add boundary checks when facing north and moving forward.

3 files changed, 22 insertions, 0 deletions

diff --git a/spec/north_specs.rb b/spec/north_specs.rb
new file mode 100644
index 0000000..aeb1308
--- /dev/null
+++ b/spec/north_specs.rb
@@ -0,0 +1,20 @@
+require 'north'
+
+describe North do
+  before(:each) do
+    @sut = North.new
+  end
+  describe "when at the edge of the terrain" do
+    describe "when moving forward" do
+      it "should just stay at the current position" do
+        @location[:y].must_equal 3
+      end
+      before do
+        terrain = fake
+        terrain.stub(:is_out_of_bounds).with({:x => 0, :y => 4}).and_return(true)
+        @location = {:x => 0, :y => 3}
+        @sut.forward(@location, terrain)
+      end
+    end
+  end
+end
diff --git a/spec/rover_specs.rb b/spec/rover_specs.rb
index 5e99495..52b45c3 100644
--- a/spec/rover_specs.rb
+++ b/spec/rover_specs.rb
@@ -28,6 +28,7 @@ describe Rover do
     end
     describe "when driving forward" do
       before do
+        @terrain = fake
         @sut.move_forward(@terrain)
       end
       it "should increment the y coordinate on the terrain" do
diff --git a/spec/ts_all.rb b/spec/ts_all.rb
index 9bf43ab..b783a1e 100644
--- a/spec/ts_all.rb
+++ b/spec/ts_all.rb
@@ -7,4 +7,5 @@ require "book_specs"
 require "library_specs"
 require "stack_specs"
 require "rover_specs"
+require "north_specs"
 require "specifications/find_all_books_by_author_specs"