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-rw-r--r--src/nvim/testdir/test_fileformat.vim23
1 files changed, 23 insertions, 0 deletions
diff --git a/src/nvim/testdir/test_fileformat.vim b/src/nvim/testdir/test_fileformat.vim
index 8dc25f62b1..3de7d38831 100644
--- a/src/nvim/testdir/test_fileformat.vim
+++ b/src/nvim/testdir/test_fileformat.vim
@@ -31,3 +31,26 @@ func Test_fileformat_autocommand()
au! BufReadPre Xfile
bw!
endfunc
+
+" Test for changing the fileformat using ++read
+func Test_fileformat_plusplus_read()
+ new
+ call setline(1, ['one', 'two', 'three'])
+ set ff=unix
+ w ++ff=dos Xfile1
+ enew!
+ " A :read doesn't change the fileformat, but does apply to the read lines.
+ r ++fileformat=unix Xfile1
+ call assert_equal('unix', &fileformat)
+ call assert_equal("three\r", getline('$'))
+ 3r ++edit Xfile1
+ call assert_equal('dos', &fileformat)
+ close!
+ call delete('Xfile1')
+ set fileformat&
+ call assert_fails('e ++fileformat Xfile1', 'E474:')
+ call assert_fails('e ++ff=abc Xfile1', 'E474:')
+ call assert_fails('e ++abc1 Xfile1', 'E474:')
+endfunc
+
+" vim: shiftwidth=2 sts=2 expandtab