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# frozen_string_literal: true
require 'test/unit'
require 'geometry'
include Test::Unit::Assertions
include Geometry
ln1 = Line.new(Point.new(0.0, 0.0), Point.new(1.0, 2.0))
ln2 = Line.new(Point.new(1.0, 1.0), Point.new(2.0, 2.0))
assert_equal Geometry.gradient(ln1), 2
assert_equal Geometry.gradient(ln2), 1
assert_equal Geometry.intersection(ln1, ln2), Point.new(0, 0)
assert Geometry.intersection(ln1, ln1).nil?
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