1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.dolphinscheduler.common.task;
18
19 import java.lang.reflect.Constructor;
20 import java.lang.reflect.InvocationTargetException;
21 import java.lang.reflect.Method;
22 import java.util.*;
23
24 /**
25 * entity test utils
26 * //该类是一个工具类，可以对传入的任何其他类进行检测，会依次调用类中的所有方法，用了反射机制。
27 */
28 public class EntityTestUtils {
29 //初始化一个用来存储测试用的类型和对应的数值map数组
30 private static final Map<String, Object> OBJECT_MAP = new HashMap<>();
31 //遇到这些方法直接跳过，不测试。
32 private static final String SKIP_METHOD = "getClass,notify,notifyAll,wait,equals,hashCode,clone";
33 String
34 static {
35 //初始化参数数组
36 OBJECT_MAP.put("java.lang.Long", 1L);
37 OBJECT_MAP.put("java.lang.String", "test");
38 OBJECT_MAP.put("java.lang.Integer", 1);
39 OBJECT_MAP.put("int", 1);
40 OBJECT_MAP.put("long", 1L);
41 OBJECT_MAP.put("java.util.Date", new Date());
42 OBJECT_MAP.put("char", '1');
43 OBJECT_MAP.put("java.util.Map", new HashMap());
44 OBJECT_MAP.put("boolean", true);
45 }
46 //传入要测试的类，可以看到，入参是一个Class类型的数组，代表可以同时测试多个类
47 public static void run(List<Class> classList)
48 throws IllegalAccessException, InvocationTargetException, InstantiationException {
49 //一个个来，先取出第一个要测试的Class，比如是String.class
50 for (Class temp : classList) {
51 Object tempInstance = new Object();
52 //获取要测试的类中所有的构造方法，不管是有参构造方法还是无参构造方法，比如String.class中的String()构造方法和String(String original) 等等
53 Constructor[] constructors = temp.getConstructors();
54 //遍历所有的构造方法
55 for (Constructor constructor : constructors) {
56 //获取构造方法的参数类型，如果是无参构造方法，就会进入下面的if，如果是有参构造方法，就会进入下面的else去。
57 final Class<?>[] parameterTypes = constructor.getParameterTypes();
58 //无参构造方法，会进入这里的if
59 if (parameterTypes.length == 0) {
60 //用反射的机制，直接调用了这个无参构造方法，相当于完成了测试
61 tempInstance = constructor.newInstance();
62 } else {
63 //objects中存储的是参数的值，如果构造方法需要传入第一个是int，第二个是String，那么这个objects其实就是传入了（1，‘1’）这两个值
64 Object[] objects = new Object[parameterTypes.length];
65 //这里就是往objects中塞数据
66 for (int i = 0; i < parameterTypes.length; i++) {
67 objects[i] = OBJECT_MAP.get(parameterTypes[i].getName());
68 }
69 //用反射的机制，直接调用了这个有参数的构造方法，相当于完成了测试
70 tempInstance = constructor.newInstance(objects);
71 }
72 }
73 //这里是对类中的普通方法（除了构造方法外的所有其他方法）做测试
74 Method[] methods = temp.getMethods();
75 //遍历所有的普通方法
76 for (final Method method : methods) {
77 //如果是需要跳过不进行测试的方法，那么就直接跳过
78 if (SKIP_METHOD.contains(method.getName())) {
79 break;
80 }
81 //同样也是获取到参数的类型
82 final Class<?>[] parameterTypes = method.getParameterTypes();
83 //如果是有参方法，进入if，无参方法进入else
84 if (parameterTypes.length != 0) {
85 //objects中存储的是参数的值，如果构造方法需要传入第一个是int，第二个是String，那么这个objects其实就是传入了（1，‘1’）这两个值
86 Object[] objects = new Object[parameterTypes.length];
87 //这里就是往objects中塞数据
88 for (int i = 0; i < parameterTypes.length; i++) {
89 objects[i] = OBJECT_MAP.get(parameterTypes[i].getName());
90 }
91 //用反射的机制，直接调用了这个有参数的方法，相当于完成了测试
92 method.invoke(tempInstance, objects);
93 } else {
94 //用反射的机制，直接调用了这个无参的方法，相当于完成了测试
95 method.invoke(tempInstance);
96 }
97 }
98 }
99 }
100 }
以下是DolphinScheduler源码中对这个类进行使用的方式，可以参考：
1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.dolphinscheduler.common.task;
18
19 import org.apache.dolphinscheduler.common.task.sqoop.SqoopParameters;
20 import org.apache.dolphinscheduler.common.task.sqoop.sources.SourceHdfsParameter;
21 import org.apache.dolphinscheduler.common.task.sqoop.sources.SourceHiveParameter;
22 import org.apache.dolphinscheduler.common.task.sqoop.sources.SourceMysqlParameter;
23 import org.apache.dolphinscheduler.common.task.sqoop.targets.TargetHdfsParameter;
24 import org.apache.dolphinscheduler.common.task.sqoop.targets.TargetHiveParameter;
25 import org.apache.dolphinscheduler.common.task.sqoop.targets.TargetMysqlParameter;
26 import org.junit.Assert;
27 import org.junit.Test;
28 import java.util.ArrayList;
29 import java.util.List;
30
31 /**
32 * sqoop parameter entity test
33 */
34 public class SqoopParameterEntityTest {
35
36 @Test
37 public void testEntity(){
38 try {
39 List<Class> classList = new ArrayList<>();
40 classList.add(SourceMysqlParameter.class);
41 classList.add(SourceHiveParameter.class);
42 classList.add(SourceHdfsParameter.class);
43 classList.add(SqoopParameters.class);
44 classList.add(TargetMysqlParameter.class);
45 classList.add(TargetHiveParameter.class);
46 classList.add(TargetHdfsParameter.class);
47 EntityTestUtils.run(classList);
48 } catch (Exception e) {
49 Assert.fail(e.getMessage());
50 }
51 }
52 }
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