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diff --git a/src/grep/tests/case-fold-titlecase b/src/grep/tests/case-fold-titlecase
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+#!/bin/sh
+# Check that case folding works even with titlecase and similarly odd chars.
+
+# Copyright 2014-2021 Free Software Foundation, Inc.
+
+# 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 <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+require_en_utf8_locale_
+require_compiled_in_MB_support
+LC_ALL=en_US.UTF-8
+export LC_ALL
+
+fail=0
+
+for testcase in \
+ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
+do
+ case $testcase in
+ 0)
+ a='\302\265' # U+00B5
+ b='\316\234' # U+039C
+ c='\316\274' # U+03BC
+ ;;
+ 1)
+ a='\111' # U+0049
+ b='\151' # U+0069
+ c='\304\260' # U+0130
+ ;;
+ 2)
+ a='\111' # U+0049
+ b='\151' # U+0069
+ c='\304\261' # U+0131
+ ;;
+ 3)
+ a='\123' # U+0053
+ b='\163' # U+0073
+ c='\305\277' # U+017F
+ ;;
+ 4)
+ a='\307\204' # U+01C4
+ b='\307\205' # U+01C5
+ c='\307\206' # U+01C6
+ ;;
+ 5)
+ a='\307\207' # U+01C7
+ b='\307\210' # U+01C8
+ c='\307\211' # U+01C9
+ ;;
+ 6)
+ a='\307\212' # U+01CA
+ b='\307\213' # U+01CB
+ c='\307\214' # U+01CC
+ ;;
+ 7)
+ a='\307\261' # U+01F1
+ b='\307\262' # U+01F2
+ c='\307\263' # U+01F3
+ ;;
+ 8)
+ a='\315\205' # U+0345
+ b='\316\231' # U+0399
+ c='\316\271' # U+03B9
+ ;;
+ 9)
+ a='\316\243' # U+03A3
+ b='\317\202' # U+03C2
+ c='\317\203' # U+03C3
+ ;;
+ 10)
+ a='\316\222' # U+0392
+ b='\316\262' # U+03B2
+ c='\317\220' # U+03D0
+ ;;
+ 11)
+ a='\316\230' # U+0398
+ b='\316\270' # U+03B8
+ c='\317\221' # U+03D1
+ ;;
+ 12)
+ a='\316\246' # U+03A6
+ b='\317\206' # U+03C6
+ c='\317\225' # U+03D5
+ ;;
+ 13)
+ a='\316\240' # U+03A0
+ b='\317\200' # U+03C0
+ c='\317\226' # U+03D6
+ ;;
+ 14)
+ a='\316\232' # U+039A
+ b='\316\272' # U+03BA
+ c='\317\260' # U+03F0
+ ;;
+ 15)
+ a='\316\241' # U+03A1
+ b='\317\201' # U+03C1
+ c='\317\261' # U+03F1
+ ;;
+ 16)
+ a='\316\230' # U+0398
+ b='\316\270' # U+03B8
+ c='\317\264' # U+03F4
+ ;;
+ 17)
+ a='\316\225' # U+0395
+ b='\316\265' # U+03B5
+ c='\317\265' # U+03F5
+ ;;
+ 18)
+ a='\341\271\240' # U+1E60
+ b='\341\271\241' # U+1E61
+ c='\341\272\233' # U+1E9B
+ ;;
+ 19)
+ a='\303\237' # U+00DF
+ b='\303\237' # U+00DF
+ c='\341\272\236' # U+1E9E
+ ;;
+ 20)
+ a='\316\231' # U+0399
+ b='\316\271' # U+03B9
+ c='\341\276\276' # U+1FBE
+ ;;
+ 21)
+ a='\316\251' # U+03A9
+ b='\317\211' # U+03C9
+ c='\342\204\246' # U+2126
+ ;;
+ 22)
+ a='\113' # U+004B
+ b='\153' # U+006B
+ c='\342\204\252' # U+212A
+ ;;
+ 23)
+ a='\303\205' # U+00C5
+ b='\303\245' # U+00E5
+ c='\342\204\253' # U+212B
+ ;;
+ 24)
+ a='\316\243' # U+03A3
+ b='\317\203' # U+03C3
+ c='\317\262' # U+03F2
+ ;;
+ esac
+
+ printf "$a\\n$b\\n$c\\n" >in || framework_failure_
+ for pattern in "$a" "$b" "$c"; do
+ pat=$(printf "$pattern\\n") || framework_failure_
+ grep -i "\\(\\)\\1$pat" in >out-regex || fail=1
+ grep -i "$pat" in >out-dfa || fail=1
+ compare_ out-regex out-dfa || fail=1
+ grep -iF "$pat" in >out-fixed || fail=1
+ compare_ out-regex out-fixed || fail=1
+ done
+done
+
+# Try a unibyte test with ISO 8859-7, if available.
+if test "$(get-mb-cur-max el_GR.iso88597)" -eq 1; then
+ LC_ALL=el_GR.iso88597
+ export LC_ALL
+
+ a='\323' # SIGMA
+ b='\362' # stigma
+ c='\363' # sigma
+
+ printf "$a\\n$b\\n$c\\n" >in || framework_failure_
+ for pattern in "$a" "$b" "$c"; do
+ pat=$(printf "$pattern\\n") || framework_failure_
+ grep -i "\\(\\)\\1$pat" in >out-regex || fail=1
+ grep -i "$pat" in >out-dfa || fail=1
+ compare_ out-regex out-dfa || fail=1
+ grep -iF "$pat" in >out-fixed || fail=1
+ compare_ out-regex out-fixed || fail=1
+ done
+fi
+
+Exit $fail