require 'spec_helper'

describe Shoes::Swt::Color do
  subject(:color)  { Shoes::Swt::Color.create(Shoes::COLORS[:salmon]) }
  let(:applied_to) { double("applied to") }

  it_behaves_like "an swt pattern"

  its(:class) { is_expected.to eq(Shoes::Swt::Color) }

  describe "underlying SWT object" do
    let(:real) { color.real }

    it "is a native SWT color" do
      expect(real.class).to eq(::Swt::Graphics::Color)
    end

    it "has same red value as Shoes color" do
      expect(real.red).to eq(250)
    end

    it "has same green value as Shoes color" do
      expect(real.green).to eq(128)
    end

    it "has same blue value as Shoes color" do
      expect(real.blue).to eq(114)
    end
  end

  describe "#apply_as_fill" do
    let(:gc) { double("gc") }

    it "sets background" do
      allow(gc).to receive(:set_alpha)
      expect(gc).to receive(:set_background).with(color.real)
      color.apply_as_fill(gc, applied_to)
    end

    it "sets alpha" do
      allow(gc).to receive(:set_background)
      expect(gc).to receive(:set_alpha)
      color.apply_as_fill(gc, applied_to)
    end
  end
end

describe Shoes::Swt::NullColor do
  subject(:color)  { Shoes::Swt::Color.create(nil) }
  let(:applied_to) { double("applied to") }

  it { is_expected.to be_instance_of(Shoes::Swt::NullColor) }
  its(:real) { is_expected.to be_nil }
  its(:dsl) { is_expected.to be_nil }
  its(:alpha) { is_expected.to be_nil }

  describe "pattern interface" do
    let(:gc) { double("graphics context") }

    it "sends no messages in #apply_as_fill" do
      color.apply_as_fill(gc, applied_to)
    end

    it "sends no messages in #apply_as_stroke" do
      color.apply_as_stroke(gc, applied_to)
    end
  end
end