diff options
Diffstat (limited to 'spec/ruby/core/hash/rehash_spec.rb')
-rw-r--r-- | spec/ruby/core/hash/rehash_spec.rb | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/rehash_spec.rb b/spec/ruby/core/hash/rehash_spec.rb index ff7b644786..db3e91b166 100644 --- a/spec/ruby/core/hash/rehash_spec.rb +++ b/spec/ruby/core/hash/rehash_spec.rb @@ -59,6 +59,54 @@ describe "Hash#rehash" do h.keys.should == [a] end + it "removes duplicate keys for large hashes" do + a = [1,2] + b = [1] + + h = {} + h[a] = true + h[b] = true + 100.times { |n| h[n] = true } + b << 2 + h.size.should == 102 + h.keys.should.include? a + h.keys.should.include? b + h.rehash + h.size.should == 101 + h.keys.should.include? a + h.keys.should_not.include? [1] + end + + it "iterates keys in insertion order" do + key = Class.new do + attr_reader :name + + def initialize(name) + @name = name + end + + def hash + 123 + end + end + + a, b, c, d = key.new('a'), key.new('b'), key.new('c'), key.new('d') + h = { a => 1, b => 2, c => 3, d => 4 } + h.size.should == 4 + + key.class_exec do + def eql?(other) + true + end + end + + h.rehash + h.size.should == 1 + k, v = h.first + k.name.should == 'a' + v.should == 4 + end + it "raises a FrozenError if called on a frozen instance" do -> { HashSpecs.frozen_hash.rehash }.should raise_error(FrozenError) -> { HashSpecs.empty_frozen_hash.rehash }.should raise_error(FrozenError) |