got = strings.ReplaceAll(got, veryLong, "long")
			want = strings.ReplaceAll(want, veryLong, "long")
			t.Errorf("addExtendedPrefix(%#q) = %#q; want %#q", in, got, want)
		}
	}
}

func TestMkdirAllLongPath(t *testing.T) {
	t.Parallel()

	tmpDir := t.TempDir()
	path := tmpDir
	for i := 0; i < 100; i++ {
		path += `\another-path-component`
	}
	if err := os.MkdirAll(path, 0777); err != nil {