brew/Library/Homebrew/test/cmd/options_spec.rb

describe "brew options", :integration_test do
  it "prints a given Formula's options" do
    setup_test_formula "testball", <<~EOS
      depends_on "bar" => :recommended
    EOS

    expect { brew "options", "testball" }
      .to output("--with-foo\n\tBuild with foo\n--without-bar\n\tBuild without bar support\n\n").to_stdout
      .and not_to_output.to_stderr
      .and be_a_success
  end
end