Ruby program to check overlapping calendar

calender_overlapp.rb

class Calender
    attr_accessor  :start_time, :end_time
    def initialize(start_time:, end_time:)
      @start_time = start_time
      @end_time = end_time
    end
end
  
def is_overlapping?(c1, c2)
    (c1.start_time < c2.end_time) && (c2.start_time < c1.end_time)
end
  

calender_overlapp_spec.rb

require 'rspec'
require_relative '../calender_overlapping'

RSpec.describe 'is_overlapping?' do

  it 'returns true when the end of event A is overlapping event B' do
    eventA = Calender.new(start_time: "10:00", end_time: "11:00")
    eventB = Calender.new(start_time: "10:45", end_time: "11:45")
    expect(is_overlapping?(eventA, eventB)).to be true
  end

  it 'returns true when the start of A is overlapping event B' do
    eventA = Calender.new(start_time: "10:15", end_time: "11:00")
    eventB = Calender.new(start_time: "10:00", end_time: "11:45")
    expect(is_overlapping?(eventA, eventB)).to be true

  end

  it 'returns true when A is completely included in B' do
    eventA = Calender.new(start_time: "10:20", end_time: "10:40")
    eventB = Calender.new(start_time: "10:00", end_time: "11:00")
    expect(is_overlapping?(eventA, eventB)).to be true

  end

  it 'returns true when B is completely included in A' do
    eventA = Calender.new(start_time: "10:00", end_time: "11:00")
    eventB = Calender.new(start_time: "10:20", end_time: "10:40")
    expect(is_overlapping?(eventB, eventA)).to be true

  end

  it 'returns true when A and B match exactly' do
    eventA = Calender.new(start_time: "10:00", end_time: "11:00")
    eventB = Calender.new(start_time: "10:00", end_time: "11:00")
    expect(is_overlapping?(eventA, eventB)).to be true

  end

  it 'returns false when A and B do not match' do
    eventA = Calender.new(start_time: "12:00", end_time: "13:00")
    eventB = Calender.new(start_time: "13:00", end_time: "14:00")
    expect(is_overlapping?(eventA, eventB)).to be false
    expect(is_overlapping?(eventB, eventA)).to be false
  end
end