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-rw-r--r--src/nvim/testdir/test_eval_stuff.vim29
1 files changed, 29 insertions, 0 deletions
diff --git a/src/nvim/testdir/test_eval_stuff.vim b/src/nvim/testdir/test_eval_stuff.vim
index 1850fb0cf1..19a15590e5 100644
--- a/src/nvim/testdir/test_eval_stuff.vim
+++ b/src/nvim/testdir/test_eval_stuff.vim
@@ -49,3 +49,32 @@ func Test_line_continuation()
"\ and some more
call assert_equal([5, 6], array)
endfunc
+
+func Test_string_concatenation()
+ call assert_equal('ab', 'a'.'b')
+ call assert_equal('ab', 'a' .'b')
+ call assert_equal('ab', 'a'. 'b')
+ call assert_equal('ab', 'a' . 'b')
+
+ call assert_equal('ab', 'a'..'b')
+ call assert_equal('ab', 'a' ..'b')
+ call assert_equal('ab', 'a'.. 'b')
+ call assert_equal('ab', 'a' .. 'b')
+
+ let a = 'a'
+ let b = 'b'
+ let a .= b
+ call assert_equal('ab', a)
+
+ let a = 'a'
+ let a.=b
+ call assert_equal('ab', a)
+
+ let a = 'a'
+ let a ..= b
+ call assert_equal('ab', a)
+
+ let a = 'a'
+ let a..=b
+ call assert_equal('ab', a)
+endfunc