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require File.expand_path('../../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
ruby_version_is '2.4' do
describe 'Enumerator::Lazy#uniq' do
context 'when yielded with an argument' do
before :each do
@lazy = [0, 1, 2, 3].to_enum.lazy.uniq(&:even?)
end
it 'returns a lazy enumerator' do
@lazy.should be_an_instance_of(Enumerator::Lazy)
@lazy.force.should == [0, 1]
end
it 'sets the size to nil' do
@lazy.size.should == nil
end
end
context 'when yielded with multiple arguments' do
before :each do
enum = Object.new.to_enum
class << enum
def each
yield 0, 'foo'
yield 1, 'FOO'
yield 2, 'bar'
end
end
@lazy = enum.lazy
end
it 'returns all yield arguments as an array' do
@lazy.uniq { |_, label| label.downcase }.force.should == [[0, 'foo'], [2, 'bar']]
end
end
end
end
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