2 files changed, 70 insertions, 1 deletions
diff --git a/tests/hazmat/backends/test_openssl.py b/tests/hazmat/backends/test_openssl.py
index 0b55a485..f94b94ab 100644
--- a/tests/hazmat/backends/test_openssl.py
+++ b/tests/hazmat/backends/test_openssl.py
@@ -268,7 +268,8 @@ class TestOpenSSLRandomEngine(object):
             subprocess.check_call(
                 [sys.executable, "-c", engine_printer],
                 env=env,
-                stdout=out
+                stdout=out,
+                stderr=subprocess.PIPE,
             )
 
         osrandom_engine_name = backend._ffi.string(
diff --git a/tests/test_x509_ext.py b/tests/test_x509_ext.py
index d8a5f9de..d85b4bbc 100644
--- a/tests/test_x509_ext.py
+++ b/tests/test_x509_ext.py
@@ -2245,6 +2245,74 @@ class TestAccessDescription(object):
         assert hash(ad) != hash(ad3)
 
 
+class TestPolicyConstraints(object):
+    def test_invalid_explicit_policy(self):
+        with pytest.raises(TypeError):
+            x509.PolicyConstraints("invalid", None)
+
+    def test_invalid_inhibit_policy(self):
+        with pytest.raises(TypeError):
+            x509.PolicyConstraints(None, "invalid")
+
+    def test_both_none(self):
+        with pytest.raises(ValueError):
+            x509.PolicyConstraints(None, None)
+
+    def test_repr(self):
+        pc = x509.PolicyConstraints(0, None)
+
+        assert repr(pc) == (
+            u"<PolicyConstraints(require_explicit_policy=0, inhibit_policy_ma"
+            u"pping=None)>"
+        )
+
+    def test_eq(self):
+        pc = x509.PolicyConstraints(2, 1)
+        pc2 = x509.PolicyConstraints(2, 1)
+        assert pc == pc2
+
+    def test_ne(self):
+        pc = x509.PolicyConstraints(2, 1)
+        pc2 = x509.PolicyConstraints(2, 2)
+        pc3 = x509.PolicyConstraints(3, 1)
+        assert pc != pc2
+        assert pc != pc3
+        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):