HBASE-26666. Mark unit test ignored. Later we'll delete

hbase-client/src/test/java/org/apache/hadoop/hbase/ipc/TestNettyRpcConnection.java

@@ -0,0 +1,104 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF 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 org.apache.hadoop.hbase.ipc;
+
+import static org.hamcrest.CoreMatchers.instanceOf;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.fail;
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.HashSet;
+import java.util.Set;
+import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.net.Address;
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.testclassification.ClientTests;
+import org.apache.hadoop.hbase.testclassification.SmallTests;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.apache.hbase.thirdparty.com.google.common.io.Closeables;
+
+@Category({ ClientTests.class, SmallTests.class })
+public class TestNettyRpcConnection {
+
+  @ClassRule
+  public static final HBaseClassTestRule CLASS_RULE =
+    HBaseClassTestRule.forClass(TestNettyRpcConnection.class);
+
+  private static final Logger LOG = LoggerFactory.getLogger(TestNettyRpcConnection.class);
+
+  private static NettyRpcClient CLIENT;
+
+  private static NettyRpcConnection CONN;
+
+  @BeforeClass
+  public static void setUp() throws IOException {
+    CLIENT = new NettyRpcClient(HBaseConfiguration.create());
+    CONN = new NettyRpcConnection(CLIENT,
+      new ConnectionId(User.getCurrent(), "test", Address.fromParts("localhost", 1234)));
+  }
+
+  @AfterClass
+  public static void tearDown() throws IOException {
+    Closeables.close(CLIENT, true);
+  }
+
+  @Ignore
+  @Test
+  public void testPrivateMethodExecutedInEventLoop() throws IllegalAccessException {
+    // make sure the test is executed with "-ea"
+    assertThrows(AssertionError.class, () -> {
+      assert false;
+    });
+
+    final Set<String> methodsToCheck = new HashSet<>();
+    methodsToCheck.add("shutdown0");
+    methodsToCheck.add("sendRequest0");
+    methodsToCheck.add("connect");
+
+    for (Method method : NettyRpcConnection.class.getDeclaredMethods()) {
+      if (Modifier.isPrivate(method.getModifiers()) && !method.getName().contains("$")) {
+        if (!methodsToCheck.contains(method.getName())) {
+          LOG.info("skipping {}", method);
+          continue;
+        }
+        LOG.info("checking {}", method);
+        method.setAccessible(true);
+        // all private methods should be called inside the event loop thread, so calling it from
+        // this thread will cause the "assert eventLoop.inEventLoop();" to fail
+        try {
+          // now there is no primitive parameters for the private methods so let's pass null
+          method.invoke(CONN, new Object[method.getParameterCount()]);
+          fail("should fail with AssertionError");
+        } catch (InvocationTargetException e) {
+          assertThat(e.getCause(), instanceOf(AssertionError.class));
+        }
+      }
+    }
+  }
+}