diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 000000000..1ad899dbc
Binary files /dev/null and b/.DS_Store differ
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 000000000..3391136e7
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,10 @@
+require 'rake/testtask'
+
+Rake::TestTask.new do |t|
+  t.libs = ["lib"]
+  t.warning = true
+  t.test_files = FileList['specs/*_spec.rb']
+end
+
+task default: :test
+
diff --git a/lib/block.rb b/lib/block.rb
new file mode 100644
index 000000000..25e892b12
--- /dev/null
+++ b/lib/block.rb
@@ -0,0 +1,34 @@
+require 'date'
+require 'pry'
+
+module Hotel
+  class Block < Reservation
+
+    RATE_DISCOUNT = 0.8
+
+    attr_accessor :block_size, :reserved_rooms
+
+    def initialize(input)
+      super
+
+      @block_size = input[:block_size]
+      @reserved_rooms = Array.new
+
+      if block_size > 5
+        raise StandardError.new('The maximum bock size is 5 rooms.')
+      elsif block_size < 2
+        raise StandardError.new('The minimum block size is 2 rooms.')
+      end
+
+    end
+
+    def calculate_cost
+      duration = Integer(check_out- check_in)
+       reservation_cost = duration * (RATE * RATE_DISCOUNT)
+      return reservation_cost
+    end
+
+
+
+  end # end of block
+end # end of module
diff --git a/lib/hotel_manager.rb b/lib/hotel_manager.rb
new file mode 100644
index 000000000..0f7f199cc
--- /dev/null
+++ b/lib/hotel_manager.rb
@@ -0,0 +1,85 @@
+require 'date'
+require 'pry'
+
+module Hotel
+  class HotelManager
+
+    attr_reader :room_list
+    attr_accessor :reservations
+
+    def initialize
+      @room_list = load_rooms
+      @reservations = Array.new
+      # puts "A new hotel manager has been created."
+    end
+
+    def load_rooms
+      room_list = Array(1..20)
+      return room_list
+    end
+
+    def get_reservation_id
+
+      if @reservations == []
+        next_reservation_id = 1
+        # puts "The next reservation will be #{next_reservation_id}"
+        return next_reservation_id
+      else
+        next_reservation_id = @reservations.length + 1
+        # puts "The next reservation will be #{next_reservation_id}"
+        return next_reservation_id
+      end
+    end
+
+    def reservations_by_date(date)
+      reservation_list = []
+      @reservations.each do |reservation|
+        if reservation.stay_date_list.include?(date)
+          reservation_list << reservation
+        end
+      end
+      return reservation_list
+    end
+
+    def find_available_rooms(start_date, end_date)
+      potential_dates = (start_date..(end_date - 1)).to_a
+      unavailable_rooms = []
+      @reservations.each do |reservation|
+        date_check_list = reservation.stay_date_list
+        checked_date_list = date_check_list - potential_dates
+        if checked_date_list.length < date_check_list.length
+          unavailable_rooms << reservation.room_id
+        end
+      end
+
+      if unavailable_rooms.length == 20
+        raise StandardError.new('There are no available rooms at this time.')
+      elsif unavailable_rooms.length > 0
+        available_rooms = @room_list - unavailable_rooms
+        else
+          available_rooms = @room_list
+      end
+      return available_rooms
+    end
+
+    def get_available_room(check_in_date, check_out_date)
+      potential_rooms = find_available_rooms(check_in_date, check_out_date)
+      next_room_id = potential_rooms.first
+      # puts "the next room id will be #{next_room_id}"
+      return next_room_id
+    end
+
+    def add_reservation(check_in_date, check_out_date)
+      new_reservation = Hotel::Reservation.new({reservation_id: get_reservation_id, room_id: get_available_room(check_in_date, check_out_date), check_in: check_in_date, check_out: check_out_date})
+      @reservations.push(new_reservation)
+      # puts "the new reservation is #{new_reservation}."
