit \"\$eval_ret\"); $test_cleanup"
test_cleanup="{ $*
} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
}
# Most tests can use the created repository, but some may need to create more.