test(paste): add tests with virtualedit=onemore

1 files changed, 339 insertions, 328 deletions

diff --git a/test/functional/api/vim_spec.lua b/test/functional/api/vim_spec.lua
index 263add599c..f4a7d38d31 100644
--- a/test/functional/api/vim_spec.lua
+++ b/test/functional/api/vim_spec.lua
@@ -636,363 +636,374 @@ describe('API', function()
       eq('Invalid phase: 4',
         pcall_err(request, 'nvim_paste', 'foo', true, 4))
     end)
-    it('stream: multiple chunks form one undo-block', function()
-      nvim('paste', '1/chunk 1 (start)\n', true, 1)
-      nvim('paste', '1/chunk 2 (end)\n', true, 3)
-      local expected1 = [[
-        1/chunk 1 (start)
-        1/chunk 2 (end)
-        ]]
-      expect(expected1)
-      nvim('paste', '2/chunk 1 (start)\n', true, 1)
-      nvim('paste', '2/chunk 2\n', true, 2)
-      expect([[
-        1/chunk 1 (start)
-        1/chunk 2 (end)
-        2/chunk 1 (start)
-        2/chunk 2
-        ]])
-      nvim('paste', '2/chunk 3\n', true, 2)
-      nvim('paste', '2/chunk 4 (end)\n', true, 3)
-      expect([[
-        1/chunk 1 (start)
-        1/chunk 2 (end)
-        2/chunk 1 (start)
-        2/chunk 2
-        2/chunk 3
-        2/chunk 4 (end)
-        ]])
-      feed('u')  -- Undo.
-      expect(expected1)
-    end)
-    it('stream: Insert mode', function()
-      -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-      feed('afoo<Esc>u')
-      feed('i')
-      nvim('paste', 'aaaaaa', false, 1)
-      nvim('paste', 'bbbbbb', false, 2)
-      nvim('paste', 'cccccc', false, 2)
-      nvim('paste', 'dddddd', false, 3)
-      expect('aaaaaabbbbbbccccccdddddd')
-      feed('<Esc>u')
-      expect('')
-    end)
-    describe('stream: Normal mode', function()
-      describe('on empty line', function()
-        before_each(function()
-          -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-          feed('afoo<Esc>u')
-        end)
-        after_each(function()
-          feed('u')
-          expect('')
-        end)
-        it('pasting one line', function()
-          nvim('paste', 'aaaaaa', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('aaaaaabbbbbbccccccdddddd')
-        end)
-        it('pasting multiple lines', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-          aaaaaa
-          bbbbbb
-          cccccc
-          dddddd]])
-        end)
+    local function run_streamed_paste_tests()
+      it('stream: multiple chunks form one undo-block', function()
+        nvim('paste', '1/chunk 1 (start)\n', true, 1)
+        nvim('paste', '1/chunk 2 (end)\n', true, 3)
+        local expected1 = [[
+          1/chunk 1 (start)
+          1/chunk 2 (end)
+          ]]
+        expect(expected1)
+        nvim('paste', '2/chunk 1 (start)\n', true, 1)
+        nvim('paste', '2/chunk 2\n', true, 2)
+        expect([[
+          1/chunk 1 (start)
+          1/chunk 2 (end)
+          2/chunk 1 (start)
+          2/chunk 2
+          ]])
+        nvim('paste', '2/chunk 3\n', true, 2)
+        nvim('paste', '2/chunk 4 (end)\n', true, 3)
+        expect([[
+          1/chunk 1 (start)
+          1/chunk 2 (end)
+          2/chunk 1 (start)
+          2/chunk 2
+          2/chunk 3
+          2/chunk 4 (end)
+          ]])
+        feed('u')  -- Undo.
