pipeline_spec.rb

require 'rails_helper'

include Pipeline

RSpec.describe Pipeline, :type => :model do
  context "#pipe" do
    context "receiving scope, an initial value and a block" do
      it "should work have his own inspect defined" do
        result = pipe self, 1 do
          inspect
        end
        result.should == "1"
      end

      it "should chain methods passing a result value from a method as the
      first argument of the next one" do
        def sum(a, b)
          a + b
        end
        result = pipe self, 1 do
          sum(2)
        end
        result.should == 3
      end

      it "should chain any methods" do
        def concatenate(a, b)
          a + b
        end
        result = pipe self, "Hey" do
          concatenate(" you!")
          concatenate(" Can you hear me?")
        end
        result.should == ("Hey you! Can you hear me?")
      end

      it "should work with external modules encapsuled" do
        def sin(number)
          Math.sin(number)
        end
        result = pipe self, 0.0 do
          sin
        end
        result.should == (0.0)
      end

      it "should work with external encapsuled on lambda" do
        result = pipe self, 0.0 do
          external -> (entry_value, &b) {Math.cos entry_value}
        end
        result.should == (1.0)
      end
    end
  end
end