ruby--ruby/spec/ruby/core/array/union_spec.rb

require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/union'

describe "Array#|" do
  it_behaves_like :array_binary_union, :|
end

ruby_version_is "2.6" do
  describe "Array#union" do
    it_behaves_like :array_binary_union, :union

    it "returns unique elements when given no argument" do
      x = [1, 2, 3, 2]
      x.union.should == [1, 2, 3]
    end

    it "does not return subclass instances for Array subclasses" do
      ArraySpecs::MyArray[1, 2, 3].union.should be_an_instance_of(Array)
    end

    it "accepts multiple arguments" do
      x = [1, 2, 3]
      x.union(x, x, x, x, [3, 4], x).should == [1, 2, 3, 4]
    end
  end
end