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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_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_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_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_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
def test_deep_dup_with_hash_class_key
hash = { Integer => 1 }
dup = hash.deep_dup
assert_equal 1, dup.keys.length
end
end
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