feat(config):add dynamic loading configuration test case

Author: jwrct

framework/src/main/java/org/tron/core/config/args/DynamicArgs.java

@@ -92,6 +92,7 @@ public void start() {
         }
       } catch (InterruptedException e) {
         logger.warn("WatchService was interrupted");
+        Thread.currentThread().interrupt();
         break;
       } catch (IOException e) {
         logger.error("Exception caught when register the watch key", e.getCause());

framework/src/test/java/org/tron/core/config/args/DynamicArgsTest.java

@@ -0,0 +1,55 @@
+package org.tron.core.config.args;
+
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.tron.common.application.TronApplicationContext;
+import org.tron.common.parameter.CommonParameter;
+import org.tron.common.utils.FileUtil;
+import org.tron.common.utils.ReflectUtils;
+import org.tron.core.Constant;
+import org.tron.core.config.DefaultConfig;
+import org.tron.core.net.TronNetService;
+import org.tron.p2p.P2pConfig;
+
+import java.io.File;
+
+public class DynamicArgsTest {
+  protected TronApplicationContext context;
+  private DynamicArgs dynamicArgs;
+  private String dbPath = "output-dynamic-config-test";
+
+  @Before
+  public void init() {
+    Args.setParam(new String[]{"--output-directory", dbPath},
+        Constant.TEST_CONF);
+    context = new TronApplicationContext(DefaultConfig.class);
+    dynamicArgs = context.getBean(DynamicArgs.class);
+
+  }
+
+  @After
+  public void destroy() {
+    Args.clearParam();
+    context.destroy();
+    FileUtil.deleteDir(new File(dbPath));
+  }
+
+  @Test
+  public void get() {
+    CommonParameter parameter = Args.getInstance();
+    Assert.assertFalse(parameter.isDynamicConfigEnable());
+
+  }
+
+  @Test
+  public void start() {
+    dynamicArgs.start();
+    TronNetService tronNetService = context.getBean(TronNetService.class);
+    ReflectUtils.setFieldValue(tronNetService, "p2pConfig", new P2pConfig());
+    dynamicArgs.reload();
+    dynamicArgs.close();
+    Assert.assertTrue((boolean)ReflectUtils.getFieldObject(dynamicArgs, "shutdown"));
+  }
+}