[GitHub] [activemq-artemis] brusdev commented on a change in pull request #3852: NO-JIRA Add AllClassesTest

[GitBox <gi...@apache.org>]

brusdev commented on a change in pull request #3852:
URL: https://github.com/apache/activemq-artemis/pull/3852#discussion_r750016021



##########
File path: tests/unit-tests/src/test/java/org/apache/activemq/artemis/tests/unit/AllClassesTest.java
##########
@@ -0,0 +1,139 @@
+/**
+ * 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
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * 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.activemq.artemis.tests.unit;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.reflect.ClassPath;
+import org.apache.activemq.artemis.tests.util.RandomUtil;
+import org.jboss.logging.Logger;
+import org.junit.Assume;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.mockito.Mockito;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.Parameter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+
+@RunWith(value = Parameterized.class)
+public class AllClassesTest {
+   private static final Logger log = Logger.getLogger(AllClassesTest.class);
+
+   private static ClassLoader classLoader = AllClassesTest.class.getClassLoader();
+
+   @Parameterized.Parameters(name = "classInfo={0}")
+   public static Collection getParameters() {
+      List<Class> parameters = new ArrayList<>();
+      ClassLoader classLoader = AllClassesTest.class.getClassLoader();
+
+      try {
+         ClassPath classPath = ClassPath.from(classLoader);
+         ImmutableSet<ClassPath.ClassInfo> classInfos = classPath.getTopLevelClassesRecursive("org.apache.activemq.artemis");
+
+         for (ClassPath.ClassInfo classInfo : classInfos) {
+            if (!classInfo.getPackageName().contains("tests")) {
+               try {
+                  Class loadedClass = classInfo.load();
+                  if (!loadedClass.isEnum() && !loadedClass.isInterface() && !Modifier.isAbstract(loadedClass.getModifiers())) {
+                     parameters.add(loadedClass);
+                  }
+               } catch (Throwable loadThrowable) {
+                  log.debug("cannot load " + classInfo.getName() + ": " + loadThrowable);
+               }
+            }
+         }
+         return parameters;
+      } catch (Exception e) {
+         log.warn("Exception on loading all classes: " + e);
+      }
+
+      return parameters;
+   }
+
+   private Class targetClass;
+
+   public AllClassesTest(Class targetClass) {
+      this.targetClass = targetClass;
+   }
+
+
+   @Test
+   public void testToString() {
+      Object targetInstance = newInstance(targetClass);
+      Assume.assumeTrue("cannot create " + targetClass.getName(), targetInstance != null);
+
+      try {
+         String targetOutput = targetInstance.toString();
+         log.debug("targetOutput: " + targetOutput == null ? "null" : targetOutput);
+      } catch (NullPointerException | UnsupportedOperationException ignore) {

Review comment:
       The `newInstance` try to call any constructor of the target classes starting from the one with more parameters to the one with less parameters.




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