test/unit/graticule/location_test.rb in graticule-0.1.1 vs test/unit/graticule/location_test.rb in graticule-0.1.2

@@ -32,7 +32,20 @@
         assert_not_equal Location.new, Location.new(k => v)
         assert_not_equal Location.new(attrs), Location.new(attrs.update(k => nil))
       end
     end
     
+    def test_antipode
+      washington_dc = Location.new(:latitude => 38.898748, :longitude => -77.037684)
+      chicago = Location.new(:latitude => 41.85, :longitude => -87.65)
+      
+      assert_equal [-38.898748, 102.962316], washington_dc.antipode.coordinates
+      assert_equal [-41.85, 92.35], chicago.antipode.coordinates
+      assert_equal [-41, -180], Graticule::Location.new(:latitude => 41, :longitude => 0).antipode.coordinates
+      assert_equal [-41, 179], Graticule::Location.new(:latitude => 41, :longitude => -1).antipode.coordinates
+      assert_equal [-41, -179], Graticule::Location.new(:latitude => 41, :longitude => 1).antipode.coordinates
+      
+      assert_equal washington_dc.coordinates, washington_dc.antipode.antipode.coordinates
+      assert_equal chicago.coordinates, chicago.antipode.antipode.coordinates
+    end
   end
 end
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