Defuse\Crypto\RuntimeTests::runtimeTest PHP Method

    public static function runtimeTest()
    {
        // 0: Tests haven't been run yet.
        // 1: Tests have passed.
        // 2: Tests are running right now.
        // 3: Tests have failed.
        static $test_state = 0;
        if ($test_state === 1 || $test_state === 2) {
            return;
        }
        if ($test_state === 3) {
            /* If an intermittent problem caused a test to fail previously, we
             * want that to be indicated to the user with every call to this
             * library. This way, if the user first does something they really
             * don't care about, and just ignores all exceptions, they won't get
             * screwed when they then start to use the library for something
             * they do care about. */
            throw new Ex\EnvironmentIsBrokenException('Tests failed previously.');
        }
        try {
            $test_state = 2;
            Core::ensureFunctionExists('openssl_get_cipher_methods');
            if (\in_array(Core::CIPHER_METHOD, \openssl_get_cipher_methods()) === false) {
                throw new Ex\EnvironmentIsBrokenException('Cipher method not supported. This is normally caused by an outdated ' . 'version of OpenSSL (and/or OpenSSL compiled for FIPS compliance). ' . 'Please upgrade to a newer version of OpenSSL that supports ' . Core::CIPHER_METHOD . ' to use this library.');
            }
            RuntimeTests::AESTestVector();
            RuntimeTests::HMACTestVector();
            RuntimeTests::HKDFTestVector();
            RuntimeTests::testEncryptDecrypt();
            if (Core::ourStrlen(Key::createNewRandomKey()->getRawBytes()) != Core::KEY_BYTE_SIZE) {
                throw new Ex\EnvironmentIsBrokenException();
            }
            if (Core::ENCRYPTION_INFO_STRING == Core::AUTHENTICATION_INFO_STRING) {
                throw new Ex\EnvironmentIsBrokenException();
            }
        } catch (Ex\EnvironmentIsBrokenException $ex) {
            // Do this, otherwise it will stay in the "tests are running" state.
            $test_state = 3;
            throw $ex;
        }
        // Change this to '0' make the tests always re-run (for benchmarking).
        $test_state = 1;
    }

 public function testRuntimeTest()
 {
     RuntimeTests::runtimeTest();
 }