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require "spec"
require "random/secure"
describe "Random::Secure" do
it "returns random number from a secure system source" do
Random::Secure.next_u.should be_a(Int::Unsigned)
x = Random::Secure.rand(123456...654321)
x.should be >= 123456
x.should be < 654321
Random::Secure.rand(Int64::MAX // 2).should be <= (Int64::MAX // 2)
end
it "fully fills a large buffer" do
# mostly testing the linux getrandom calls
bytes = Random::Secure.random_bytes(10000)
bytes[9990, 10].should_not eq(Bytes.new(10))
end
it "returns a random integer in range (#8219)" do
{% for type in %w(Int8 UInt8 Int16 UInt16 Int32 UInt32 Int64 UInt64 Int128 UInt128).map(&.id) %}
value = Random::Secure.rand({{type}}::MIN..{{type}}::MAX)
typeof(value).should eq({{type}})
{% end %}
end
end
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