Am 21.11.2015 um 09:11 schrieb Johannes Sixt:
> Am 20.11.2015 um 21:50 schrieb René Scharfe:
>> Extract a helper function for searching for a pattern in a file and
>> printing the whole file if the pattern is not found. It is useful
>> when starting tests with --verbose for debugging purposes.
>
>> +# Check if a file contains an expected pattern.
>> +test_must_contain () {
>> + if grep "$1" "$2"
>> + then
>> + return 0
>> + else
>> + echo "didn't find /$1/ in '$2', it contains:"
>> + cat "$2"
>> + return 1
>> + fi
>> +}
>
> There is already test_i18n_grep. Should it be folded into this function?
That's a good point. But how? test_i18ngrep can also work as a
filter and pass on options, so we'd need to parse all parameters and
redirect stdin to a temporary file unless a file was specified. Or
we could be sloppy and just check if the last parameter is a file and
if yes then spew it out.
> Wouldn't we also want to have a function test_must_not_contain?
I doubt it. In such a function grep would display the lines that match
unexpectedly already, so showing the whole file after that won't add
much more of interest.
> IMHO, we should not increase the number of functions that give a bonus
> only when there is a test case failure. They do not scale well: There is
> a permanent mental burden on every reviewer to watch out that they are
> used in new tests. But without those functions, the burden is on the one
> person investigating a test case failure, who has to live without the
> debugging support.
test_must_contain doesn't have to be used everywhere, only in cases
where a file is shown and grepped. I agree that letting an existing
function do that job (or deciding that the job is not worth doing) is
preferable.
Here's how I imagine the sloppy add-on to test_i18ncmp to look:
diff --git a/t/test-lib.sh b/t/test-lib.sh
index 16c4d7b..db64600 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -985,13 +985,28 @@ test_i18ncmp () {
test_i18ngrep () {
if test -n "$GETTEXT_POISON"
then
: # pretend success
elif test "x!" = "x$1"
then
shift
! grep "$@"
else
grep "$@"
+
+ rc=$?
+ if test $rc != 0
+ then
+ while test $# -gt 1
+ do
+ shift
+ done
+ if test -f "$1"
+ then
+ echo "Expected pattern not found, content is:"
+ cat "$1"
+ fi
+ return $rc
+ fi
fi
}
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