test/geometry/point.rb in geometry-5 vs test/geometry/point.rb in geometry-6

@@ -9,10 +9,16 @@
 	    point.must_be_same_as original_point
 	    point.size.must_equal 2
 	    point.x.must_equal 3
 	    point.y.must_equal 4
 	end
+
+	it "must return the PointZero when constructed from a PointZero" do
+	    original_point = Geometry::PointZero.new
+	    point = Geometry::Point[original_point]
+	    point.must_be_same_as original_point
+	end
     end
 
     it "create a Point object using list syntax" do
 	point = Geometry::Point[2,1]
 	assert_equal(2, point.size)
@@ -100,18 +106,15 @@
 
 	    it "must return a Point when adding an array to a Point" do
 		(left + [5,6]).must_equal Point[6,8]
 	    end
 
-	    it "must raise TypeError when adding a scalar to a Point of dimension greater than 1" do
-		lambda { left + 1 }.must_raise Geometry::DimensionMismatch
+	    it "must add a Numeric to all elements" do
+		(left + 2).must_equal Point[3,4]
+		(2 + left).must_equal Point[3,4]
 	    end
 
-	    it "must support adding a Numeric to a Point with a size of 1" do
-		(Point[1] + 2).must_equal Point[3]
-	    end
-
 	    it "must raise an exception when adding mismatched sizes" do
 		lambda { left + [1,2,3,4] }.must_raise Geometry::DimensionMismatch
 	    end
 
 	    it "must return a Point when adding a Vector" do
@@ -128,15 +131,12 @@
 
 	    it "must return a Point when subtracting an array from a Point" do
 		(left - [5,6]).must_equal Point[-4, -4]
 	    end
 
-	    it "must raise an exception when subtracting a scalar from a Vector" do
-		lambda { left - 1 }.must_raise Geometry::DimensionMismatch
-	    end
-
-	    it "must subtract a Numeric from a Point of size 1" do
-		(Point[3] - 2).must_equal Point[1]
+	    it "must subtract a Numeric from all elements" do
+		(left - 2).must_equal Point[-1, 0]
+		(2 - left).must_equal Point[1,0]
 	    end
 
 	    it "must raise an exception when subtracting mismatched sizes" do
 		lambda { left - [1,2,3,4] }.must_raise Geometry::DimensionMismatch
 	    end