Use isANode

Author: ccocchi

core/array/shared/slice.rb

@@ -744,20 +744,28 @@ def to.to_int() -2 end
         @array.send(@method, eval("(-2...-4).step(10)")).should == []
       end
 
-      it "foos" do
-        @array.send(@method, eval("(0..6).step(1)")).should == [0, 1, 2, 3, 4, 5]
-        -> { @array.send(@method, eval("(0..6).step(2)")) }.should raise_error(RangeError, /out of range/)
-
-        @array.send(@method, eval("(1..6).step(2)")).should == [1, 3, 5]
-        @array.send(@method, eval("(2..7).step(2)")).should == [2, 4]
-        -> { @array.send(@method, eval("(2..8).step(2)")) }.should raise_error(RangeError, /out of range/)
-
-        @array.send(@method, eval("(6..1).step(-2)")).should == [5, 3, 1]
-        @array.send(@method, eval("(7..2).step(-2)")).should == [5, 3]
-        -> { @array.send(@method, eval("(8..2).step(-2)")) }.should raise_error(RangeError, /out of range/)
+      it "has range with bounds outside of array" do
+        # end is equal to array's length
+        @array.send(@method, (0..6).step(1)).should == [0, 1, 2, 3, 4, 5]
+        -> { @array.send(@method, (0..6).step(2)) }.should raise_error(RangeError)
+
+        # end is greater than length with positive steps
+        @array.send(@method, (1..6).step(2)).should == [1, 3, 5]
+        @array.send(@method, (2..7).step(2)).should == [2, 4]
+        -> { @array.send(@method, (2..8).step(2)) }.should raise_error(RangeError)
+
+        # begin is greater than length with negative steps
+        @array.send(@method, (6..1).step(-2)).should == [5, 3, 1]
+        @array.send(@method, (7..2).step(-2)).should == [5, 3]
+        -> { @array.send(@method, (8..2).step(-2)) }.should raise_error(RangeError)
+      end
 
+      it "has endless range with start outside of array's bounds" do
         @array.send(@method, eval("(6..).step(1)")).should == []
         @array.send(@method, eval("(7..).step(1)")).should == nil
+
+        @array.send(@method, eval("(6..).step(2)")).should == []
+        -> { @array.send(@method, eval("(7..).step(2)")) }.should raise_error(RangeError)
       end
     end
   end