+        expect(expected1)
       end)
-      describe('not at the end of a line', function()
-        before_each(function()
-          feed('i||<Esc>')
-          -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-          feed('afoo<Esc>u')
-          feed('0')
-        end)
-        after_each(function()
-          feed('u')
-          expect('||')
-        end)
-        it('pasting one line', function()
-          nvim('paste', 'aaaaaa', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('|aaaaaabbbbbbccccccdddddd|')
-        end)
-        it('pasting multiple lines', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-          |aaaaaa
-          bbbbbb
-          cccccc
-          dddddd|]])
-        end)
+      it('stream: Insert mode', function()
+        -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+        feed('afoo<Esc>u')
+        feed('i')
+        nvim('paste', 'aaaaaa', false, 1)
+        nvim('paste', 'bbbbbb', false, 2)
+        nvim('paste', 'cccccc', false, 2)
+        nvim('paste', 'dddddd', false, 3)
+        expect('aaaaaabbbbbbccccccdddddd')
+        feed('<Esc>u')
+        expect('')
       end)
-      describe('at the end of a line', function()
-        before_each(function()
-          feed('i||<Esc>')
-          -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-          feed('afoo<Esc>u')
-          feed('$')
-        end)
-        after_each(function()
-          feed('u')
-          expect('||')
-        end)
-        it('pasting one line', function()
-          nvim('paste', 'aaaaaa', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('||aaaaaabbbbbbccccccdddddd')
-        end)
-        it('pasting multiple lines', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-            ||aaaaaa
+      describe('stream: Normal mode', function()
+        describe('on empty line', function()
+          before_each(function()
+            -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+            feed('afoo<Esc>u')
+          end)
+          after_each(function()
+            feed('u')
+            expect('')
+          end)
+          it('pasting one line', function()
+            nvim('paste', 'aaaaaa', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('aaaaaabbbbbbccccccdddddd')
+          end)
+          it('pasting multiple lines', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+            aaaaaa
             bbbbbb
             cccccc
             dddddd]])
+          end)
         end)
-      end)
-    end)
-    describe('stream: Visual mode', function()
-      describe('neither end at the end of a line', function()
-        before_each(function()
-          feed('i|xxx<CR>xxx|<Esc>')
-          -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-          feed('afoo<Esc>u')
-          feed('hvhk')
-        end)
-        after_each(function()
-          feed('u')
-          expect([[
-          |xxx
-          xxx|]])
-        end)
-        it('with non-empty chunks', function()
-          nvim('paste', 'aaaaaa', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('|aaaaaabbbbbbccccccdddddd|')
-        end)
-        it('with empty first chunk', function()
-          nvim('paste', '', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('|bbbbbbccccccdddddd|')
+        describe('not at the end of a line', function()
+          before_each(function()
+            feed('i||<Esc>')
+            -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+            feed('afoo<Esc>u')
+            feed('0')
+          end)
+          after_each(function()
+            feed('u')
+            expect('||')
+          end)
+          it('pasting one line', function()
+            nvim('paste', 'aaaaaa', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('|aaaaaabbbbbbccccccdddddd|')
+          end)
+          it('pasting multiple lines', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+            |aaaaaa
+            bbbbbb
+            cccccc
+            dddddd|]])
+          end)
         end)
-        it('with all chunks empty', function()
-          nvim('paste', '', false, 1)
-          nvim('paste', '', false, 2)
-          nvim('paste', '', false, 2)
-          nvim('paste', '', false, 3)
-          expect('||')
+        describe('at the end of a line', function()
+          before_each(function()
+            feed('i||<Esc>')
+            -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+            feed('afoo<Esc>u')
+            feed('2|')
+          end)
+          after_each(function()
+            feed('u')
+            expect('||')
+          end)
+          it('pasting one line', function()
+            nvim('paste', 'aaaaaa', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('||aaaaaabbbbbbccccccdddddd')
+          end)
+          it('pasting multiple lines', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+              ||aaaaaa
+              bbbbbb
+              cccccc
+              dddddd]])
+          end)
         end)
       end)
-      describe('cursor at the end of a line', function()
-        before_each(function()
-          feed('i||xxx<CR>xxx<Esc>')
-          -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-          feed('afoo<Esc>u')
-          feed('vko')
-        end)
-        after_each(function()
-          feed('u')
-          expect([[
-            ||xxx
-            xxx]])
+      describe('stream: Visual mode', function()
+        describe('neither end at the end of a line', function()
+          before_each(function()
+            feed('i|xxx<CR>xxx|<Esc>')
+            -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+            feed('afoo<Esc>u')
+            feed('3|vhk')
+          end)
+          after_each(function()
+            feed('u')
+            expect([[
+            |xxx
+            xxx|]])
+          end)
+          it('with non-empty chunks', function()
+            nvim('paste', 'aaaaaa', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('|aaaaaabbbbbbccccccdddddd|')
+          end)
+          it('with empty first chunk', function()
+            nvim('paste', '', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('|bbbbbbccccccdddddd|')
+          end)
+          it('with all chunks empty', function()
+            nvim('paste', '', false, 1)
+            nvim('paste', '', false, 2)
+            nvim('paste', '', false, 2)
+            nvim('paste', '', false, 3)
+            expect('||')
+          end)
         end)
-        it('with non-empty chunks', function()
-          nvim('paste', 'aaaaaa', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('||aaaaaabbbbbbccccccdddddd')
+        describe('cursor at the end of a line', function()
+          before_each(function()
+            feed('i||xxx<CR>xxx<Esc>')
+            -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+            feed('afoo<Esc>u')
+            feed('3|vko')
+          end)
+          after_each(function()
+            feed('u')
+            expect([[
+              ||xxx
+              xxx]])
+          end)
+          it('with non-empty chunks', function()
+            nvim('paste', 'aaaaaa', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('||aaaaaabbbbbbccccccdddddd')
+          end)
+          it('with empty first chunk', function()
+            nvim('paste', '', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('||bbbbbbccccccdddddd')
+          end)
         end)
-        it('with empty first chunk', function()
-          nvim('paste', '', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('||bbbbbbccccccdddddd')
+        describe('other end at the end of a line', function()
+          before_each(function()
+            feed('i||xxx<CR>xxx<Esc>')
+            -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
+            feed('afoo<Esc>u')
+            feed('3|vk')
+          end)
+          after_each(function()
+            feed('u')
+            expect([[
+              ||xxx
+              xxx]])
+          end)
+          it('with non-empty chunks', function()
+            nvim('paste', 'aaaaaa', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('||aaaaaabbbbbbccccccdddddd')
+          end)
+          it('with empty first chunk', function()
+            nvim('paste', '', false, 1)
+            nvim('paste', 'bbbbbb', false, 2)
+            nvim('paste', 'cccccc', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect('||bbbbbbccccccdddddd')
+          end)
         end)
       end)
-      describe('other end at the end of a line', function()
+      describe('stream: linewise Visual mode', function()
         before_each(function()
-          feed('i||xxx<CR>xxx<Esc>')
+          feed('i123456789<CR>987654321<CR>123456789<Esc>')
           -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
           feed('afoo<Esc>u')
-          feed('vk')
         end)
         after_each(function()
           feed('u')
           expect([[
-            ||xxx
-            xxx]])
-        end)
-        it('with non-empty chunks', function()
-          nvim('paste', 'aaaaaa', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('||aaaaaabbbbbbccccccdddddd')
-        end)
-        it('with empty first chunk', function()
-          nvim('paste', '', false, 1)
-          nvim('paste', 'bbbbbb', false, 2)
-          nvim('paste', 'cccccc', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect('||bbbbbbccccccdddddd')
-        end)
-      end)
-    end)
-    describe('stream: linewise Visual mode', function()
-      before_each(function()
-        feed('i123456789<CR>987654321<CR>123456789<Esc>')
-        -- If nvim_paste() calls :undojoin without making any changes, this makes it an error.
