test: truncate: improve the test added in the previous commit

* tests/truncate/multiple-files.sh: Check that nothing is printed to
standard output and that standard error has the correct error.

diff --git a/tests/truncate/multiple-files.sh b/tests/truncate/multiple-files.sh
index dfde9fac2c63a54ec34f9860b6a78573740dd69f..d7a984c4205a4f9d6f0df97fba596199c4fe25dd 100755 (executable)
--- a/tests/truncate/multiple-files.sh
+++ b/tests/truncate/multiple-files.sh
@@ -18,9 +18,16 @@
 
 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
 print_ver_ truncate
+getlimits_
 
-returns_ 1 truncate -s0 a . b || fail=1
+returns_ 1 truncate -s0 a . b > out 2> err || fail=1
 test -f a || fail=1
 test -f b || fail=1
+compare /dev/null out || fail=1
+cat <<EOF > exp-err || framework_failure_
+truncate: cannot open '.' for writing: $EISDIR
+EOF
+compare exp-err err || fail=1
+
 
 Exit $fail