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##
# Hash(Ext) Test
assert('Hash#merge!') do
a = { 'abc_key' => 'abc_value', 'cba_key' => 'cba_value' }
b = { 'cba_key' => 'XXX', 'xyz_key' => 'xyz_value' }
result_1 = a.merge! b
a = { 'abc_key' => 'abc_value', 'cba_key' => 'cba_value' }
result_2 = a.merge!(b) do |key, original, new|
original
end
result_1 == {'abc_key' => 'abc_value', 'cba_key' => 'XXX',
'xyz_key' => 'xyz_value' } and
result_2 == {'abc_key' => 'abc_value', 'cba_key' => 'cba_value',
'xyz_key' => 'xyz_value' }
end
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