1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25 package org.slf4j;
26
27 import java.io.PrintStream;
28 import java.util.Random;
29
30 import junit.framework.TestCase;
31
32 public class MissingSingletonMethodAssertionTest extends TestCase {
33
34 StringPrintStream sps = new StringPrintStream(System.err);
35 PrintStream old = System.err;
36 int diff = 1024 + new Random().nextInt(10000);
37
38 public MissingSingletonMethodAssertionTest(String name) {
39 super(name);
40 }
41
42 protected void setUp() throws Exception {
43 super.setUp();
44 System.setErr(sps);
45 }
46
47 protected void tearDown() throws Exception {
48 super.tearDown();
49 System.setErr(old);
50 }
51
52 public void test() throws Exception {
53 try {
54 Logger logger = LoggerFactory.getLogger(this.getClass());
55 String msg = "hello world " + diff;
56 logger.info(msg);
57 fail("NoSuchMethodError expected");
58 } catch (NoSuchMethodError e) {
59 }
60
61 int lineCount = sps.stringList
62 .size();
63 assertTrue("number of lines should be 3 but was "+lineCount, lineCount == 3);
64
65
66
67
68
69
70
71 {
72 String s = (String) sps.stringList.get(0);
73 assertTrue(s
74 .contains("SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding."));
75 }
76 {
77 String s = (String) sps.stringList.get(1);
78 assertTrue(s.contains("SLF4J: Your binding is version 1.5.5 or earlier."));
79 }
80 {
81 String s = (String) sps.stringList.get(2);
82 assertTrue(s
83 .contains("SLF4J: Upgrade your binding to version 1.6.x."));
84 }
85
86 }
87 }