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# frozen_string_literal: false
require 'test/unit'
require 'securerandom'
require 'tempfile'
# This testcase does NOT aim to test cryptographically strongness and randomness.
class TestSecureRandom < Test::Unit::TestCase
def setup
@it = SecureRandom
end
def test_s_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
# This test took 2 minutes on my machine.
# And 65536 times loop could not be enough for forcing PID recycle.
if false
def test_s_random_bytes_is_fork_safe
begin
require 'openssl'
rescue LoadError
return
end
SecureRandom.random_bytes(8)
pid, v1 = forking_random_bytes
assert(check_forking_random_bytes(pid, v1), 'Process ID not recycled?')
end
def forking_random_bytes
r, w = IO.pipe
pid = fork {
r.close
w.write SecureRandom.random_bytes(8)
w.close
}
w.close
v = r.read(8)
r.close
Process.waitpid2(pid)
[pid, v]
end
def check_forking_random_bytes(target_pid, target)
65536.times do
pid = fork {
if $$ == target_pid
v2 = SecureRandom.random_bytes(8)
if v2 == target
exit(1)
else
exit(2)
end
end
exit(3)
}
pid, status = Process.waitpid2(pid)
case status.exitstatus
when 1
raise 'returned same sequence for same PID'
when 2
return true
end
end
false # not recycled?
end
end
def test_s_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_s_base64
assert_equal(16, @it.base64.unpack('m*')[0].size)
17.times do |idx|
assert_equal(idx, @it.base64(idx).unpack('m*')[0].size)
end
end
def test_s_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_s_random_number_float
101.times do
v = @it.random_number
assert_in_range(0.0...1.0, v)
end
end
def test_s_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_s_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_s_random_number_not_default
msg = "SecureRandom#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
def test_uuid
uuid = @it.uuid
assert_equal(36, uuid.size)
assert_match(/\A\h{8}-\h{4}-\h{4}-\h{4}-\h{12}\z/, uuid)
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 protect
begin
yield
rescue NotImplementedError
# ignore
end
end
def remove_feature(basename)
$LOADED_FEATURES.delete_if { |path|
if File.basename(path) == basename
$LOAD_PATH.any? { |dir|
File.exist?(File.join(dir, basename))
}
end
}
end
def assert_in_range(range, result, mesg = nil)
assert(range.cover?(result), message(mesg) {"Expected #{result} to be in #{range}"})
end
def test_with_openssl
begin
require 'openssl'
rescue LoadError
return
end
assert_equal(Encoding::ASCII_8BIT, @it.send(:gen_random_openssl, 16).encoding)
65.times do |idx|
assert_equal(idx, @it.send(:gen_random_openssl, idx).size)
end
end
end
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