TDD for Pandr

gistfile1.sh

$ ruby popularity_test.rb
Loaded suite popularity_test
Started
.
Finished in 0.000979 seconds.

1 tests, 4 assertions, 0 failures, 0 errors, 0 skips

popularity.rb

def most_popular_post(posts)
  posts.sort{ |a,b| a[:popularity] <=> b[:popularity] }.last
end

popularity_test.rb

require 'minitest/autorun'
require './popularity'

class TestPopularity < MiniTest::Unit::TestCase
  def setup
    @posts = [ { id: 1, popularity: 100 }, { id: 2, popularity: 50 }, { id: 3, popularity: 75 } ]
    @other_posts = [ { id: 6, popularity: 40 }, { id: 12, popularity: 50 }, { id: 8, popularity: 75 } ]
  end

  def test_most_popular_post_returns_most_popular
    post = most_popular_post(@posts)

    assert_equal 1, post[:id]
    assert_equal 100, post[:popularity]

    post = most_popular_post(@other_posts)

    assert_equal 8, post[:id]
    assert_equal 75, post[:popularity]
  end
end