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diff --git a/tests/grub_script_not.in b/tests/grub_script_not.in
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+#! @builddir@/grub-shell-tester
+#
+# Copyright (C) 2010 Free Software Foundation, Inc.
+#
+# GRUB 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.
+#
+# GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
+
+true
+echo $?
+
+! true
+echo $?
+
+false
+echo $?
+
+! false
+echo $?
+
+#
+# Negated forms (copied from grub_script_if.in)
+#
+
+#basic if, execute
+if ! true; then echo yes; fi
+
+#basic if, no execution
+if ! false; then echo no; fi
+
+#if else, execute if path
+if ! true; then echo yes; else echo no; fi
+
+#if else, execute else path
+if ! false; then echo no; else echo yes; fi
+
+#if elif, execute elif
+if ! false; then echo no; elif ! true; then echo yes; fi
+
+#if elif else, execute else
+if ! false; then echo no; elif ! false; then echo no; else echo yes; fi
+
+#if elif(1) elif(2), execute elif(2)
+if false; then echo no; elif ! false; then echo no; elif ! true; then echo yes; fi
+
+#if elif(1) elif(2) else, execute else
+if false; then echo no; elif false; then echo no; elif ! false; then echo no; else echo yes; fi
+
+#if {if elif else}, execute elif
+if true; then if false; then echo no; elif ! true; then echo yes; else echo no; fi; fi
+
+#if {if elif} else, execute elif. ofcourse no dangling-else problem due to "fi"
+if true; then if ! false; then echo no; elif true; then echo yes; fi; else echo no; fi