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# frozen_string_literal: true
require "abstract_unit"
require "active_support/core_ext/array"
class ExtractTest < ActiveSupport::TestCase
def test_extract
numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
array_id = numbers.object_id
odd_numbers = numbers.extract!(&:odd?)
assert_equal [1, 3, 5, 7, 9], odd_numbers
assert_equal [0, 2, 4, 6, 8], numbers
assert_equal array_id, numbers.object_id
end
def test_extract_without_block
numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
array_id = numbers.object_id
extract_enumerator = numbers.extract!
assert_instance_of Enumerator, extract_enumerator
assert_equal numbers.size, extract_enumerator.size
odd_numbers = extract_enumerator.each(&:odd?)
assert_equal [1, 3, 5, 7, 9], odd_numbers
assert_equal [0, 2, 4, 6, 8], numbers
assert_equal array_id, numbers.object_id
end
def test_extract_on_empty_array
empty_array = []
array_id = empty_array.object_id
new_empty_array = empty_array.extract! { }
assert_equal [], new_empty_array
assert_equal [], empty_array
assert_equal array_id, empty_array.object_id
end
end
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