require File.expand_path('spec/spec_helper')
require './lib/yaml_properties'

describe YamlProperties do
  context "in general" do
    before do
      File.stub(:open)
      YamlProperties.dev_environment = false

      Psych.stub(:load).and_return properties
    end

    let(:properties) do
      {
        "life_the_universe_and_everything" => 42,
        "some_string_value"                => "something",
        "a boolean"                        => true,
        "parent"                           => {
          "child"=>"Egg"}
      }
    end

    context "in non dev" do
      before do
        YamlProperties.dev_environment = false
        YamlProperties.reset!
      end

      specify "it caches yaml file" do
        YamlProperties.should_receive(:load_properties).
          exactly(1).times.and_return properties

        YamlProperties.some_string_value
        YamlProperties.some_string_value
      end
    end

    context "in dev environment" do
      before do
        YamlProperties.dev_environment = true
        YamlProperties.reset!
      end


      specify "reload so Rails/Sinatra don't need restarting" do
        YamlProperties.should_receive(:load_properties).at_least(2).times.and_return properties
        YamlProperties.some_string_value
        YamlProperties.some_string_value

      end
    end

    specify "overriding attributes (in e.g. tests)" do
      YamlProperties.override_attribute :life_the_universe_and_everything, 13
      YamlProperties.life_the_universe_and_everything.should == 13
      YamlProperties.reset!
      YamlProperties.life_the_universe_and_everything.should == 42
    end

    specify "non-existent attribute overrides shouldn't work" do
      ->{
        YamlProperties.override_attribute :unset_attribute,
        "let's not allow typos to cause us grief"}.
        should raise_error ArgumentError
    end

    specify do
      YamlProperties.properties.should == properties
    end
    specify do
      YamlProperties.life_the_universe_and_everything.should == 42
    end

    specify do
      YamlProperties.some_string_value.should == "something"
    end

    specify do
      YamlProperties.send("a boolean").should == true
    end

    specify do
      YamlProperties.parent.should == {"child" => "Egg"}
    end

    context "extending a module" do
      module Acme
        extend YamlProperties
      end

      specify do
        Acme.life_the_universe_and_everything.should == 42
      end
    end
  end

  context "overriding yaml_file default" do
    module Mystery
      extend YamlProperties

      def self.yaml_file
        "./spec/fixtures/test.yml"
      end
    end

    specify do
      Mystery.life_the_universe_and_everything.should == "Nobody knows"
    end
  end

  context "with erb" do
    module ErbMystery
      extend YamlProperties

      def self.yaml_file
        "./spec/fixtures/erb.yml"
      end
    end

    before { ENV['mistery_message'] = "Everybody knows" }
    after  { ENV.delete 'mistery_message' }

    specify do
      ErbMystery.life_the_universe_and_everything.should == "Everybody knows"
    end
  end
end