-require 'test_helper'
+require "test_helper"
class ShortLinkTest < ActiveSupport::TestCase
##
# tests that encoding and decoding are working to within
# the acceptable quantisation range.
def test_encode_decode
- cases = Array.new
+ cases = []
1000.times do
- cases << [ 180.0 * rand - 90.0, 360.0 * rand - 180.0, (18 * rand).to_i ]
+ cases << [(180.0 * rand) - 90.0, (360.0 * rand) - 180.0, (18 * rand).to_i]
end
cases.each do |lat, lon, zoom|
# one pixel (i.e: zoom + 8). the sqrt(5) is because each position
# has an extra bit of accuracy in the lat coordinate, due to the
# smaller range.
- distance = Math.sqrt((lat - lat2) ** 2 + (lon - lon2) ** 2)
+ distance = Math.sqrt(((lat - lat2)**2) + ((lon - lon2)**2))
max_distance = 360.0 / (1 << (zoom + 8)) * 0.5 * Math.sqrt(5)
assert max_distance > distance, "Maximum expected error exceeded: #{max_distance} <= #{distance} for (#{lat}, #{lon}, #{zoom})."
end
cases.each do |new_code, old_code|
assert_equal ShortLink.decode(old_code), ShortLink.decode(new_code),
- "old (#{old_code}) and new (#{new_code}) should decode to the same location."
+ "old (#{old_code}) and new (#{new_code}) should decode to the same location."
end
end
end