Contents

require "spec_helper"
require "hamster/immutable"

describe Hamster::Immutable do
  class Fixture
    include Hamster::Immutable

    def initialize(&block)
      @block = block
    end

    def call
      @block.call
    end
    memoize :call

    def copy
      transform {}
    end
  end

  let(:immutable) { Fixture.new { @count += 1 } }

  describe "#memoize" do

    before(:each) do
      @count = 0
      immutable.call
    end

    it "should still freezes be immutable" do
      expect(immutable).to be_immutable
    end

    context "when called multiple times" do
      before(:each) do
        immutable.call
      end

      it "doesn't evaluate the memoized method more than once" do
        expect(@count).to eq(1)
      end
    end

    describe "when making a copy" do
      let(:copy) { immutable.copy }

      before(:each) do
        copy.call
      end

      it "should clear all memory" do
        expect(@count).to eq(2)
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
hamster-1.0.1.pre.rc.1	spec/hamster/immutable/memoize_spec.rb