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.commons.dbutils;
18
19 import static org.junit.Assert.assertTrue;
20
21 import java.util.ServiceLoader;
22
23 import org.apache.commons.dbutils.handlers.columns.TestColumnHandler;
24 import org.apache.commons.dbutils.handlers.properties.TestPropertyHandler;
25 import org.junit.Before;
26 import org.junit.Test;
27
28 public class ServiceLoaderTest {
29 private ServiceLoader<ColumnHandler> columns;
30 private ServiceLoader<PropertyHandler> properties;
31
32 @Before
33 public void setUp() {
34 columns = ServiceLoader.load(ColumnHandler.class);
35 properties = ServiceLoader.load(PropertyHandler.class);
36 }
37
38 /**
39 * Verifying 'more than 1' shows that we found more than we loaded locally which assumes the core handlers
40 * were loaded, too.
41 */
42 @Test
43 public void testFindMoreThanLocalColumns() {
44 int count = 0;
45 for (final ColumnHandler<?> handler : columns) {
46 count++;
47 }
48
49 assertTrue(count > 1);
50 }
51
52 /**
53 * Verifying 'more than 1' shows that we found more than we loaded locally which assumes the core handlers
54 * were loaded, too.
55 */
56 @Test
57 public void testFindMoreThanLocalProperties() {
58 int count = 0;
59 for (final PropertyHandler handler : properties) {
60 count++;
61 }
62
63 assertTrue(count > 1);
64 }
65
66 @Test
67 public void testFindsLocalColumnHandler() {
68 boolean found = false;
69 for (final ColumnHandler<?> handler : columns) {
70 // this class is defined outside of the main classes in dbutils
71 if (handler instanceof TestColumnHandler) {
72 found = true;
73 }
74 }
75
76 assertTrue(found);
77 }
78
79 @Test
80 public void testFindsLocalPropertyHandler() {
81 boolean found = false;
82 for (final PropertyHandler handler : properties) {
83 // this class is defined outside of the main classes in dbutils
84 if (handler instanceof TestPropertyHandler) {
85 found = true;
86 }
87 }
88
89 assertTrue(found);
90 }
91
92 }