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-rw-r--r--src/nvim/testdir/test_regexp_utf8.vim15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/nvim/testdir/test_regexp_utf8.vim b/src/nvim/testdir/test_regexp_utf8.vim
index 7f3b31575d..a2f4286d4f 100644
--- a/src/nvim/testdir/test_regexp_utf8.vim
+++ b/src/nvim/testdir/test_regexp_utf8.vim
@@ -98,6 +98,21 @@ func Test_recursive_substitute()
bwipe!
endfunc
+func Test_nested_backrefs()
+ " Check example in change.txt.
+ new
+ for re in range(0, 2)
+ exe 'set re=' . re
+ call setline(1, 'aa ab x')
+ 1s/\(\(a[a-d] \)*\)\(x\)/-\1- -\2- -\3-/
+ call assert_equal('-aa ab - -ab - -x-', getline(1))
+
+ call assert_equal('-aa ab - -ab - -x-', substitute('aa ab x', '\(\(a[a-d] \)*\)\(x\)', '-\1- -\2- -\3-', ''))
+ endfor
+ bwipe!
+ set re=0
+endfunc
+
func Test_eow_with_optional()
let expected = ['abc def', 'abc', 'def', '', '', '', '', '', '', '']
for re in range(0, 2)