patch 8.0.1771: in tests, when WaitFor() fails it doesn't say why
Problem: In tests, when WaitFor() fails it doesn't say why. (James McCoy)
Solution: Add WaitForAssert(), which produces an assert error when it fails.
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 1c34e30..19c54d1 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -1322,11 +1322,11 @@
let buf = term_start([GetVimProg(), '--clean', '-c', 'set noswapfile'], {'term_rows': 3})
call assert_equal('running', term_getstatus(buf))
" Wait for the ruler (in the status line) to be shown.
- call WaitFor({-> term_getline(buf, 3) =~# '\<All$'})
+ call WaitForAssert({-> assert_match('\<All$', term_getline(buf, 3))})
" It's only adding autocmd, so that no event occurs.
call term_sendkeys(buf, ":au! TextChanged <buffer> call writefile(['No'], 'Xchanged.txt')\<cr>")
call term_sendkeys(buf, "\<C-\\>\<C-N>:qa!\<cr>")
- call WaitFor({-> term_getstatus(buf) == 'finished'})
+ call WaitForAssert({-> assert_equal('finished', term_getstatus(buf))})
call assert_equal([''], readfile('Xchanged.txt'))
" clean up