old_contents: #https://www.openstreetmap.org/node/2389658224
  # Upper Yosemite Falls, because it's so tall at 550 meters, more than 300 meters
  assert_has_feature(
      12, 687, 1583, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 12 })
  
  #https://www.openstreetmap.org/node/2384221575
  # Middle Yosemite Falls, 206 meters, more than 50 meters
  assert_has_feature(
      13, 1374, 3166, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 13 })
  
  #https://www.openstreetmap.org/node/2389657981
  # Lower Yosemite Falls, only 98 meters
  assert_has_feature(
      13, 1374, 3167, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 13 })
  
  #https://www.openstreetmap.org/way/56539663
  # Niagara Falls (Horseshoe Falls)
  assert_has_feature(
      12, 1148, 1503, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 12 })
  
  # We had considered this for label_placement:yes, 
  # but there are only 19 in all of North America
  assert_no_matching_feature(
      12, 1148, 1503, 'water',
      { 'kind': 'waterfall' })
      
  #https://www.openstreetmap.org/node/2375445789
  # Alamere Falls (no height)
  # Assume falls are important, show at zoom 14 default
  assert_has_feature(
      14, 2604, 6322, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 14 })
      
  #http://www.openstreetmap.org/node/3257658773
  # Abrigo Falls, 4.5 meters (less than 8 meters)
  # Allow short waterfalls to be suppressed a zoom
  assert_has_feature(
      15, 5265, 12645, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 15 })
new_contents: #https://www.openstreetmap.org/node/2389658224
  # Upper Yosemite Falls, because it's so tall at 550 meters, more than 300 meters
  assert_has_feature(
      12, 687, 1583, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 12 })
  
  #https://www.openstreetmap.org/node/2384221575
  # Middle Yosemite Falls, 206 meters, more than 50 meters
  assert_has_feature(
      13, 1374, 3166, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 13 })
  
  #https://www.openstreetmap.org/node/2389657981
  # Lower Yosemite Falls, only 98 meters
  assert_has_feature(
      13, 1374, 3167, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 13 })
  
  #https://www.openstreetmap.org/way/56539663
  # Niagara Falls (Horseshoe Falls)
  assert_has_feature(
      12, 1148, 1503, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 12 })
  
  # We had considered this for label_placement:yes, 
  # but there are only 19 in all of North America
  assert_no_matching_feature(
      12, 1148, 1503, 'water',
      { 'kind': 'waterfall' })
      
  #https://www.openstreetmap.org/node/2375445789
  # Alamere Falls (no height)
  # Assume falls are important, show at zoom 14 default
  assert_has_feature(
      14, 2604, 6322, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 14 })
      
  #http://www.openstreetmap.org/node/3257658773
  # Abrigo Falls, 4.5 meters (less than 8 meters)
  # Allow short waterfalls to be suppressed a zoom
  assert_has_feature(
      15, 5265, 12645, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 15 })
  
  #http://www.openstreetmap.org/node/1247873121
  # Lower Chilnualna Fall, no height
  assert_has_feature(
      14, 2747, 6345, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 14 })
  
  #http://www.openstreetmap.org/node/1247873121
  # Chilnualna Creek Cascades, no height
  assert_has_feature(
      14, 2748, 6344, 'pois',
      { 'kind': 'waterfall', 'min_zoom': 14 })
subject: expand tests for natural=waterfall case