+      return new_reservation
+    end
+
+    def add_block(block_size, check_in_date, check_out_date)
+      new_block = Hotel::Block.new({reservation_id: get_reservation_id, block_size: block_size, check_in: check_in_date, check_out: check_out_date})
+      @reservations.push(new_block)
+    end
+
+  end # end of class
+end # end of module
diff --git a/lib/reservation.rb b/lib/reservation.rb
new file mode 100644
index 000000000..f2a242e2d
--- /dev/null
+++ b/lib/reservation.rb
@@ -0,0 +1,38 @@
+require 'date'
+require 'pry'
+
+module Hotel
+  class Reservation
+
+    RATE = 200.00
+
+    attr_accessor :reservation_id, :room_id, :check_in, :check_out
+
+    def initialize(input)
+      @reservation_id = input[:reservation_id]
+      @room_id = input[:room_id]
+      @check_in = input[:check_in]
+      @check_out = input[:check_out]
+
+      if check_in == check_out
+        raise StandardError.new('The start date and the end date cannot be the same date.')
+      elsif check_in > check_out
+        raise StandardError.new('The end date cannot be before the start date.')
+      end
+
+    end
+
+    def stay_date_list
+      list_of_dates = (@check_in..@check_out).to_a
+      list_of_dates = list_of_dates[0..-2]
+      return list_of_dates
+    end
+
+    def calculate_cost
+      duration = Integer(check_out- check_in)
+       reservation_cost = duration * RATE
+      return reservation_cost
+    end
+
+  end # end of class
+end # end of module
diff --git a/specs/block_spec.rb b/specs/block_spec.rb
new file mode 100644
index 000000000..c9c3f4252
--- /dev/null
+++ b/specs/block_spec.rb
@@ -0,0 +1,51 @@
+require_relative "spec_helper.rb"
+
+describe 'block' do
+  describe 'initialize' do
+    it 'instantiates the class properties as the correct class type' do
+      input = {reservation_id: 1, block_size: 2, check_in: Date.new(2018, 7, 06), check_out: Date.new(2018, 7, 10)}
+      @new_block = Hotel::Block.new(input)
+
+      @new_block.reservation_id.must_be_kind_of Integer
+      @new_block.block_size.must_be_kind_of Integer
+      @new_block.check_in.must_be_kind_of Date
+      @new_block.check_out.must_be_kind_of Date
+      @new_block.reserved_rooms.must_be_kind_of Array
+    end
+
+    it 'raises an error if provided an invalid date range' do
+
+      # the start and end dates are the same
+      proc{
+      @new_block = Hotel::Block({reservation_id: 1, block_size: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 25)})
+      }.must_raise StandardError
+
+      # the start date is after the end date
+      proc{
+      @new_block1 = Hotel::Block({reservation_id: 1, block_size: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 19)})
+      }.must_raise StandardError
+    end
+
+    it 'raises an error if provided an invalid block size' do
+
+      proc{
+      @new_block = Hotel::Block({reservation_id: 1, block_size: 6, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 26)})
+      }.must_raise StandardError
+
+      proc{
+      @new_block = Hotel::Block({reservation_id: 1, block_size: 1, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 26)})
+      }.must_raise StandardError
+    end
+  end # end of describe initialize
+
+  describe 'calculate_cost' do
+    it 'calculates cost based on block rate not reservation rate' do
+      input = {reservation_id: 1, block_size: 2, check_in: Date.new(2018, 7, 06), check_out: Date.new(2018, 7, 10)}
+      @new_block = Hotel::Block.new(input)
+
+      @new_block.calculate_cost.must_equal 640
+    end
+  end
+
+
+end # end of describe Block
diff --git a/specs/hotel_manager_spec.rb b/specs/hotel_manager_spec.rb
new file mode 100644
index 000000000..9875c0f8f
--- /dev/null
+++ b/specs/hotel_manager_spec.rb
@@ -0,0 +1,149 @@
+require_relative "spec_helper.rb"
+
+describe 'HotelManager' do
+  describe 'initialize' do
+    before do
+      @new_hotel = Hotel::HotelManager.new
+    end
+    it 'can create a new instance of HotelManager' do
+      @new_hotel.must_be_instance_of Hotel::HotelManager
