1 files changed, 55 insertions, 0 deletions
diff --git a/tests/test_x509_ext.py b/tests/test_x509_ext.py
index ceb11dfe..28ddab87 100644
--- a/tests/test_x509_ext.py
+++ b/tests/test_x509_ext.py
@@ -2280,6 +2280,39 @@ class TestPolicyConstraints(object):
         assert pc != object()
 
 
+@pytest.mark.requires_backend_interface(interface=RSABackend)
+@pytest.mark.requires_backend_interface(interface=X509Backend)
+class TestPolicyConstraintsExtension(object):
+    def test_inhibit_policy_mapping(self, backend):
+        cert = _load_cert(
+            os.path.join("x509", "department-of-state-root.pem"),
+            x509.load_pem_x509_certificate,
+            backend
+        )
+        ext = cert.extensions.get_extension_for_oid(
+            ExtensionOID.POLICY_CONSTRAINTS,
+        )
+        assert ext.critical is True
+
+        assert ext.value == x509.PolicyConstraints(
+            require_explicit_policy=None, inhibit_policy_mapping=0,
+        )
+
+    def test_require_explicit_policy(self, backend):
+        cert = _load_cert(
+            os.path.join("x509", "custom", "policy_constraints_explicit.pem"),
+            x509.load_pem_x509_certificate,
+            backend
+        )
+        ext = cert.extensions.get_extension_for_oid(
+            ExtensionOID.POLICY_CONSTRAINTS
+        )
+        assert ext.critical is True
+        assert ext.value == x509.PolicyConstraints(
+            require_explicit_policy=1, inhibit_policy_mapping=None,
+        )
+
+
 class TestAuthorityInformationAccess(object):
     def test_invalid_descriptions(self):
         with pytest.raises(TypeError):
@@ -2601,6 +2634,28 @@ class TestAuthorityKeyIdentifierExtension(object):
         )
         assert ext.value == aki
 
+    def test_from_issuer_subject_key_identifier(self, backend):
+        issuer_cert = _load_cert(
+            os.path.join("x509", "rapidssl_sha256_ca_g3.pem"),
+            x509.load_pem_x509_certificate,
+            backend
+        )
+        cert = _load_cert(
+            os.path.join("x509", "cryptography.io.pem"),
+            x509.load_pem_x509_certificate,
+            backend
+        )
+        ext = cert.extensions.get_extension_for_oid(
+            ExtensionOID.AUTHORITY_KEY_IDENTIFIER
+        )
+        ski = issuer_cert.extensions.get_extension_for_class(
+            x509.SubjectKeyIdentifier
+        )
+        aki = x509.AuthorityKeyIdentifier.from_issuer_subject_key_identifier(
+            ski
+        )
+        assert ext.value == aki
+
 
 class TestNameConstraints(object):
     def test_ipaddress_wrong_type(self):