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ruby--ruby/spec/rubyspec/library/set/flatten_merge_spec.rb
eregon 95e8c48dd3 Add in-tree mspec and ruby/spec
* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-05-07 12:04:49 +00:00

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require File.expand_path('../../../spec_helper', __FILE__)
require 'set'
describe "Set#flatten_merge" do
it "is protected" do
Set.should have_protected_instance_method("flatten_merge")
end
it "flattens the passed Set and merges it into self" do
set1 = Set[1, 2]
set2 = Set[3, 4, Set[5, 6]]
set1.send(:flatten_merge, set2).should == Set[1, 2, 3, 4, 5, 6]
end
it "raises an ArgumentError when trying to flatten a recursive Set" do
set1 = Set[1, 2, 3]
set2 = Set[5, 6, 7]
set2 << set2
lambda { set1.send(:flatten_merge, set2) }.should raise_error(ArgumentError)
end
end