active_interaction custom filter

active_interaction_custom_flter.rb

require "minitest/matchers"
require "minitest/autorun"
require "active_interaction"

module ActiveInteraction
  class Base     
  end

  class MixedFilter < Filter
    register :mixed

    def allow(&check)
      @check = check
    end

    private

    def matches?(value)
      @check.call(value)
    rescue NoMethodError
      false
    end
  end
end

class Square < ActiveInteraction::Base
  float :x
  mixed :y do
    allow do |v| 
      [Integer, String].any? { |t| v.is_a?(t) }
    end
  end

  def execute
    "#{x*2} - #{y}"
  end
end

describe Square do
  it "works" do
    outcome = Square.run(x: 2.5, y: "a")
    assert_equal outcome.result, "5.0 - a"
    assert_equal outcome.valid?, true

    outcome = Square.run(x: 2.5, y: 100)
    assert_equal outcome.result, "5.0 - 100"
    assert_equal outcome.valid?, true
  end
end