require_relative "../port.rb"

describe Port do
  it "should set the port's value when we call setval" do
    a=Port.new
    a.setval(1)
    expect(a).to eq 1
  end
  it "should propagate values when we call setval" do
    a=Port.new
    b=Port.new
    c=Port.new
    d=Port.new

    #connect A-B and C-D
    a.connect(b)
    c.connect(d)

    a.setval(1)
    c.setval(2)
    expect(a).to eq 1
    expect(b).to eq 1
    expect(c).to eq 2
    expect(d).to eq 2

    #connect them all together
    b.connect(c)
    a.setval(3)
    expect(a).to eq 3
    expect(b).to eq 3
    expect(c).to eq 3
    expect(d).to eq 3
    d.setval(4)
    expect(a).to eq 4
    expect(b).to eq 4
    expect(c).to eq 4
    expect(d).to eq 4
  end
end