new_contents: from AlphaTwirl.Configure import EventReaderCollectorAssociatorBuilder
  import unittest
  
  ##__________________________________________________________________||
  class MockCounts: pass
  
  ##__________________________________________________________________||
  class MockWeight: pass
  
  ##__________________________________________________________________||
  class MockBinning: pass
  
  ##__________________________________________________________________||
  class TestEventReaderCollectorAssociatorBuilder(unittest.TestCase):
  
      def test_one(self):
          builder = EventReaderCollectorAssociatorBuilder()
          tblcfg = {
              'binnings': (MockBinning(),),
              'weight': MockWeight(),
              'outFileName': 'tbl_component_met_pt.txt',
              'branchNames': ('met_pt',),
              'countsClass': MockCounts,
              'outFilePath': '/tmp/tbl_component_met_pt.txt',
              'outFile': True,
              'outColumnNames': ('met_pt',),
              'indices': None
          }
  
          builder.build(tblcfg)
  
  ##__________________________________________________________________||
  
subject: add a new test case TestEventReaderCollectorAssociatorBuilder