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require 'test/unit'
require 'random/formatter'
module Random::Formatter
module FormatterTest
def test_random_bytes
assert_equal(16, @it.random_bytes.size)
assert_equal(Encoding::ASCII_8BIT, @it.random_bytes.encoding)
65.times do |idx|
assert_equal(idx, @it.random_bytes(idx).size)
end
end
def test_hex
s = @it.hex
assert_equal(16 * 2, s.size)
assert_match(/\A\h+\z/, s)
33.times do |idx|
s = @it.hex(idx)
assert_equal(idx * 2, s.size)
assert_match(/\A\h*\z/, s)
end
end
def test_hex_encoding
assert_equal(Encoding::US_ASCII, @it.hex.encoding)
end
def test_base64
assert_equal(16, @it.base64.unpack1('m*').size)
17.times do |idx|
assert_equal(idx, @it.base64(idx).unpack1('m*').size)
end
end
def test_urlsafe_base64
safe = /[\n+\/]/
65.times do |idx|
assert_not_match(safe, @it.urlsafe_base64(idx))
end
# base64 can include unsafe byte
assert((0..10000).any? {|idx| safe =~ @it.base64(idx)}, "None of base64(0..10000) is url-safe")
end
def test_random_number_float
101.times do
v = @it.random_number
assert_in_range(0.0...1.0, v)
end
end
def test_random_number_float_by_zero
101.times do
v = @it.random_number(0)
assert_in_range(0.0...1.0, v)
end
end
def test_random_number_int
101.times do |idx|
next if idx.zero?
v = @it.random_number(idx)
assert_in_range(0...idx, v)
end
end
def test_uuid
uuid = @it.uuid
assert_equal(36, uuid.size)
# Check time_hi_and_version and clock_seq_hi_res bits (RFC 4122 4.4)
assert_equal('4', uuid[14])
assert_include(%w'8 9 a b', uuid[19])
assert_match(/\A\h{8}-\h{4}-\h{4}-\h{4}-\h{12}\z/, uuid)
end
def assert_uuid_v7(**opts)
t1 = current_uuid7_time(**opts)
uuid = @it.uuid_v7(**opts)
t3 = current_uuid7_time(**opts)
assert_match(/\A\h{8}-\h{4}-7\h{3}-[89ab]\h{3}-\h{12}\z/, uuid)
t2 = get_uuid7_time(uuid, **opts)
assert_operator(t1, :<=, t2)
assert_operator(t2, :<=, t3)
end
def test_uuid_v7
assert_uuid_v7
0.upto(12) do |extra_timestamp_bits|
assert_uuid_v7 extra_timestamp_bits: extra_timestamp_bits
end
end
# It would be nice to simply use Time#floor here. But that is problematic
# due to the difference between decimal vs binary fractions.
def current_uuid7_time(extra_timestamp_bits: 0)
denominator = (1 << extra_timestamp_bits).to_r
Process.clock_gettime(Process::CLOCK_REALTIME, :nanosecond)
.then {|ns| ((ns / 1_000_000r) * denominator).floor / denominator }
.then {|ms| Time.at(ms / 1000r, in: "+00:00") }
end
def get_uuid7_time(uuid, extra_timestamp_bits: 0)
denominator = (1 << extra_timestamp_bits) * 1000r
extra_chars = extra_timestamp_bits / 4
last_char_bits = extra_timestamp_bits % 4
extra_chars += 1 if last_char_bits != 0
timestamp_re = /\A(\h{8})-(\h{4})-7(\h{#{extra_chars}})/
timestamp_chars = uuid.match(timestamp_re).captures.join
timestamp = timestamp_chars.to_i(16)
timestamp >>= 4 - last_char_bits unless last_char_bits == 0
timestamp /= denominator
Time.at timestamp, in: "+00:00"
end
def test_alphanumeric
65.times do |n|
an = @it.alphanumeric(n)
assert_match(/\A[0-9a-zA-Z]*\z/, an)
assert_equal(n, an.length)
end
end
def test_alphanumeric_chars
[
[[*"0".."9"], /\A\d*\z/],
[[*"a".."t"], /\A[a-t]*\z/],
["一二三四五六七八九十".chars, /\A[一二三四五六七八九十]*\z/],
].each do |chars, pattern|
10.times do |n|
an = @it.alphanumeric(n, chars: chars)
assert_match(pattern, an)
assert_equal(n, an.length)
end
end
end
def assert_in_range(range, result, mesg = nil)
assert(range.cover?(result), build_message(mesg, "Expected #{result} to be in #{range}"))
end
end
module NotDefaultTest
def test_random_number_not_default
msg = "random_number should not be affected by srand"
seed = srand(0)
x = @it.random_number(1000)
10.times do|i|
srand(0)
return unless @it.random_number(1000) == x
end
srand(0)
assert_not_equal(x, @it.random_number(1000), msg)
ensure
srand(seed) if seed
end
end
class TestClassMethods < Test::Unit::TestCase
include FormatterTest
def setup
@it = Random
end
def test_alphanumeric_frozen
assert_predicate @it::Formatter::ALPHANUMERIC, :frozen?
assert @it::Formatter::ALPHANUMERIC.all?(&:frozen?)
end
end
class TestInstanceMethods < Test::Unit::TestCase
include FormatterTest
include NotDefaultTest
def setup
@it = Random.new
end
end
end
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