Removed duplicate implementation from tests

test/test_history_array.rb

@@ -1,109 +1,5 @@
 require 'helper'
 
-class Pry
-  # A history array is an array to which you can only add elements. Older
-  # entries are removed progressively, so that the aray never contains more than
-  # N elements.
-  #
-  # @example
-  #   ary = Pry::HistoryArray.new 10
-  #   ary << 1 << 2 << 3
-  #   ary[0] # => 1
-  #   ary[1] # => 2
-  #   10.times { |n| ary << n }
-  #   ary[0] # => nil
-  #   ary[-1] # => 9
-  class HistoryArray
-    include Enumerable
-
-    # @param [Integer] size Maximum amount of objects in the array
-    def initialize(size)
-      @max_size = size
-
-      @hash  = {}
-      @count = 0
-    end
-
-    # Pushes an object at the end of the array
-    # @param [Object] value Object to be added
-    def <<(value)
-      @hash[@count] = value
-
-      if @hash.size > max_size
-        @hash.delete(@count - max_size)
-      end
-
-      @count += 1
-
-      self
-    end
-
-    # @overload [](index)
-    #   @param [Integer] index Index of the item to access.
-    #   @return [Object, nil] Item at that index or nil if it has been removed.
-    # @overload [](index, size)
-    #   @param [Integer] index Index of the first item to access.
-    #   @param [Integer] size Amount of items to access
-    #   @return [Array, nil] The selected items. Nil if index is greater than
-    #     the size of the array.
-    # @overload [](range)
-    #   @param [Range<Integer>] range Range of indices to access.
-    #   @return [Array, nil] The selected items. Nil if index is greater than
-    #     the size of the array.
-    def [](index_or_range, size = nil)
-      if index_or_range.is_a? Integer
-        index = convert_index(index_or_range)
-
-        if size
-          end_index = index + size
-          index > @count ? nil : (index...[end_index, @count].min).map do |n|
-            @hash[n]
-          end
-        else
-          @hash[index]
-        end
-      else
-        range = convert_range(index_or_range)
-        range.begin > @count ? nil : range.map { |n| @hash[n] }
-      end
-    end
-
-    # @return [Integer] Amount of objects in the array
-    def size
-      @count
-    end
-
-    def each
-      ((@count - size)...@count).each do |n|
-        yield @hash[n]
-      end
-    end
-
-    def to_a
-      ((@count - size)...@count).map { |n| @hash[n] }
-    end
-
-    def inspect
-      to_a.inspect
-    end
-
-    # @return [Integer] Maximum amount of objects in the array
-    attr_reader :max_size
-
-    private
-    def convert_index(n)
-      n >= 0 ? n : @count + n
-    end
-
-    def convert_range(range)
-      end_index = convert_index(range.end)
-      end_index += 1 unless range.exclude_end?
-
-      Range.new(convert_index(range.begin), [end_index, @count].min, true)
-    end
-  end
-end
-
 describe Pry::HistoryArray do
   before do
     @array = Pry::HistoryArray.new 10