edu.rice.cs.util
Class LogTest

java.lang.Object
  junit.framework.Assert
      junit.framework.TestCase
          edu.rice.cs.drjava.DrJavaTestCase
              edu.rice.cs.drjava.model.MultiThreadedTestCase
                  edu.rice.cs.util.LogTest

All Implemented Interfaces:

Test

public class LogTest
extends MultiThreadedTestCase

Test cases for Log.

Version:

$Id: LogTest.java 5175 2010-01-20 08:46:32Z mgricken $

Nested Class Summary

private static class

LogTest.LogTestThread A thread class that adds a log message after sleeping a given number of milliseconds

Nested classes/interfaces inherited from class junit.framework.TestCase

TestCase.WrappedException

Field Summary

private static int	DELAY
private static int	NUM_THREADS
static int	TOL

Fields inherited from class edu.rice.cs.drjava.model.MultiThreadedTestCase

_testFailed

Constructor Summary

LogTest()

Method Summary

private static String	getStringAfterDate(String s) Returns the string after the date; returns null if there is no date.
void	testConcurrentWrites() Attempts to test Log's behavior when called concurrently from several sources.
void	testExceptionPrinting() Tests the Exception printing methods in the Log file by throwing two exceptions and using the two types of log methods (one with the Throwable itself and the other with the the StackTraceElement[])
void	testLog() Adds a couple of generic messages to a log, and then tests to make sure they are all correct, in the correct order, and their timestamps are within the past few seconds.
private static boolean	withinTolerance(Date earlier, Date time0, Date now) Returns true if time0 is less than 5000 ms earlier than 'earlier', and now is less than 5000 ms earlier than time0.

Methods inherited from class edu.rice.cs.drjava.model.MultiThreadedTestCase

join, listenerFail, listenerFail, setUp, tearDown, wait

Methods inherited from class edu.rice.cs.drjava.DrJavaTestCase

setConfigSetting, setDocText

Methods inherited from class junit.framework.TestCase

countTestCases, createResult, getName, run, run, runBare, runTest, setName, toString

Methods inherited from class junit.framework.Assert

assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertFalse, assertFalse, assertNotNull, assertNotNull, assertNotSame, assertNotSame, assertNull, assertNull, assertSame, assertSame, assertTrue, assertTrue, fail, fail, failNotEquals, failNotSame, failSame, format

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

TOL

public static final int TOL

See Also:

Constant Field Values

NUM_THREADS

private static final int NUM_THREADS

See Also:

Constant Field Values

DELAY

private static final int DELAY

See Also:

Constant Field Values

Constructor Detail

LogTest

public LogTest()

Method Detail

getStringAfterDate

private static String getStringAfterDate(String s)

Returns the string after the date; returns null if there is no date.

withinTolerance

private static boolean withinTolerance(Date earlier,
                                       Date time0,
                                       Date now)

Returns true if time0 is less than 5000 ms earlier than 'earlier', and now is less than 5000 ms earlier than time0. This is necessary because when we parse dates back, the millisecond part gets dropped, so a date later during the same second interval might appear earlier.

testLog

public void testLog()
             throws IOException

Adds a couple of generic messages to a log, and then tests to make sure they are all correct, in the correct order, and their timestamps are within the past few seconds.

Throws:

IOException

testExceptionPrinting

public void testExceptionPrinting()
                           throws IOException

Tests the Exception printing methods in the Log file by throwing two exceptions and using the two types of log methods (one with the Throwable itself and the other with the the StackTraceElement[])

Throws:

IOException

testConcurrentWrites

public void testConcurrentWrites()
                          throws IOException,
                                 InterruptedException

Attempts to test Log's behavior when called concurrently from several sources. Spawns NUM_THREADS LogTestThreads (see above)that wait a random number between 0 and DELAY milliseconds and then log a message. The function tests to make sure that the messages and dates are all intact (if the Log was not handling concurrent requests properly, the entries in the log may be corrupted).

Throws:

IOException

InterruptedException