Test 4: Validating duplicate detection...
Found 26 duplicate groups:
  - John Smith: 3 duplicate(s)
  - Jane Doe: 3 duplicate(s)
  - Peter Jones: 3 duplicate(s)
  - Robert Brown: 3 duplicate(s)
  - Susan White: 2 duplicate(s)
  - Emily Green: 3 duplicate(s)
  - David Black: 3 duplicate(s)
  - Nancy Blue: 3 duplicate(s)
  - Michael Gold: 3 duplicate(s)
  - Laura Silver: 3 duplicate(s)
  - Chris Coral: 3 duplicate(s)
  - Amanda Amber: 3 duplicate(s)
  - Steven Stone: 3 duplicate(s)
  - Jessica Jade: 3 duplicate(s)
  - William Wood: 3 duplicate(s)
  - Patricia Pine: 3 duplicate(s)
  - Richard River: 3 duplicate(s)
  - Kimberly Cloud: 3 duplicate(s)
  - Jason Sky: 3 duplicate(s)
  - Michelle Moon: 3 duplicate(s)
  - Thomas Sun: 3 duplicate(s)
  - Cynthia Star: 3 duplicate(s)
  - Mark Wind: 3 duplicate(s)
  - Sarah Rain: 3 duplicate(s)
  - Duplicate Test: 0 duplicate(s)
  - Another One: 0 duplicate(s)
WARNING: 'John Smith' has 3 duplicates, expected 2
ERROR: Expected duplicate group for 'Sarah Johnson' not found
ERROR: Expected duplicate group for 'Michael Brown' not found
ERROR: Expected duplicate group for 'Jennifer Davis' not found
ERROR: Expected duplicate group for 'Robert Wilson' not found
ERROR: Expected duplicate group for 'Lisa Anderson' not found

ERROR: Missing 5 expected duplicate groups