test cases for reddit daily programmer challenge #205

friendly_dates_test.rb

require_relative 'friendly_date_ranges'
require 'minitest/autorun'

class FriendlyDatesTest < Minitest::Test
  def test_teen_day_formatting
   input   = '2015-07-11 2015-08-12'
   results = FriendlyDates.new(input)
   assert_equal '11th', results.date1.day
   assert_equal '12th', results.date2.day
  end

  def test_end_of_month_formatting
    input   =  '2011-6-22 2012-12-31'
    results = FriendlyDates.new(input)
    assert_equal '22nd', results.date1.day
    assert_equal '31st', results.date2.day
  end

  def test_omits_month_and_year
    input = '2015-07-01 2015-07-04'
    assert_equal 'July 1st - 4th', FriendlyDates.new(input).result
  end

  def test_omits_current_and_last_years
    input    = '2015-12-01 2016-02-03'
    expected = 'December 1st - February 3rd'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_multi_years
    input    = '2015-12-01 2017-02-03'
    expected = 'December 1st, 2015 - February 3rd, 2017'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_omits_first_date_year
    input    = '2016-03-01 2016-05-05'
    expected = 'March 1st - May 5th, 2016'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_same_date
    input    = '2017-01-01 2017-01-01'
    expected = 'January 1st, 2017'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_future_dates
    input = '2022-09-05 2023-09-04'
    expected = 'September 5th, 2022 - September 4th, 2023'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_edge_case_1
    input = '2015-04-01 2020-09-10'
    expected = 'April 1st, 2015 - September 10th, 2020'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_edge_case_1_1
    input = '2015-12-01 2016-02-03'
    expected = 'December 1st - February 3rd'
    assert_equal expected, FriendlyDates.new(input).result
  end

  def test_edge_case_2
    input    = '2015-12-11 2016-12-11'
    expected = 'December 11th, 2015 - December 11th, 2016'
    assert_equal expected, FriendlyDates.new(input).result
  end
end