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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.size();
62 assertTrue("number of lines should be 3 but was " + lineCount, lineCount == 3);
63
64
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67
68
69 {
70 String s = (String) sps.stringList.get(0);
71 assertTrue(s.contains("SLF4J: slf4j-api 1.6.x (or later) is incompatible with this binding."));
72 }
73 {
74 String s = (String) sps.stringList.get(1);
75 assertTrue(s.contains("SLF4J: Your binding is version 1.5.5 or earlier."));
76 }
77 {
78 String s = (String) sps.stringList.get(2);
79 assertTrue(s.contains("SLF4J: Upgrade your binding to version 1.6.x."));
80 }
81
82 }
83 }