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# frozen_string_literal: true
require_relative 'helper'
require 'set'
class TestArrayUtils < Test::Unit::TestCase
include DeterministicHelper
def setup
@array = FFaker::ArrayUtils.const_array('a'..'c')
@elems = Set.new('a'..'c')
end
def test_provides_a_way_of_freezing_the_elements_and_itself
assert @array.respond_to?(:freeze_all)
@array.freeze_all
assert @array.frozen?
@array.each { |e| assert e.frozen? }
end
def test_provides_a_way_of_getting_a_random_element
set = Set.new
1000.times { set << @array.sample }
assert set == @elems
end
def test_provides_a_way_of_getting_n_random_elements
assert_equal @array.sample(3).sort, @array.sort
1.upto(3) do |n|
1000.times do
new_arr = @array.sample(n)
assert_equal n, new_arr.length
new_arr.each do |e|
assert @elems.include? e
end
end
end
end
def test_provides_a_way_of_shuffling_the_array
assert_equal @array.shuffle.sort, @array.sort
different_arrangements = 0
1000.times do
new_arr = @array.shuffle
assert new_arr.to_set == @elems
different_arrangements += 1 if new_arr != @array
end
assert different_arrangements.positive?
end
def test_self_random_pick_is_deterministic
supress_warn_output do
array = Array.new(10) { rand(0..9) }
assert_deterministic { FFaker::ArrayUtils.random_pick(array, 3) }
end
end
def test_self_rand_is_deterministic
supress_warn_output do
array = Array.new(10) { rand(0..9) }
assert_deterministic { FFaker::ArrayUtils.rand(array) }
end
end
def test_self_shuffle_is_deterministic
array = Array.new(10) { rand(0..9) }
assert_deterministic { FFaker::ArrayUtils.shuffle(array) }
end
def test_rand_is_deterministic
supress_warn_output do
assert_deterministic { @array.rand }
end
end
def test_random_pick_is_deterministic
supress_warn_output do
assert_deterministic { @array.random_pick(2) }
end
end
def test_shuffle_is_deterministic
assert_deterministic { @array.shuffle }
end
private
# Supress the deprecation warning that some methods output, so we get less
# noise in our test run.
def supress_warn_output
original_verbosity = $VERBOSE
$VERBOSE = nil
yield
$VERBOSE = original_verbosity
end
end
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