require 'test_helper'

module Vedeu

  describe Viewport do

    let(:described) { Vedeu::Viewport }
    let(:instance)  { described.new(interface) }
    let(:interface) {
      Vedeu.interface 'lithium' do
        geometry do
          height 3
          width 3
        end
        lines do
          line 'barium'
          line 'carbon'
          line 'helium'
          line 'iodine'
          line 'nickel'
          line 'osmium'
        end
      end
    }

    describe '#initialize' do
      it { instance.must_be_instance_of(Viewport) }
      it { instance.instance_variable_get('@interface').must_equal(interface) }
    end

    describe '#render' do
      let(:cursor) { Cursor.new(cursor_attributes) }
      let(:cursor_attributes) {
        { name: 'lithium', ox: ox, oy: oy, state: true, x: x, y: y }
      }
      let(:lines)  { [] }
      let(:ox)     { 0 }
      let(:oy)     { 0 }
      let(:x)      { 1 }
      let(:y)      { 1 }

      before do
        interface.stubs(:cursor).returns(cursor)
      end

      subject { instance.render }

      it { subject.must_be_instance_of(Array) }

      context 'when there is no content' do
        before { interface.stubs(:lines).returns([]) }

        it { subject.must_equal([]) }
      end
    end

    # describe '#to_s' do
    #   let(:cursor) { Cursor.new(cursor_attributes) }
    #   let(:cursor_attributes) {
    #     { name: 'lithium', ox: ox, oy: oy, state: true, x: x, y: y }
    #   }
    #   let(:lines)  { [] }
    #   let(:ox)     { 0 }
    #   let(:oy)     { 0 }
    #   let(:x)      { 1 }
    #   let(:y)      { 1 }

    #   before do
    #     interface.stubs(:cursor).returns(cursor)
    #   end

    #   subject { instance.to_s }

    #   it { subject.must_be_instance_of(Array) }

    #   context 'when there is no content' do
    #     before { interface.stubs(:lines).returns([]) }

    #     it { subject.must_equal([]) }
    #   end

    #   context 'when there is content' do
    #     context "when the cursor's y position is outside the viewable area - negative" do
    #       let(:ox) { -4 }
    #       let(:oy) { -4 }

    #       it 'scrolls the content the correct position' do
    #         subject.must_equal("bar\ncar\nhel")
    #       end
    #     end

    #     context "when the cursor's y position is inside the viewable area" do
    #       context "when there is not enough content to fill the height" do
    #         let(:ox) { 3 }
    #         let(:oy) { 7 }

    #         it "renders the visible content" do
    #           subject.must_equal("nic\nosm\n")
    #         end
    #       end

    #       context "when there is more content than the height" do
    #         let(:ox) { 3 }
    #         let(:oy) { 3 }

    #         it "is cropped to show only that which fits" do
    #           subject.must_equal("bar\ncar\nhel")
    #         end
    #       end
    #     end

    #     context "when the cursor's x position is outside the viewable area" do
    #       context "but inside the content" do
    #         let(:ox) { 6 }
    #         let(:oy) { 6 }

    #         it 'scrolls the content the correct position' do
    #           subject.must_equal("ine\nkel\nium")
    #         end
    #       end

    #       context "and outside the content" do
    #         let(:ox) { 7 }
    #         let(:oy) { 7 }

    #         it "scrolls the content the correct position" do
    #           subject.must_equal("el\num\n")
    #         end
    #       end
    #     end

    #     context "when the cursor's x position is inside the viewable area" do
    #       context "when there is not enough content to fill the width" do
    #         let(:ox) { 7 }
    #         let(:oy) { 3 }

    #         it "renders the visible content" do
    #           subject.must_equal("um\non\num")
    #         end
    #       end

    #       context "when there is more content than the width" do
    #         let(:ox) { 3 }
    #         let(:oy) { 3 }

    #         it "is cropped to show only that which fits" do
    #           subject.must_equal("bar\ncar\nhel")
    #         end
    #       end
    #     end
    #   end
    # end

  end # Viewport

end # Vedeu