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require 'abstract_unit'
require 'active_support/core_ext/object'
class DeepDupTest < ActiveSupport::TestCase
def test_array_deep_dup
array = [1, [2, 3]]
dup = array.deep_dup
dup[1][2] = 4
assert_equal nil, array[1][2]
assert_equal 4, dup[1][2]
end
def test_hash_deep_dup
hash = { :a => { :b => 'b' } }
dup = hash.deep_dup
dup[:a][:c] = 'c'
assert_equal nil, hash[:a][:c]
assert_equal 'c', dup[:a][:c]
end
def test_array_deep_dup_with_hash_inside
array = [1, { :a => 2, :b => 3 } ]
dup = array.deep_dup
dup[1][:c] = 4
assert_equal nil, array[1][:c]
assert_equal 4, dup[1][:c]
end
def test_hash_deep_dup_with_array_inside
hash = { :a => [1, 2] }
dup = hash.deep_dup
dup[:a][2] = 'c'
assert_equal nil, hash[:a][2]
assert_equal 'c', dup[:a][2]
end
def test_deep_dup_initialize
zero_hash = Hash.new 0
hash = { :a => zero_hash }
dup = hash.deep_dup
assert_equal 0, dup[:a][44]
end
def test_object_deep_dup
object = Object.new
dup = object.deep_dup
dup.instance_variable_set(:@a, 1)
assert !object.instance_variable_defined?(:@a)
assert dup.instance_variable_defined?(:@a)
end
end
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