+    end # end of can create new instance
+
+    # it 'can call class properties when instantiated' do
+    #   [room_list, reservations].each do |prop|
+    #     @new_hotel.must_respond_to prop
+    #   end
+    # end
+
+    it 'instantiates the properties correctly' do
+      @new_hotel.room_list.must_be_kind_of Array
+      @new_hotel.reservations.must_be_kind_of Array
+      @new_hotel.reservations.length.must_equal 0
+    end
+  end # end of describe initialize
+
+  describe 'load_rooms' do
+    it 'correctly creates room_list array' do
+      @new_hotel = Hotel::HotelManager.new
+      @new_hotel.room_list.length.must_equal 20
+    end
+  end # end of describe load_rooms
+
+  describe 'get_reservation_id' do
+    it 'correctly generates the next reservation_id when no reservations' do
+      @new_hotel = Hotel::HotelManager.new
+      @new_hotel.reservations.length.must_equal 0
+      @new_hotel.get_reservation_id.must_equal 1
+    end
+    it 'correctly generates the next reservation_id when reservations already exist' do
+      @new_hotel = Hotel::HotelManager.new
+      @new_hotel.reservations = [1, 2, 3]
+      @new_hotel.reservations.length.must_equal 3
+      @new_hotel.get_reservation_id.must_equal 4
+    end
+
+  end # end of describe 'get_reservation_id'
+
+  describe 'get_available_room' do
+    it 'must return an appropriate room id' do
+      @new_hotel = Hotel::HotelManager.new
+      @start_date = Date.new(2018, 5, 26)
+      @end_date = Date.new(2018, 5, 28)
+      room_id = @new_hotel.get_available_room(@start_date, @end_date)
+      room_id.must_be_kind_of Integer
+      room_id.must_be :>, 0
+      room_id.must_be :<, 21
+    end
+  end # end of get_available_room
+
+  describe 'add_reservation' do
+    it 'creates an instance of Reservation' do
+      @new_hotel = Hotel::HotelManager.new
+
+      @new_hotel.add_reservation(Date.new(2018, 3, 25), Date.new(2018, 3, 28)).must_be_instance_of Hotel::Reservation
+    end
+
+    it 'adds the reservation to array of reservations' do
+      @new_hotel = Hotel::HotelManager.new
+      @new_hotel.reservations.length.must_equal 0
+      @new_hotel.add_reservation(Date.new(2018, 3, 25),   Date.new(2018, 3, 28))
+      @new_hotel.reservations.length.must_equal 1
+    end
+  end # end of describe add_reservation
+
+  describe 'reservations_by_date' do
+    before do
+      @overlap_date = Date.new(2018, 5, 26)
+      @new_hotel = Hotel::HotelManager.new
+
+      # Two should contain the overlap date
+      @new_hotel.add_reservation(@overlap_date - 1, @overlap_date + 1)
+      @new_hotel.add_reservation(@overlap_date - 5, @overlap_date + 3)
+
+      # One should not
+      @new_hotel.add_reservation(@overlap_date - 20, @overlap_date - 15)
+      # puts "This is to check what is in #{@new_hotel}"
+    end
+
+    it 'returns an array of reservations for a specific date' do
+      # binding.pry
+      reservation_list = @new_hotel.reservations_by_date(@overlap_date)
+      reservation_list.must_be_instance_of Array
+      reservation_list.length.must_equal 2
+      reservation_list.each do |res|
+        res.must_be_instance_of Hotel::Reservation
+      end
+    end
+
+  end # end of describe reservations_by_date
+
+  describe 'find_available_rooms' do
+
+    it 'returns correct size list when 1 overlapping date' do
+      @begin_date = Date.new(2018, 5, 26)
+      @end_date = Date.new(2018, 5, 28)
+      @new_hotel = Hotel::HotelManager.new
+
+      # one reservation should affect returned array
+      @new_hotel.add_reservation(@begin_date - 2, @end_date + 3)
+      @new_hotel.add_reservation(@begin_date + 45, @end_date + 47)
+      @new_hotel.find_available_rooms(@begin_date, @end_date).length.must_equal 19
+    end
+
+    it 'returns correct size list when no overlapping dates' do
+      @begin_date = Date.new(2018, 5, 26)
+      @end_date = Date.new(2018, 5, 28)
+      @new_hotel = Hotel::HotelManager.new
+      # neither reservation should affect returned array
