development/git
development/git
1
0
Fork 0
mirror of https://github.com/git/git synced 2024-08-27 11:39:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

test-lib.sh: support -x option for shell-tracing

Browse source 
Usually running a test under "-v" makes it clear which
command is failing. However, sometimes it can be useful to
also see a complete trace of the shell commands being run in
the test. You can do so without any support from the test
suite by running "sh -x tXXXX-foo.sh". However, this
produces quite a large bit of output, as we see a trace of
the entire test suite.

This patch instead introduces a "-x" option to the test
scripts (i.e., "./tXXXX-foo.sh -x"). When enabled, this
turns on "set -x" only for the tests themselves. This can
still be a bit verbose, but should keep things to a more
manageable level. You can even use "--verbose-only" to see
the trace only for a specific test.

The implementation is a little invasive. We turn on the "set
-x" inside the "eval" of the test code. This lets the eval
itself avoid being reported in the trace (which would be
long, and redundant with the verbose listing we already
showed). And then after the eval runs, we do some trickery
with stderr to avoid showing the "set +x" to the user.

We also show traces for test_cleanup functions (since they
can impact the test outcome, too). However, we do avoid
running the noop ":" cleanup (the default if the test does
not use test_cleanup at all), as it creates unnecessary
noise in the "set -x" output.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-10-10 02:47:27 -04:00 committed by Junio C Hamano
parent 8ad1652418
commit a136f6d8ff
2 changed files with 44 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
t/README
View file

@ -82,6 +82,12 @@ appropriately before running "make".
numbers matching <pattern>. The number matched against is
simply the running count of the test within the file.
-x::
Turn on shell tracing (i.e., `set -x`) during the tests
themselves. Implies `--verbose`. Note that this can cause
failures in some tests which redirect and test the
output of shell functions. Use with caution.
-d::
--debug::
This may help the person who is developing a new test.

42
t/test-lib.sh
View file

@ -233,6 +233,10 @@ do
--root=*)
root=$(expr "z$1" : 'z[^=]*=\(.*\)')
shift ;;
-x)
trace=t
verbose=t
shift ;;
*)
echo "error: unknown test option '$1'" >&2; exit 1 ;;
esac
@ -517,10 +521,39 @@ maybe_setup_valgrind () {
fi
}
# This is a separate function because some tests use
# "return" to end a test_expect_success block early
# (and we want to make sure we run any cleanup like
# "set +x").
test_eval_inner_ () {
# Do not add anything extra (including LF) after '$*'
eval "
test \"$trace\" = t && set -x
$*"
}
test_eval_ () {
# This is a separate function because some tests use
# "return" to end a test_expect_success block early.
eval </dev/null >&3 2>&4 "$*"
# We run this block with stderr redirected to avoid extra cruft
# during a "-x" trace. Once in "set -x" mode, we cannot prevent
# the shell from printing the "set +x" to turn it off (nor the saving
# of $? before that). But we can make sure that the output goes to
# /dev/null.
#
# The test itself is run with stderr put back to &4 (so either to
# /dev/null, or to the original stderr if --verbose was used).
{
test_eval_inner_ "$@" </dev/null >&3 2>&4
test_eval_ret_=$?
if test "$trace" = t
then
set +x
if test "$test_eval_ret_" != 0
then
say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
fi
fi
} 2>/dev/null
return $test_eval_ret_
}
test_run_ () {
@ -531,7 +564,8 @@ test_run_ () {
eval_ret=$?
teardown_malloc_check
if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"
if test -z "$immediate" || test $eval_ret = 0 ||
test -n "$expecting_failure" && test "$test_cleanup" != ":"
then
setup_malloc_check
test_eval_ "$test_cleanup"