Add tests for FASC-N

tests/test_piv.py

@@ -1,6 +1,8 @@
+from _pytest.config import _assertion_supported
 from ykman.piv import generate_random_management_key, parse_rfc4514_string
 
 from yubikit.core import NotSupportedError, Version
+from yubikit.nist_piv.fascn import FASCNBuilder
 from yubikit.piv import (
     KEY_TYPE,
     MANAGEMENT_KEY_TYPE,
@@ -77,3 +79,39 @@ def test_supported_algorithms(self):
             check_key_support(
                 Version(5, 7, 0), key_type, PIN_POLICY.DEFAULT, TOUCH_POLICY.DEFAULT
             )
+
+    def test_fascn_create(self):
+        fascn = (
+            FASCNBuilder()
+            .agency_code("9999")
+            .system_code("9999")
+            .credential_number("999999")
+            .credential_series("0")
+            .individual_credential_issue("0")
+            .person_identifier("0000000000")
+            .organizational_category("0")
+            .organization_association_category("0")
+            .build()
+        )
+
+        expected = bytearray(
+            b"\xd4\xe79\xdas\x9c\xed9\xces\x9d\x83`\xd8!\x08B\x10\x84!\x08B\x10\x87\xf3"
+        )
+        assert fascn.encode() == expected
+
+    def test_fascn_encode_decode(self):
+        fascn = (
+            FASCNBuilder()
+            .agency_code("9999")
+            .system_code("9999")
+            .credential_number("999999")
+            .credential_series("0")
+            .individual_credential_issue("0")
+            .person_identifier("0000000000")
+            .organizational_category("0")
+            .organization_association_category("0")
+            .build()
+        )
+
+        copy = fascn.decode(fascn.encode())
+        assert fascn == copy