diff options
Diffstat (limited to 'spec/ruby/core/hash/keys_spec.rb')
-rw-r--r-- | spec/ruby/core/hash/keys_spec.rb | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/spec/ruby/core/hash/keys_spec.rb b/spec/ruby/core/hash/keys_spec.rb new file mode 100644 index 0000000000..bc7855f73b --- /dev/null +++ b/spec/ruby/core/hash/keys_spec.rb @@ -0,0 +1,23 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Hash#keys" do + + it "returns an array with the keys in the order they were inserted" do + {}.keys.should == [] + {}.keys.should be_kind_of(Array) + Hash.new(5).keys.should == [] + Hash.new { 5 }.keys.should == [] + { 1 => 2, 4 => 8, 2 => 4 }.keys.should == [1, 4, 2] + { 1 => 2, 2 => 4, 4 => 8 }.keys.should be_kind_of(Array) + { nil => nil }.keys.should == [nil] + end + + it "uses the same order as #values" do + h = { 1 => "1", 2 => "2", 3 => "3", 4 => "4" } + + h.size.times do |i| + h[h.keys[i]].should == h.values[i] + end + end +end |