Issue #13627: Add support for SSL Elliptic Curve-based Diffie-Hellman
key exchange, through the SSLContext.set_ecdh_curve() method and the
ssl.OP_SINGLE_ECDH_USE option.
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index 288b714..505550f 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -99,6 +99,7 @@
         ssl.CERT_OPTIONAL
         ssl.CERT_REQUIRED
         ssl.OP_CIPHER_SERVER_PREFERENCE
+        ssl.OP_SINGLE_ECDH_USE
         self.assertIn(ssl.HAS_SNI, {True, False})
 
     def test_random(self):
@@ -558,6 +559,15 @@
         ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
         ctx.set_default_verify_paths()
 
+    def test_set_ecdh_curve(self):
+        ctx = ssl.SSLContext(ssl.PROTOCOL_TLSv1)
+        ctx.set_ecdh_curve("prime256v1")
+        ctx.set_ecdh_curve(b"prime256v1")
+        self.assertRaises(TypeError, ctx.set_ecdh_curve)
+        self.assertRaises(TypeError, ctx.set_ecdh_curve, None)
+        self.assertRaises(ValueError, ctx.set_ecdh_curve, "foo")
+        self.assertRaises(ValueError, ctx.set_ecdh_curve, b"foo")
+
 
 class NetworkedTests(unittest.TestCase):