require 'minitest/autorun'
require 'minitest/mock'
require 'retries'
require_relative '../test_helper'
require_relative '../../lib/repos/tree'
require_relative '../../lib/exceptions'

class TestReposTree < MiniTest::Test

  def setup
  	# eliminates delay between retries 
  	Retries.sleep_enabled = false
  end 
  def test_fetching
    rest_client = MiniTest::Mock.new
    result = MiniTest::Mock.new

    url = 'http://something/'
    full_request_url =  "#{url}/tree/input"
    rest_client.expect :get,  result, [full_request_url]
    result.expect :body, "[1,2,3]", []
    repo = Pruning::Repos::Tree.new(rest_client, url)
    actual = repo.get('input')
    rest_client.verify
    result.verify

    assert_equal [1,2,3], actual
  end

  def test_404
    rest_client = MiniTest::Mock.new
    result = MiniTest::Mock.new
    response = MiniTest::Mock.new


    url = 'http://something/'
    rest_client.expect(:get,  result) do |arguments|
      raise RestClient::ExceptionWithResponse, response
    end
    response.expect :code, 404, []
    repo = Pruning::Repos::Tree.new(rest_client, url)


    assert_raises Pruning::Exceptions::OriginCannotFindTheResource do
      repo.get('input')
    end

    rest_client.verify
    result.verify
    response.verify
  end

  def test_retries_working
    rest_client = MiniTest::Mock.new
    result = MiniTest::Mock.new
    response = MiniTest::Mock.new

    url = 'http://something/'
    full_request_url =  "#{url}/tree/input"

    # two times fails 
    2.times do 
      rest_client.expect(:get,  result) do |arguments|
        raise RestClient::ExceptionWithResponse, response
      end
      response.expect :code, 500, []
    end


    # third times succeeds
    rest_client.expect :get,  result, [full_request_url]
    result.expect :body, "[1,2,3]", []

    repo = Pruning::Repos::Tree.new(rest_client, url)
    
    actual = repo.get('input')

    # ensures that there were 3 retries
    rest_client.verify
    result.verify
    response.verify

    assert_equal [1,2,3], actual
  end

  def test_retries_failing
    rest_client = MiniTest::Mock.new
    result = MiniTest::Mock.new
    response = MiniTest::Mock.new

    url = 'http://something/'
    full_request_url =  "#{url}/tree/input"


    # three times fails 
    3.times do 
      rest_client.expect(:get,  result) do |arguments|
        raise RestClient::ExceptionWithResponse, response
      end
      response.expect :code, 500, []
    end

    repo = Pruning::Repos::Tree.new(rest_client, url)
    assert_raises Pruning::Exceptions::ServerErrorOnOrigin do
      repo.get('input')
    end

    # ensures that there were 3 retries
    rest_client.verify
    result.verify
    response.verify
  end
end