[PATCH] tests: add another grep -i testcase, from bug 16179

[Paolo Bonzini]

* tests/case-fold-backref: New.
* tests/Makefile.am (TESTS): Add it.
---
 tests/Makefile.am       |    1 +
 tests/case-fold-backref |   14 ++++++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)
 create mode 100644 tests/case-fold-backref

diff --git a/tests/Makefile.am b/tests/Makefile.am
index e27d1d5..38b8db1 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -17,6 +17,7 @@
 TESTS =                                                \
   backref.sh                                   \
   bre.sh                                       \
+  case-fold-backref                            \
   case-fold-backslash-w                                \
   case-fold-char-class                         \
   case-fold-char-range                         \
diff --git a/tests/case-fold-backref b/tests/case-fold-backref
new file mode 100644
index 0000000..01a2f1f
--- /dev/null
+++ b/tests/case-fold-backref
@@ -0,0 +1,14 @@
+#!/bin/sh
+# This would fail for grep-2.5.3
+: ${srcdir=.}
+. "$srcdir/init.sh"; path_prepend_ ../src
+
+printf 'the the\nThe the\nTHE the\n'      > exp1 || framework_failure
+fail=0
+
+for LOC in en_US.UTF-8 en_US zh_CN $LOCALE_FR_UTF8 C; do
+  LC_ALL=$LOC grep -Ei '(the) \1' exp1 > out1 || fail=1
+  compare out1 exp1 || fail=1
+done
+
+Exit $fail
-- 
1.6.6.1