Merge #11632 from janlazo/vim-8.1.2087

vim-patch:8.1.2087,8.2.0058

src/nvim/testdir/runtest.vim

@@ -319,6 +319,12 @@ if argc() > 1
   let s:tests = filter(s:tests, 'v:val =~ argv(1)')
 endif
 
+" If the environment variable $TEST_FILTER is set then filter the function
+" names against it.
+if $TEST_FILTER != ''
+  let s:tests = filter(s:tests, 'v:val =~ $TEST_FILTER')
+endif
+
 " Execute the tests in alphabetical order.
 for s:test in sort(s:tests)
   " Silence, please!

src/nvim/testdir/summarize.vim

@@ -1,6 +1,7 @@
 if 1
   " This is executed only with the eval feature
   set nocompatible
+  set viminfo=
   func Count(match, type)
     if a:type ==# 'executed'
       let g:executed += (a:match+0)
@@ -8,7 +9,7 @@ if 1
       let g:failed += a:match+0
     elseif a:type ==# 'skipped'
       let g:skipped += 1
-      call extend(g:skipped_output, ["\t".a:match])
+      call extend(g:skipped_output, ["\t" .. a:match])
     endif
   endfunc
 
@@ -19,6 +20,10 @@ if 1
   let g:failed_output = []
   let output = [""]
 
+  if $TEST_FILTER != ''
+    call extend(g:skipped_output, ["\tAll tests not matching $TEST_FILTER: '" .. $TEST_FILTER .. "'"])
+  endif
+
   try
     " This uses the :s command to just fetch and process the output of the
     " tests, it doesn't actually replace anything.