[Checkins] [zopefoundation/Products.ZCatalog] 6d5fa3: Fix test for empty value

[Andreas Gabriel]

  Branch: refs/heads/notindexed_value_support
  Home:   https://github.com/zopefoundation/Products.ZCatalog
  Commit: 6d5fa3e8f94cd4a459ecee79be247285bc09dd29
      https://github.com/zopefoundation/Products.ZCatalog/commit/6d5fa3e8f94cd4a459ecee79be247285bc09dd29
  Author: Andreas Gabriel <gabriel at hrz.uni-marburg.de>
  Date:   2019-05-29 (Wed, 29 May 2019)

  Changed paths:
    M src/Products/PluginIndexes/tests/test_unindex.py

  Log Message:
  -----------
  Fix test for empty value