-        feed('afoo<Esc>u')
-      end)
-      after_each(function()
-        feed('u')
-        expect([[
-          123456789
-          987654321
-          123456789]])
-      end)
-      describe('selecting the start of a file', function()
-        before_each(function()
-          feed('ggV')
-        end)
-        it('pasting text without final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd987654321
-            123456789]])
-        end)
-        it('pasting text with final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd\n', false, 3)
-          expect([[
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd
+            123456789
             987654321
             123456789]])
         end)
-      end)
-      describe('selecting the middle of a file', function()
-        before_each(function()
-          feed('2ggV')
+        describe('selecting the start of a file', function()
+          before_each(function()
+            feed('ggV')
+          end)
+          it('pasting text without final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd987654321
+              123456789]])
+          end)
+          it('pasting text with final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd\n', false, 3)
+            expect([[
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd
+              987654321
+              123456789]])
+          end)
         end)
-        it('pasting text without final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-            123456789
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd123456789]])
+        describe('selecting the middle of a file', function()
+          before_each(function()
+            feed('2ggV')
+          end)
+          it('pasting text without final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+              123456789
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd123456789]])
+          end)
+          it('pasting text with final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd\n', false, 3)
+            expect([[
+              123456789
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd
+              123456789]])
+          end)
         end)
-        it('pasting text with final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd\n', false, 3)
-          expect([[
-            123456789
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd
-            123456789]])
+        describe('selecting the end of a file', function()
+          before_each(function()
+            feed('3ggV')
+          end)
+          it('pasting text without final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+              123456789
+              987654321
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd]])
+          end)
+          it('pasting text with final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd\n', false, 3)
+            expect([[
+              123456789
+              987654321
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd
+              ]])
+          end)
         end)
-      end)
-      describe('selecting the end of a file', function()
-        before_each(function()
-          feed('3ggV')
-        end)
-        it('pasting text without final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-            123456789
-            987654321
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd]])
-        end)
-        it('pasting text with final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd\n', false, 3)
-          expect([[
-            123456789
-            987654321
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd
-            ]])
+        describe('selecting the whole file', function()
+          before_each(function()
+            feed('ggVG')
+          end)
+          it('pasting text without final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd', false, 3)
+            expect([[
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd]])
+          end)
+          it('pasting text with final new line', function()
+            nvim('paste', 'aaaaaa\n', false, 1)
+            nvim('paste', 'bbbbbb\n', false, 2)
+            nvim('paste', 'cccccc\n', false, 2)
+            nvim('paste', 'dddddd\n', false, 3)
+            expect([[
+              aaaaaa
+              bbbbbb
+              cccccc
+              dddddd
+              ]])
+          end)
         end)
       end)
-      describe('selecting the whole file', function()
-        before_each(function()
-          feed('ggVG')
-        end)
-        it('pasting text without final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd', false, 3)
-          expect([[
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd]])
-        end)
-        it('pasting text with final new line', function()
-          nvim('paste', 'aaaaaa\n', false, 1)
-          nvim('paste', 'bbbbbb\n', false, 2)
-          nvim('paste', 'cccccc\n', false, 2)
-          nvim('paste', 'dddddd\n', false, 3)
-          expect([[
-            aaaaaa
-            bbbbbb
-            cccccc
-            dddddd
-            ]])
-        end)
+    end
+    describe('without virtualedit,', function()
+      run_streamed_paste_tests()
+    end)
+    describe('with virtualedit=onemore,', function()
+      before_each(function()
+        command('set virtualedit=onemore')
       end)
+      run_streamed_paste_tests()
     end)
     it('non-streaming', function()
       -- With final "\n".