lib/terraformer/line_string.rb in terraformer-0.1.0 vs lib/terraformer/line_string.rb in terraformer-0.2.0

@@ -1,8 +1,18 @@
 module Terraformer
 
   class LineString < Geometry
 
+    def initialize *args
+      super *args
+
+      # must be an array of coordinates
+      unless Array === coordinates &&
+             Terraformer::Coordinate === coordinates[0]
+        raise ArgumentError.new 'invalid coordinates for Terraformer::LineString'
+      end
+    end
+
     def first_coordinate
       coordinates[0]
     end
 
     def linear_ring?