patch 8.1.1417: MS-Windows: resolve() does not resolve all components of path

Problem:    MS-Windows: resolve() does not resolve all components of the path.
            (David Briscoe)
Solution:   Do not bail out for a reparse point. (Yasuhiro Matsumoto,
            closes #4211, closes #4447)
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 3e4c03c..cc1ee8b 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -238,7 +238,7 @@
 func s:normalize_fname(fname)
   let ret = substitute(a:fname, '\', '/', 'g')
   let ret = substitute(ret, '//', '/', 'g')
-  let ret = tolower(ret)
+  return tolower(ret)
 endfunc
 
 func Test_resolve_win32()
@@ -330,6 +330,19 @@
     echomsg 'skipped test for buffer name'
   endif
   call delete('Xfile')
+
+  " test for reparse point
+  call mkdir('Xdir')
+  silent !mklink /D Xdirlink Xdir
+  if !v:shell_error
+    w Xdir/text.txt
+    call assert_equal(s:normalize_fname(getcwd() . '\Xdir\text.txt'), s:normalize_fname(resolve('Xdirlink\text.txt')))
+    call assert_equal(s:normalize_fname(getcwd() . '\Xdir'), s:normalize_fname(resolve('Xdirlink')))
+  else
+    echomsg 'skipped test for reparse point'
+  endif
+
+  call delete('Xdir', 'rf')
 endfunc
 
 func Test_simplify()