On 2021-04-22 20:49:04+0700, Đoàn Trần Công Danh <congdanhqx@xxxxxxxxx> wrote:
> On 2021-04-21 16:32:40-0700, Junio C Hamano <gitster@xxxxxxxxx> wrote:
> > Eric Sunshine <sunshine@xxxxxxxxxxxxxx> writes:
> >
> > > On Wed, Apr 21, 2021 at 12:55 PM Eric Sunshine <sunshine@xxxxxxxxxxxxxx> wrote:
> > >> count_ls_files 5 -s &&
> > >> count_ls_files 3 -u &&
> > >> count_ls_files 1 -u one~HEAD &&
> > >> ...
> > >>
> > >> The nice thing about having a helper function is that it can clean up
> > >> after itself by not leaving a new file lying around, thus you wouldn't
> > >> have to make adjustments to the expected number of untracked files (as
> > >> mentioned in the commit message). If this is the sort of thing which
> > >> comes up often enough (if there are more such cases beyond the two
> > >> scripts you changed in this series), then it might make sense to
> > >> promote the helper function to test-lib-functions.sh.
> > >
> > > The frequency with which this idiom crops up with commands beyond
> > > git-ls-files suggests the more general solution of supporting it
> > > directly in test-lib-functions.sh for any command. For instance:
> > >
> > > test_cmd_line_count = 3 git ls-files -u &&
> > >
> > > Or, perhaps, a new mode of test_line_count():
> > >
> > > test_line_count = 3 -c git ls-files -u &&
>
> Hm, I'm not sure how would we implement such mode:
>
> * Will we run such command in a subprocess and and pipe to "wc -l"
> directly to avoid a temporary file, but we will lose the exit code
> of running command in process?
> * Will we run in a separated chain? Thus, a temporary file would be
> created, skimming over test-lib-functions.sh, I couldn't find any
> convention for creating such files, except for specific use cases,
> let's say "*.config".
> * Another clever hacks that I don't know *shrug*
Hm, I figured out, just a bit insane for reviewing.
-----8<--------
Subject: [PATCH] test-lib-functions: add test_line_count_in helper
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@xxxxxxxxx>
---
t/t0000-basic.sh | 7 +++++
t/test-lib-functions.sh | 62 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 69 insertions(+)
diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index 705d62cc27..2ddb50e919 100755
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -60,6 +60,13 @@ test_expect_success '.git/objects should have 3 subdirectories' '
test_line_count = 3 full-of-directories
'
+test_expect_success 'check test_line_count_in' '
+ test_line_count_in --stdout = 4 --stderr = 3 -- sh -c "
+ printf \"%s\\n\" 1 2 3 4
+ printf >&2 \"%s\\n\" a b c
+ "
+'
+
################################################################
# Test harness
test_expect_success 'success is reported like this' '
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 6348e8d733..3b3dc3020a 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -817,6 +817,68 @@ test_line_count () {
fi
}
+# test_line_count_in checks if stdout and/or stderr has the number of lines it
+# ought to. E.g.
+#
+# test_expect_success 'product 1 line in stdout and 2 lines in stderr' '
+# test_line_count_in --stdout = 1 --stderr = 3 do_something
+# '
+test_line_count_in () {
+ local out_ops=-ge
+ local out_val=0
+ local err_ops=-ge
+ local err_val=0
+ local opt_set=
+
+ while test $# != 0
+ do
+ case "$1" in
+ --stdout)
+ if test $# -lt 3
+ then
+ BUG "need ops and value for --stdout"
+ fi
+ out_ops=$2
+ out_val=$3
+ opt_set=yes
+ shift 3
+ ;;
+ --stderr)
+ if test $# -lt 3
+ then
+ BUG "need ops and value for --stderr"
+ fi
+ err_ops=$2
+ err_val=$3
+ opt_set=yes
+ shift 3
+ ;;
+ --)
+ shift
+ break
+ ;;
+ esac
+ done
+
+ if test -z "$opt_set"
+ then
+ BUG "need check ops for test_line_count_in"
+ else
+ ! (
+ test $(
+ (
+ test $(
+ ( "$@" || echo "'$*' run into failure" >&3) |
+ wc -l
+ ) "$out_ops" "$out_val" ||
+ echo "test_line_count_in --stdout: !$out_ops $out_val '$*'" >&3
+ ) 2>&1 | wc -l
+ ) "$err_ops" "$err_val" ||
+ echo "test_line_count_in --stderr: !$out_ops $out_val '$*'" >&3
+ ) 3>&1 | grep .
+ fi
+}
+
test_file_size () {
test "$#" -ne 1 && BUG "1 param"
test-tool path-utils file-size "$1"
--
2.31.1.500.gbc6bbdd36b
