Testing yard_list.php queries...

Test 1: Fetching excavator weight categories
✓ Query succeeded. Found 8 weight categories

Test 2: Fetching dumper rows
✓ Query succeeded. Found 0 dumper rows

Test 3: Checking if required tables exist
✓ Table 'plant_list' exists
✓ Table 'hire_list' exists
✓ Table 'plant_specifications' exists

✓ All query tests completed!