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johana-star/format_date_range.rb

Forked from madrobby/gist:e78cd94e7d4ad374e0ac
Last active August 29, 2015 14:04
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format_date_range.rb
require "active_support/all"
def format_date_range(from, to = false)
to = from if to.blank?
return '' if from.nil? && to.nil?
from, to = [to, from].sort
if from == to
month_day_year(from)
elsif from.year == to.year
format_date_range_in_the_same_year(from, to)
elsif from.beginning_of_month == from && to.end_of_month == to
"#{month_year(from)} – #{month_year(to)}"
else
"#{month_day_year(from)} – #{month_day_year(to)}"
end.squish
end
def format_date_range_in_the_same_year(from, to)
if from.month == to.month && from.beginning_of_month == from && to.end_of_month == to
month_year(from)
elsif from.beginning_of_month == from && to.end_of_month == to
"#{from.strftime('%B')}–#{month_year(to)}"
elsif from.month == to.month
"#{from.strftime('%B %e')}–#{to.strftime('%e, %Y')}"
else
"#{from.strftime('%B %e')} – #{month_day_year(to)}"
end
end
def month_year(date)
date.strftime('%B %Y')
end
def month_day_year(date)
date.strftime('%B %e, %Y')
end
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format_date_range_test.rb
require "./format_date_range"
require "date"
require "minitest/autorun"
describe "#format_date_range" do
describe "date ranges, including year threshold and full month" do
it "formats dates in the same month" do
assert_equal "April 2–17, 2014",
format_date_range(Date.new(2014,4,2),Date.new(2014,4,17))
end
it "formats dates in different months and years." do
assert_equal "December 13, 2013 – January 4, 2014",
format_date_range(Date.new(2013,12,13),Date.new(2014,1,4))
end
it "formats dates at the beginning and end of different months" do
assert_equal "May–June 2014",
format_date_range(Date.new(2014,5,1),Date.new(2014,6,30))
end
it "formats dates at the beginning and end of different months in different years" do
assert_equal "October 2013 – June 2014",
format_date_range(Date.new(2013,10,1),Date.new(2014,6,30))
end
it "formats the first and last of a month to the month itself" do
assert_equal "April 2014",
format_date_range(Date.new(2014,4,1),Date.new(2014,4,30))
end
end
describe "dates in reverse order" do
it "formats dates in the same month" do
assert_equal "April 2–17, 2014",
format_date_range(Date.new(2014,4,17),Date.new(2014,4,2))
end
it "formats dates in different months and years" do
assert_equal "December 13, 2013 – January 4, 2014",
format_date_range(Date.new(2014,1,4),Date.new(2013,12,13))
end
it "formats the last and first date of the month to be the month" do
assert_equal "April 2014",
format_date_range(Date.new(2014,4,30),Date.new(2014,4,1))
end
end
describe "same day" do
it "responds with that date" do
assert_equal "April 4, 2014",
format_date_range(Date.new(2014,4,4),Date.new(2014,4,4))
end
end
describe "alternate arguments" do
it "takes nil as its second argument" do
assert_equal format_date_range(Date.new(2014,4,4), nil), "April 4, 2014"
end
it "takes one argument" do
assert_equal format_date_range(Date.new(2014,4,4)), "April 4, 2014"
end
it "takes nil as its first argument" do
assert_raises(ArgumentError) { format_date_range(nil, Date.new(2014,4,4)) }
end
it "takes nil as both arguments" do
assert_equal format_date_range(nil, nil), ""
end
end
end
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