vim-patch:6a598be test for 7.4.487

https://code.google.com/p/vim/source/detail?r=6a598be6d4e8

test/functional/legacy/signs_spec.lua

@@ -0,0 +1,24 @@
+-- Tests for signs
+
+local helpers = require('test.functional.helpers')
+local feed, insert, source = helpers.feed, helpers.insert, helpers.source
+local clear, execute, expect = helpers.clear, helpers.execute, helpers.expect
+
+describe('signs', function()
+  setup(clear)
+
+  it('is working', function()
+    execute('sign define JumpSign text=x')
+    execute([[exe 'sign place 42 line=2 name=JumpSign buffer=' . bufnr('')]])
+    -- Split the window to the bottom to verify :sign-jump will stay in the current
+    -- window if the buffer is displayed there.
+    execute('bot split')
+    execute([[exe 'sign jump 42 buffer=' . bufnr('')]])
+    execute([[call append(line('$'), winnr())]])
+
+    -- Assert buffer contents.
+    expect([[
+      
+      2]])
+  end)
+end)