+      @new_hotel.add_reservation(@begin_date - 20, @end_date - 15)
+      @new_hotel.add_reservation(@begin_date + 45, @end_date + 47)
+      @new_hotel.find_available_rooms(@begin_date, @end_date).length.must_equal 20
+    end
+
+    it 'raises an error if there are no available rooms' do
+    proc{
+      @new_hotel = Hotel::HotelManager.new
+      check_in_date = Date.new(2018, 3, 12)
+      check_out_date = Date.new(2018, 3, 20)
+      21.times do
+        @new_hotel.add_reservation(check_in_date, check_out_date)
+      end
+      @new_hotel.find_available_rooms(Date.new(2018, 3, 12), Date.new(2018, 3, 20))
+    }.must_raise StandardError
+    end
+  end # end of describe find_available_rooms
+
+end # end of describe HotelManager
+
+
+
+      # Two should contain the overlap date
+      # @new_hotel.add_reservation(@begin_date - 1, @overlap_date + 1)
+      # @new_hotel.add_reservation(@begin_date- 5, @end_date + 3)
+      #
+      # # One should not
+      # @new_hotel.add_reservation(@begin_date - 20, @end_date - 15)
+
+# check_in_date = Date.new(2018, 4, 15)
+# check_out_date = Date.new(2018, 4, 24)
+# @new_hotel.add_reservation(check_in_date, check_out_date)
diff --git a/specs/reservation_spec.rb b/specs/reservation_spec.rb
new file mode 100644
index 000000000..598c2d150
--- /dev/null
+++ b/specs/reservation_spec.rb
@@ -0,0 +1,57 @@
+require_relative "spec_helper.rb"
+
+describe 'reservation' do
+  describe 'initialize' do
+    before do
+      @new_reservation = Hotel::Reservation.new({reservation_id: 1, room_id: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 27)})
+    end
+
+    it 'instantiates the class properties as the correct class type' do
+      @new_reservation.reservation_id.must_be_kind_of Integer
+      @new_reservation.room_id.must_be_kind_of Integer
+      @new_reservation.check_in.must_be_kind_of Date
+      @new_reservation.check_out.must_be_kind_of Date
+    end
+
+    it 'raises an error if provided an invalid date range' do
+
+      # the start and end dates are the same
+      proc{
+      @new_reservation = Hotel::Reservation.new({reservation_id: 1, room_id: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 25)})
+      }.must_raise StandardError
+
+      # the start date is after the end date
+      proc{
+      @new_reservation1 = Hotel::Reservation.new({reservation_id: 1, room_id: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 19)})
+      }.must_raise StandardError
+    end
+
+  end # end of initialize
+
+  describe 'stay_date_list' do
+    before do
+      @new_reservation = Hotel::Reservation.new({reservation_id: 1, room_id: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 27)})
+    end
+
+    it 'returns a list of dates that are covered by a reservation' do
+      date_list = @new_reservation.stay_date_list
+      date_list.must_be_kind_of Array
+      date_list[0].must_be_instance_of Date
+      date_list.length.must_equal 2
+    end
+
+  end
+
+  describe 'calculate_duration_of_stay' do
+    before do
+      @new_reservation = Hotel::Reservation.new({reservation_id: 1, room_id: 2, check_in: Date.new(2018, 5, 25), check_out: Date.new(2018, 5, 27)})
+    end
+
+    it 'returns a float of the correct cost' do
+      cost = @new_reservation.calculate_cost
+      cost.must_be_kind_of Float
+      cost.must_equal 400.00
+    end
+  end # end of describe calculate_cost
+
+end # end of describe Reservation
diff --git a/specs/spec_helper.rb b/specs/spec_helper.rb
new file mode 100644
index 000000000..0ce377c57
--- /dev/null
+++ b/specs/spec_helper.rb
@@ -0,0 +1,15 @@
+require 'simplecov'
+SimpleCov.start do
+  add_filter "/specs/"
+end
+require 'minitest'
+require 'minitest/autorun'
+require 'minitest/reporters'
+# Add simplecov
+
+Minitest::Reporters.use! Minitest::Reporters::SpecReporter.new
+
+# Require_relative your lib files here!
+require_relative '../lib/hotel_manager'
+require_relative '../lib/reservation'
+require_relative '../lib/block'