com.bigdata.io.writecache

Class TestWriteCache

java.lang.Object

junit.framework.Assert

junit.framework.TestCase

junit.framework.TestCase2

com.bigdata.io.TestCase3

com.bigdata.io.writecache.TestWriteCache

All Implemented Interfaces:

junit.framework.Test

public class TestWriteCache
extends TestCase3

Test suite for the WriteCache.

Note: This test suite uses the DirectBufferPool to allocate its buffers. This reduces the likelihood that direct buffers will be leaked across the unit tests. The tests are written defensively to release the ByteBuffers back to the DirectBufferPool.

Version:

$Id$

Author:

Bryan Thompson

Nested Class Summary

Nested classes/interfaces inherited from class junit.framework.TestCase2

TestCase2.MyProperties, TestCase2.RandomType

Field Summary

Fields

Modifier and Type	Field and Description
protected Random	r A random number generated - the seed is NOT fixed.

Fields inherited from class junit.framework.TestCase2

_randomType, log

Constructor Summary

Constructors

Constructor and Description
TestWriteCache()
TestWriteCache(String name)

Method Summary

Methods

Modifier and Type	Method and Description
ByteBuffer	getRandomData() Returns random data that will fit in N bytes.
ByteBuffer	getRandomData(int nbytes) Returns random data that will fit in nbytes.
void	test_writeCache01() Exercises most of the API.
void	test_writeCacheChecksums() Confirm checksum errors
void	test_writeCacheScatteredWrites() Similar to writeCache01 but uses the ScatteredWrite.
void	test_writeCacheStressScatteredWrites() Generate large number of scattered writes to force flushing

Methods inherited from class com.bigdata.io.TestCase3

assertCondition, assertCondition, assertEquals, assertEquals, getBytes, getPort, getRandomData, setUp, tearDown

Methods inherited from class junit.framework.TestCase2

assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEquals, assertEqualsWithinUlps, assertSameArray, assertSameArray, assertSameBigDecimal, assertSameBigDecimal, assertSameBigInteger, assertSameBigInteger, assertSameIterator, assertSameIterator, assertSameIteratorAnyOrder, assertSameIteratorAnyOrder, assertSameValue, assertSameValue, assertZeroUlps, assertZeroUlps, fail, getInnerCause, getNormalInt, getProjectBuildPath, getProperties, getRandomObject, getRandomObject, getRandomOrder, getRandomString, getTestInputStream, getTestResource, getTestResource, getUlps, getUlps, isDEBUG, isDEBUG, isINFO, isINFO, isInnerCause, logProperties

Methods inherited from class junit.framework.TestCase

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, countTestCases, createResult, fail, fail, failNotEquals, failNotSame, failSame, format, getName, run, run, runBare, runTest, setName, toString

Methods inherited from class java.lang.Object

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

Field Detail

r

protected final Random r

A random number generated - the seed is NOT fixed.

Constructor Detail

TestWriteCache

public TestWriteCache()

TestWriteCache

public TestWriteCache(String name)

Parameters:

name -

Method Detail

test_writeCacheChecksums

public void test_writeCacheChecksums()

Confirm checksum errors

test_writeCache01

public void test_writeCache01()
                       throws IOException,
                              InterruptedException

Exercises most of the API.

Throws:

IOException

InterruptedException

test_writeCacheScatteredWrites

public void test_writeCacheScatteredWrites()
                                    throws IOException,
                                           InterruptedException

Similar to writeCache01 but uses the ScatteredWrite. It uses the same simple random data but writes on explicit out of order 1K boundaries.

Throws:

IOException

InterruptedException

test_writeCacheStressScatteredWrites

public void test_writeCacheStressScatteredWrites()
                                          throws IOException,
                                                 InterruptedException

Generate large number of scattered writes to force flushing

Throws:

IOException

InterruptedException

getRandomData

public ByteBuffer getRandomData()

Returns random data that will fit in N bytes. N is chosen randomly in 1:256.

Returns:

A new ByteBuffer wrapping a new byte[] of random length and having random contents.

getRandomData

public ByteBuffer getRandomData(int nbytes)

Returns random data that will fit in nbytes.

Overrides:

getRandomData in class TestCase3

Returns:

A new ByteBuffer wrapping a new byte[] having random contents.