Testing yard_list.php logic...

Test 1: Fetching weight categories
✓ Found 8 weight categories

Test 2: Using PlantData::fetchAllSimple() for dumpers
✓ fetchAllSimple() succeeded. Got 5 rows
  First row: {"id_plant_list":2595,"fleet_number":"D107","display":"D107 - 6t Swivel"}

Test 3: Using PlantData::fetchExcavatorsByWeight()
✓ fetchExcavatorsByWeight() succeeded for '2t'
  Found 0 excavators

✓ All logic tests completed!