Add tests for the Conscrypt based SSLEngine. (#7950)

Motivation:

We currently have only interopt tests for Conscrypt, we should also have non-interopt tests.

Modifications:

Add ConscryptSslEngineTest

Result:

More tests

handler/src/test/java/io/netty/handler/ssl/ConscryptSslEngineTest.java

@@ -0,0 +1,80 @@
+/*
+ * Copyright 2018 The Netty Project
+ *
+ * The Netty Project licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+package io.netty.handler.ssl;
+
+import org.junit.BeforeClass;
+import org.junit.Ignore;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+import java.security.Provider;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+import static org.junit.Assume.assumeTrue;
+
+@RunWith(Parameterized.class)
+public class ConscryptSslEngineTest extends SSLEngineTest {
+
+    @Parameterized.Parameters(name = "{index}: bufferType = {0}")
+    public static Collection<Object> data() {
+        List<Object> params = new ArrayList<Object>();
+        for (BufferType type: BufferType.values()) {
+            params.add(type);
+        }
+        return params;
+    }
+
+    public ConscryptSslEngineTest(BufferType type) {
+        super(type);
+    }
+
+    @BeforeClass
+    public static void checkConscrypt() {
+        assumeTrue(Conscrypt.isAvailable());
+    }
+
+    @Override
+    protected SslProvider sslClientProvider() {
+        return SslProvider.JDK;
+    }
+
+    @Override
+    protected SslProvider sslServerProvider() {
+        return SslProvider.JDK;
+    }
+
+    @Override
+    protected Provider clientSslContextProvider() {
+        return Java8SslTestUtils.conscryptProvider();
+    }
+
+    @Override
+    protected Provider serverSslContextProvider() {
+        return Java8SslTestUtils.conscryptProvider();
+    }
+
+    @Ignore /* Does the JDK support a "max certificate chain length"? */
+    @Override
+    public void testMutualAuthValidClientCertChainTooLongFailOptionalClientAuth() {
+    }
+
+    @Ignore /* Does the JDK support a "max certificate chain length"? */
+    @Override
+    public void testMutualAuthValidClientCertChainTooLongFailRequireClientAuth() {
+    }
+}