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require 'rover'
describe Rover do
def create_sut(heading, x = 0, y = 0)
Rover.new heading,{ :x =>x,:y => y }
end
describe "when facing north" do
before do
@sut = create_sut :north, 0, 0
end
describe "when turning right" do
it "should face east" do
@sut.turn_right
@sut.heading.must_equal :east
end
end
describe "when turning left" do
it "should face west" do
@sut.turn_left
@sut.heading.must_equal :west
end
end
describe "when driving forward" do
before do
@sut.move_forward(@terrain)
end
it "should increment the y coordinate on the terrain" do
@sut.location.must_equal({:x => 0, :y => 1})
end
end
end
describe "when facing south" do
before do
@sut = create_sut :south, 0, 3
end
describe "when turning right" do
it "should face west" do
@sut.turn_right
@sut.heading.must_equal :west
end
end
describe "when turning left" do
it "should face east" do
@sut.turn_left
@sut.heading.must_equal :east
end
end
describe "when driving forward" do
before do
@sut.move_forward(@terrain)
end
it "should decrement the y coordinate on the terrain" do
@sut.location.must_equal({:x => 0, :y => 2})
end
end
end
describe "when facing east" do
before do
@sut = create_sut :east
end
describe "when turning right" do
it "should face south" do
@sut.turn_right
@sut.heading.must_equal :south
end
end
describe "when turning left" do
it "should face north" do
@sut.turn_left
@sut.heading.must_equal :north
end
end
describe "when driving forward" do
before do
@sut.move_forward(@terrain)
end
it "should increment the x coordinate on the terrain" do
@sut.location.must_equal({:x => 1, :y => 0})
end
end
end
describe "when facing west" do
before do
@sut = create_sut :west, 1, 0
end
describe "when turning right" do
it "should face north" do
@sut.turn_right
@sut.heading.must_equal :north
end
end
describe "when turning left" do
it "should face south" do
@sut.turn_left
@sut.heading.must_equal :south
end
end
describe "when driving forward" do
before do
@sut.move_forward(@terrain)
end
it "should decrement the x coordinate on the terrain" do
@sut.location.must_equal({:x => 0, :y => 0})
end
end
end
end
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