[Dubbo-1681] add test for dubbo common module

.codecov.yml

@@ -5,4 +5,5 @@ coverage:
       default:
         threshold: 0.1%
 ignore:
-  - "dubbo-demo/.*"
+  - "dubbo-demo/.*"
+  - "dubbo-common/src/main/java/com/alibaba/dubbo/common/json/*.java" #  internal JSON impl is deprecate, ignore test coverage for them

dubbo-common/src/test/java/com/alibaba/dubbo/common/concurrent/ExecutionListTest.java

@@ -0,0 +1,99 @@
+/*
+ * 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 com.alibaba.dubbo.common.concurrent;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+public class ExecutionListTest {
+    private ExecutionList executionList;
+
+    @Before
+    public void setUp() throws Exception {
+        this.executionList = new ExecutionList();
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testAddNullRunnable() {
+        this.executionList.add(null, mock(Executor.class));
+    }
+
+    @Test
+    public void testAddRunnableToExecutor() {
+        Executor mockedExecutor = mock(Executor.class);
+
+        this.executionList.add(mock(Runnable.class), mockedExecutor);
+        this.executionList.execute();
+
+        verify(mockedExecutor).execute(any(Runnable.class));
+    }
+
+    @Test
+    public void testExecuteRunnableWithDefaultExecutor() throws InterruptedException {
+        final CountDownLatch countDownLatch = new CountDownLatch(1);
+        this.executionList.add(new Runnable() {
+            @Override
+            public void run() {
+                countDownLatch.countDown();
+            }
+        }, null);
+
+        this.executionList.execute();
+        countDownLatch.await();
+    }
+
+    @Test
+    public void testExceptionForExecutor() {
+        Executor mockedExecutor = mock(Executor.class);
+        doThrow(new RuntimeException()).when(mockedExecutor).execute(any(Runnable.class));
+
+        this.executionList.add(mock(Runnable.class), mockedExecutor);
+        this.executionList.execute();
+    }
+
+    @Test
+    public void testNotRunSameRunnableTwice() {
+        Executor mockedExecutor = mock(Executor.class);
+
+        this.executionList.add(mock(Runnable.class), mockedExecutor);
+
+        this.executionList.execute();
+        this.executionList.execute();
+
+        verify(mockedExecutor).execute(any(Runnable.class));
+    }
+
+    @Test
+    public void testRunImmediatelyAfterExecuted() {
+        Executor mockedExecutor = mock(Executor.class);
+
+        this.executionList.add(mock(Runnable.class), mockedExecutor);
+        this.executionList.execute();
+        this.executionList.add(mock(Runnable.class), mockedExecutor);
+
+        verify(mockedExecutor, times(2)).execute(any(Runnable.class));
+    }
+}

dubbo-common/src/test/java/com/alibaba/dubbo/common/concurrent/ListenableFutureTaskTest.java

@@ -0,0 +1,100 @@
+/*
+ * 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 com.alibaba.dubbo.common.concurrent;
+
+import org.junit.Test;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executor;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+
+public class ListenableFutureTaskTest {
+    @Test
+    public void testCreate() throws InterruptedException {
+        final CountDownLatch countDownLatch = new CountDownLatch(1);
+        ListenableFutureTask<Boolean> futureTask = ListenableFutureTask.create(new Callable<Boolean>() {
+            @Override
+            public Boolean call() throws Exception {
+                countDownLatch.countDown();
+                return true;
+            }
+        });
+        futureTask.run();
+        countDownLatch.await();
+    }
+
+    @Test
+    public void testRunnableResponse() throws ExecutionException, InterruptedException {
+        ListenableFutureTask<Boolean> futureTask = ListenableFutureTask.create(new Runnable() {
+            @Override
+            public void run() {
+                try {
+                    Thread.sleep(500);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            }
+        }, true);
+        futureTask.run();
+
+        Boolean result = futureTask.get();
+        assertThat(result, is(true));
+    }
+
+    @Test
+    public void testListener() throws InterruptedException {
+        ListenableFutureTask<String> futureTask = ListenableFutureTask.create(new Callable<String>() {
+            @Override
+            public String call() throws Exception {
+                Thread.sleep(500);
+                return "hello";
+            }
+        });
+        final CountDownLatch countDownLatch = new CountDownLatch(1);
+        futureTask.addListener(new Runnable() {
+            @Override
+            public void run() {
+                countDownLatch.countDown();
+            }
+        });
+        futureTask.run();
+        countDownLatch.await();
+    }
+
+
+    @Test
+    public void testCustomExecutor() {
+        Executor mockedExecutor = mock(Executor.class);
+        ListenableFutureTask<Integer> futureTask = ListenableFutureTask.create(new Callable<Integer>() {
+            @Override
+            public Integer call() throws Exception {
+                return 0;
+            }
+        });
+        futureTask.addListener(mock(Runnable.class), mockedExecutor);
+        futureTask.run();
+
+        verify(mockedExecutor).execute(any(Runnable.class));
+    }
+}