# require 'spec_helper'
#
# describe Hamster::Hash do
#
#   describe "#remove" do
#
#     describe "the last key" do
#
#       before do
#         @hash = Hamster::Hash.new.put("A", "aye").remove("A")
#       end
#
#       it "no longer provides access to the removed key" do
#         @hash.key?("A").should == false
#       end
#
#     end
#
#     describe "with an existing key" do
#
#       before do
#         @original = Hamster::Hash.new.put("A", "aye").put("B", "bee")
#         @copy = @original.remove("A")
#       end
#
#       it "returns a modified copy" do
#         @copy.should_not equal(@original)
#       end
#
#       describe "the original" do
#
#         it "still has the original key/value pairs" do
#           @original.get("A").should == "aye"
#           @original.get("B").should == "bee"
#         end
#
#         it "still has the original size" do
#           @original.size.should == 2
#         end
#
#       end
#
#       describe "the modified copy" do
#
#         it "has all but the removed original key/value pairs" do
#           @copy.get("B").should == "bee"
#         end
#
#         it "doesn't have the removed key" do
#           @copy.key?("A").should == false
#         end
#
#         it "has a size one less than the original" do
#           @copy.size.should == 1
#         end
#
#       end
#
#     end
#
#     describe "with non-existing keys" do
#
#       before do
#         @original = Hamster::Hash.new.put("A", "aye")
#         @copy = @original.remove("missing")
#       end
#
#       it "returns self" do
#         @copy.should equal(@original)
#       end
#
#       describe "the original" do
#
#         it "still has the original key/value pairs" do
#           @original.get("A").should == "aye"
#         end
#
#         it "still has the original size" do
#           @original.size.should == 1
#         end
#
#       end
#
#     end
#
#     describe "with keys of the same hash value" do
#
#       class Key
#         def hash; 1; end
#       end
#
#       def instance_count
#         ObjectSpace.garbage_collect
#         ObjectSpace.each_object(Hamster::Trie) {}
#       end
#
#       before do
#         @a = Key.new
#         @b = Key.new
#         @original = Hamster::Hash.new.put(@a, "aye").put(@b, "bee")
#       end
#
#       it "no longer provides access to the removed key" do
#         copy = @original.remove(@b)
#         copy.key?(@b).should == false
#       end
#
#       it "provides access to the remaining keys" do
#         copy = @original.remove(@a)
#         copy.get(@b).should == "bee"
#       end
#
#     end
#
#   end
#
# end