Turn this into a doctest block

1 files changed, 35 insertions, 7 deletions

diff --git a/docs/hazmat/primitives/asymmetric/serialization.rst b/docs/hazmat/primitives/asymmetric/serialization.rst
index 93bcffd0..5438c249 100644
--- a/docs/hazmat/primitives/asymmetric/serialization.rst
+++ b/docs/hazmat/primitives/asymmetric/serialization.rst
@@ -5,6 +5,33 @@ Key Serialization
 
 .. currentmodule:: cryptography.hazmat.primitives.serialization
 
+.. testsetup::
+
+    pem_data = b"""
+    -----BEGIN RSA PRIVATE KEY-----
+    MIICXgIBAAKBgQDn09PV9KPE7Q+N5K5UtNLT1DLl8z/pKM2pP5tXqWx2OsEw00lC
+    kDHdHESwzS050s/8rtkERKKyusCzCm9+vC1pQzUlmtibfF4PQAQc1pJL6KHqlidg
+    Hw49atYmnC25CaeXt65pAYXoIacOZ8k5X7FW3Eagex8nG0iMw4ObOtg6CwIDAQAB
+    AoGBAL31l/4YYN1rNrSZLrQgGyUSGsbLxJHEKolFon95R3O1fzoH117gkstQb4TE
+    Cwv3jw/JIfBaYUq8tku/AE9D2Jx51x7kYaCuQIMTavKIgkXKfxTQCQDjSEfkvXMW
+    4WOIj5sYdSCNbzLbaeFsWG32bSsBTy/sSheDIlCEFnqDuqwBAkEA+wYfJEMDf5nS
+    VCQd9VKGM4HVeTWBioaWBFCflFdhc1Vb65dsNDp8iIMZgAHC2LEX5dMUmgqXk7AT
+    lwFlIeW4CwJBAOxsSfuIVMuPKyx1xQ6ebpC7zeVxIOdswcM8ain91MSGDdKZw6pF
+    ioFh3kUbKHw4yqqHbdRmUDAJ1mcgGJQOxgECQQCmQaGylKfmhWymyd0FtIip6J4I
+    z4ViyEznwrZOu6kRiEF/QiUqWmpMx/fFrmTsvC5Fy43jkIxgBsiSxRvEXa+NAkB+
+    5m0bhwTEslchKSGZhC6inzuYAQ4BSh4C1mXBnk5bIf0/Ymtk9KiwY8CzZS1o5+7Y
+    c5LfI/+8mTss5UxsBDYBAkEA6NqhcsNWndIJZiWUU4u+RjFUQXqH8WCyJmEDCNxs
+    7SGRS1DTUGX4Y70m9dQpguy6Zg+gpHC+o+ERZR06uEQr+w==
+    -----END RSA PRIVATE KEY-----
+    """.strip()
+    message = b""
+
+    def sign_with_rsa_key(key, message):
+        return b""
+
+    def sign_with_dsa_key(key, message):
+        return b""
+
 There are several common schemes for serializing asymmetric private and public
 keys to bytes. They generally support encryption of private keys and additional
 key metadata.
@@ -14,17 +41,18 @@ and will return an instance of the appropriate type. You should check that
 the returned key matches the type your application expects when using these
 methods.
 
-    .. code-block:: pycon
+    .. doctest::
 
+        >>> from cryptography.hazmat.backends import default_backend
         >>> from cryptography.hazmat.primitives import interfaces
         >>> from cryptography.hazmat.primitives.serialization import load_pem_pkcs8_private_key
-        >>> key = load_pem_pkcs8_private_key(pem_data, password=None, backend=backend)
+        >>> key = load_pem_pkcs8_private_key(pem_data, password=None, backend=default_backend())
         >>> if isinstance(key, interfaces.RSAPrivateKey):
-        >>>     signature = sign_with_rsa_key(key, message)
-        >>> elif isinstance(key, interfaces.DSAPrivateKey):
-        >>>     signature = sign_with_dsa_key(key, message)
-        >>> else:
-        >>>     raise TypeError
+        ...     signature = sign_with_rsa_key(key, message)
+        ... elif isinstance(key, interfaces.DSAPrivateKey):
+        ...     signature = sign_with_dsa_key(key, message)
+        ... else:
+        ...     raise TypeError
 
 
 PKCS #8 Format