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describe 'Enumerable#each_with_object' do
it 'reports argument error when no arguments given' do
begin
[].each_with_object
fail 'ArgumentError not raised!'
rescue ArgumentError => e
# TODO JRuby does seem to get a different error message than MRI
#expect( e.message ).to eql 'wrong number of arguments (0 for 1)'
end
end
it 'works with a 2 arg lambda passed as block' do
storategy = lambda { |str, hash| hash[str] = str }
result = %w(a b c d e f).each_with_object({}, &storategy)
expected = {"a"=>"a", "b"=>"b", "c"=>"c", "d"=>"d", "e"=>"e", "f"=>"f"}
expect( result ).to eql expected
end
it 'works just fine with a block' do
result = %w(a b c d e f).each_with_object({}) { |v, hash| hash[v] = v }
expected = {"a"=>"a", "b"=>"b", "c"=>"c", "d"=>"d", "e"=>"e", "f"=>"f"}
expect( result ).to eql expected
other = []
result = %w(a b c d e f).each_with_object({}) { |v| other << v }
expect( result ).to be_empty
expect( other ).to eql %w(a b c d e f)
end
end
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