subject {page}
describe "sign in page" do
  before { visit signin_path}
  it { should have_title("Sign in")}
  it { should have_content("Sign in")}

  describe "with invalid information" do
    before { click_button "Sign in" }

    it { should have_title 'Sign in' }
    it { should have_error_message("Invalid")}

    describe "after visiting another page" do
      before { click_link "Home" }

      it { should_not have_error_message("Invalid")}
    end
  end
end