patch 8.1.2073: when editing a buffer 'colorcolumn' may not work
Problem: When editing a buffer 'colorcolumn' may not work.
Solution: Set the buffer before copying option values. Call
check_colorcolumn() after copying window options.
diff --git a/src/testdir/test_highlight.vim b/src/testdir/test_highlight.vim
index 7db33bf..9e1af97 100644
--- a/src/testdir/test_highlight.vim
+++ b/src/testdir/test_highlight.vim
@@ -618,6 +618,31 @@
call delete('Xtest_wincolor')
endfunc
+func Test_colorcolumn()
+ CheckScreendump
+
+ " check that setting 'colorcolumn' when entering a buffer works
+ let lines =<< trim END
+ split
+ edit X
+ call setline(1, ["1111111111","22222222222","3333333333"])
+ set nomodified
+ set colorcolumn=3,9
+ set number cursorline cursorlineopt=number
+ wincmd w
+ buf X
+ END
+ call writefile(lines, 'Xtest_colorcolumn')
+ let buf = RunVimInTerminal('-S Xtest_colorcolumn', {'rows': 10})
+ call term_sendkeys(buf, ":\<CR>")
+ call term_wait(buf)
+ call VerifyScreenDump(buf, 'Test_colorcolumn_1', {})
+
+ " clean up
+ call StopVimInTerminal(buf)
+ call delete('Xtest_colorcolumn')
+endfunc
+
" This test must come before the Test_cursorline test, as it appears this
" defines the Normal highlighting group anyway.
func Test_1_highlight_Normalgroup_exists()