tests: Reduce code duplication

tests/test_tls.py

@@ -148,6 +148,10 @@ class _TestBaseConfiguration(Chain):
     def conf(self):
         raise NotImplementedError
 
+    @pytest.fixture
+    def version(self):
+        raise NotImplementedError
+
     @pytest.mark.parametrize("validate", [True, False])
     def test_set_validate_certificates(self, conf, validate):
         conf_ = conf.update(validate_certificates=validate)
@@ -177,6 +181,14 @@ def test_set_inner_protocols(self, conf, inner_protocols):
             NextProtocol(_) for _ in inner_protocols
         )
 
+    def test_lowest_supported_version(self, conf, version):
+        conf_ = conf.update(lowest_supported_version=version)
+        assert conf_.lowest_supported_version is version
+
+    def test_highest_supported_version(self, conf, version):
+        conf_ = conf.update(highest_supported_version=version)
+        assert conf_.highest_supported_version is version
+
     @pytest.mark.parametrize("store", [TrustStore.system()])
     def test_trust_store(self, conf, store):
         conf_ = conf.update(trust_store=store)
@@ -193,31 +205,19 @@ class TestTLSConfiguration(_TestBaseConfiguration):
     def conf(self):
         return TLSConfiguration()
 
-    @pytest.mark.parametrize("version", TLSVersion)
-    def test_lowest_supported_version(self, conf, version):
-        conf_ = conf.update(lowest_supported_version=version)
-        assert conf_.lowest_supported_version is version
-
-    @pytest.mark.parametrize("version", TLSVersion)
-    def test_highest_supported_version(self, conf, version):
-        conf_ = conf.update(highest_supported_version=version)
-        assert conf_.highest_supported_version is version
+    @pytest.fixture(params=TLSVersion)
+    def version(self, request):
+        return request.param
 
 
 class TestDTLSConfiguration(_TestBaseConfiguration):
     @pytest.fixture
     def conf(self):
         return DTLSConfiguration()
 
-    @pytest.mark.parametrize("version", DTLSVersion)
-    def test_lowest_supported_version(self, conf, version):
-        conf_ = conf.update(lowest_supported_version=version)
-        assert conf_.lowest_supported_version is version
-
-    @pytest.mark.parametrize("version", DTLSVersion)
-    def test_highest_supported_version(self, conf, version):
-        conf_ = conf.update(highest_supported_version=version)
-        assert conf_.highest_supported_version is version
+    @pytest.fixture(params=DTLSVersion)
+    def version(self, request):
+        return request.param
 
     @pytest.mark.parametrize("anti_replay", [True, False])
     def test_set_anti_replay(self, conf, anti_replay):