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25 package org.slf4j;
26
27 import static org.junit.Assert.assertTrue;
28
29 import java.io.PrintStream;
30 import java.util.Random;
31
32 import org.junit.After;
33 import org.junit.Before;
34 import org.junit.Test;
35
36 public class OldAPIVersionMismatchAssertionTest {
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38 StringPrintStream sps = new StringPrintStream(System.err);
39 PrintStream old = System.err;
40 int diff = 1024 + new Random().nextInt(10000);
41
42 @Before
43 public void setUp() throws Exception {
44 System.setErr(sps);
45 }
46
47 @After
48 public void tearDown() throws Exception {
49 System.setErr(old);
50 }
51
52 @Test
53 public void test() throws Exception {
54 Logger logger = LoggerFactory.getLogger(this.getClass());
55 String msg = "hello world " + diff;
56 logger.info(msg);
57
58 OutputVerifier.dump(sps);
59
60 String s0 = (String) sps.stringList.get(0);
61 assertTrue(s0.matches("SLF4J: The requested version .* by your slf4j binding is not compatible with.*"));
62
63 String s1 = (String) sps.stringList.get(1);
64 assertTrue(s1.contains(LoggerFactory.VERSION_MISMATCH));
65
66 String s2 = (String) sps.stringList.get(2);
67 assertTrue(s2.contains(msg));
68
69 }
70 }