diff options
Diffstat (limited to 'libcxx/test/std/numerics/rand/rand.device')
3 files changed, 143 insertions, 0 deletions
diff --git a/libcxx/test/std/numerics/rand/rand.device/ctor.pass.cpp b/libcxx/test/std/numerics/rand/rand.device/ctor.pass.cpp new file mode 100644 index 00000000000..2d9bc2ff8f1 --- /dev/null +++ b/libcxx/test/std/numerics/rand/rand.device/ctor.pass.cpp @@ -0,0 +1,85 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// <random> + +// class random_device; + +// explicit random_device(const string& token = implementation-defined); + +// For the following ctors, the standard states: "The semantics and default +// value of the token parameter are implementation-defined". Implementations +// therefore aren't required to accept any string, but the default shouldn't +// throw. + +#include <random> +#include <cassert> +#include <unistd.h> + +bool is_valid_random_device(const std::string &token) { +#if defined(_WIN32) + return true; +#elif defined(_LIBCPP_USING_NACL_RANDOM) + return token == "/dev/urandom"; +#else // !defined(_WIN32) && !defined(_LIBCPP_USING_NACL_RANDOM) + // Not an exhaustive list: they're the only tokens that are tested below. + return token == "/dev/urandom" || token == "/dev/random"; +#endif // defined(_WIN32) || defined(_LIBCPP_USING_NACL_RANDOM) +} + +void check_random_device_valid(const std::string &token) { + std::random_device r(token); +} + +void check_random_device_invalid(const std::string &token) { + try { + std::random_device r(token); + assert(false); + } catch (const std::system_error &e) { + } +} + +int main() { + { std::random_device r; } + + { + int ec; + ec = close(STDIN_FILENO); + assert(!ec); + ec = close(STDOUT_FILENO); + assert(!ec); + ec = close(STDERR_FILENO); + assert(!ec); + std::random_device r; + } + + { + std::string token = "wrong file"; + if (is_valid_random_device(token)) + check_random_device_valid(token); + else + check_random_device_invalid(token); + } + + { + std::string token = "/dev/urandom"; + if (is_valid_random_device(token)) + check_random_device_valid(token); + else + check_random_device_invalid(token); + } + + { + std::string token = "/dev/random"; + if (is_valid_random_device(token)) + check_random_device_valid(token); + else + check_random_device_invalid(token); + } +} diff --git a/libcxx/test/std/numerics/rand/rand.device/entropy.pass.cpp b/libcxx/test/std/numerics/rand/rand.device/entropy.pass.cpp new file mode 100644 index 00000000000..f01e5653391 --- /dev/null +++ b/libcxx/test/std/numerics/rand/rand.device/entropy.pass.cpp @@ -0,0 +1,23 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// <random> + +// class random_device; + +// double entropy() const; + +#include <random> +#include <cassert> + +int main() +{ + std::random_device r; + double e = r.entropy(); +} diff --git a/libcxx/test/std/numerics/rand/rand.device/eval.pass.cpp b/libcxx/test/std/numerics/rand/rand.device/eval.pass.cpp new file mode 100644 index 00000000000..72aff076a5d --- /dev/null +++ b/libcxx/test/std/numerics/rand/rand.device/eval.pass.cpp @@ -0,0 +1,35 @@ +//===----------------------------------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// <random> + +// class random_device; + +// result_type operator()(); + +#include <random> +#include <cassert> + +int main() +{ + { + std::random_device r; + std::random_device::result_type e = r(); + } + + try + { + std::random_device r("/dev/null"); + r(); + assert(false); + } + catch (const std::system_error& e) + { + } +} |
