require 'minitest/autorun'
require 'geometry/square'

describe Geometry::Square do
    Square = Geometry::Square

    describe "when constructed" do
	it "must create a Square from two Points" do
	    square = Square.new from:[1,2], to:[3,4]
	    square.must_be_kind_of Geometry::Square
	end
	
	it "must reorder swapped points when constructed from two Points" do
	    square = Geometry::Square.new from:[3,4], to:[1,2]
	    square.must_be_kind_of Geometry::Square
	    square.instance_eval('@points[0]').must_equal Point[1,2]
	    square.instance_eval('@points[1]').must_equal Point[3,4]
	end

	it "must accept an origin Point and a size" do
	    square = Square.new origin:[1,2], size:5
	    square.must_be_kind_of Geometry::SizedSquare
	    square.origin.must_equal Point[1,2]
	    square.height.must_equal 5
	    square.width.must_equal 5
	end

	it 'must accept a center and a size' do
	    square = Square.new center:[1,2], size:5
	    square.must_be_kind_of Geometry::CenteredSquare
	    square.center.must_equal Point[1,2]
	    square.size.must_equal 5
	end

	it 'must work with only a size parameter' do
	    square = Square.new size:5
	    square.must_be_kind_of Geometry::CenteredSquare
	    square.center.must_equal Point[0,0]
	    square.size.must_equal 5
	end

	it 'must deal with a non-numeric size' do
	    square = Square.new size:[5,5]
	    square.must_be_kind_of Geometry::CenteredSquare
	    square.center.must_equal Point[0,0]
	    square.size.must_equal 5
	end

	it 'must accept a Size size' do
	    square = Square.new size:Size[5,5]
	    square.must_be_kind_of Geometry::CenteredSquare
	    square.center.must_equal Point[0,0]
	    square.size.must_equal 5
	end

	it 'must reject a size parameter that is not square' do
	    -> { Square.new size:[1,2] }.must_raise Geometry::NotSquareError
	end
    end
    
    describe "properties" do
	subject { Square.new from:[2,3], to:[3,4] }

	it 'must always be closed' do
	    subject.closed?.must_equal true
	end

	it "must have an origin accessor" do
	    subject.origin.must_equal Point[2,3]
	end

	it "must have a minmax property that returns the corners of the bounding rectangle" do
	    subject.minmax.must_equal [Point[2, 3], Point[3, 4]]
	end

	it "must have a max property that returns the upper right corner of the bounding rectangle" do
	    subject.max.must_equal Point[3, 4]
	end

	it "must have a min property that returns the lower left corner of the bounding rectangle" do
	    subject.min.must_equal Point[2, 3]
	end
    end
end

describe Geometry::CenteredSquare do
    describe "when constructed" do
	it "must create a CenteredSquare from a center point and a size" do
	    square = Geometry::CenteredSquare.new [2,3], 5
	    square.must_be_instance_of Geometry::CenteredSquare
	    square.must_be_kind_of Geometry::Square
	end
    end

    describe "properties" do
	let(:square) { Geometry::CenteredSquare.new [2,3], 4 }
	
	it "must have a center property" do
	    square.center.must_equal Point[2,3]
	end

	it "must have a points property" do
	    square.points.must_equal [Point[0,1], Point[4,1], Point[4,5], Point[0,5]]
	end

	it "must have a height property" do
	    square.height.must_equal 4
	end

	it "must have a width property" do
	    square.width.must_equal 4
	end

	it "must have a minmax property that returns the corners of the bounding rectangle" do
	    square.minmax.must_equal [Point[0, 1], Point[4, 5]]
	end

	it "must have a max property that returns the upper right corner of the bounding rectangle" do
	    square.max.must_equal Point[4, 5]
	end

	it "must have a min property that returns the lower left corner of the bounding rectangle" do
	    square.min.must_equal Point[0, 1]
	end
    end
end

describe Geometry::SizedSquare do
    describe "when constructed" do
	it "must create a SizedSquare from a point and a size" do
	    square = Geometry::SizedSquare.new [2,3], 5
	    square.must_be_instance_of Geometry::SizedSquare
	    square.must_be_kind_of Geometry::Square
	end
    end

    describe "properties" do
	let(:square) { Geometry::SizedSquare.new [2,3], 4 }

	it "must have a center property" do
	    square.center.must_equal Point[4,5]
	end

	it "must have a points property" do
	    square.points.must_equal [Point[2,3], Point[6,3], Point[6,7], Point[2,7]]
	end

	it "must have a height property" do
	    square.height.must_equal 4
	end

	it "must have a width property" do
	    square.width.must_equal 4
	end

	it "must have a minmax property that returns the corners of the bounding rectangle" do
	    square.minmax.must_equal [Point[2, 3], Point[6, 7]]
	end

	it "must have a max property that returns the upper right corner of the bounding rectangle" do
	    square.max.must_equal Point[6, 7]
	end

	it "must have a min property that returns the lower left corner of the bounding rectangle" do
	    square.min.must_equal Point[2, 3]
	end
    end
end