diff options
Diffstat (limited to 'tests/invert.tests')
| -rw-r--r-- | tests/invert.tests | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/invert.tests b/tests/invert.tests new file mode 100644 index 0000000..f339d41 --- /dev/null +++ b/tests/invert.tests @@ -0,0 +1,32 @@ +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# +# tests of return value inversion +# placeholder for future expansion + +# user subshells (...) did this wrong in bash versions before 2.04 + +! ( echo hello | grep h >/dev/null 2>&1 ); echo $? +! echo hello | grep h >/dev/null 2>&1 ; echo $? + +! true ; echo $? +! false; echo $? + +! (false) ; echo $? +! (true); echo $? + +! true | false ; echo $? +! false | true ; echo $? + +! (true | false) ; echo $? +! (false | true) ; echo $? |