[go-nuts] fstest.MapFS ReadDir does not set name field for entry.Name()

[Kalen Krempely]

I am trying to use fstest.MapFS to help with testing, but I noticed the 
mapfs implementation of ReadDir 
<https://cs.opensource.google/go/go/+/refs/tags/go1.17:src/testing/fstest/mapfs.go;l=224-238;bpv=1;bpt=0>
 does 
not set the name field which is quite problematic as I rely on that in my 
code.

*Example Test Code:*
t.Run("some test", func(t *testing.T) {
   fs := fstest.MapFS{
      "/some/long/test/path_hi_there": {Mode: fs.ModeDir},
   }

   err := VerifyDir(fs, "/some/long/test/path_hi_there")
   if err != nil {
      fmt.Println("unexpected error %+v", err)
   }
})

*Snippet of Code:*
func VerifyDir(fsys fs.FS, dir string) error {
   entries, err := fs.ReadDir(fsys, ".")
   if err != nil {
      return err
   }

   for _, entry := range entries {
      if !entry.IsDir() {
         continue
      }
     
      fmt.Println("expected entry.Name() to not be empty:", entry.Name())
      path := filepath.Join(dir, entry.Name())
      // do stuff with path...
   }

   return nil
}

Any ideas around this? Any practical examples of using fstest.MapFS to 
learn from?

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