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Newsgroups: de.comp.lang.java
Date: Wed, 3 Oct 2018 22:05:15 -0700 (PDT)
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Subject: Re: Bit packed array
From: =?UTF-8?Q?Heiner_K=C3=BCcker?= <mail@heinerkuecker.de>
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Xref: csiph.com de.comp.lang.java:13211

Am Montag, 1. Oktober 2018 09:46:50 UTC+2 schrieb Patrick Roemer:
> Responding to Heiner K=C3=BCcker:
> > http://www.heinerkuecker.de/BitPackedArray.html
>=20
> Da ich zumindest derzeit keinen Bedarf an solcher Funktionalit=C3=A4t hab=
e
> und die Darreichungsform auch eher unbequem finde, habe ich nicht
> reingeschaut. Aber interessieren w=C3=BCrde mich schon...
> ...wie man zu Unit Tests kommt, die tagelang laufen?!

Die Ursache ist die kombinatorische Explosion.

public void testFromArrayCopy_All()
{
	for ( int dataElementWidth =3D 1 ; dataElementWidth < Integer.SIZE ; dataE=
lementWidth++ )
	{
		for ( int arraySize =3D 1 ; arraySize <=3D 37 ; arraySize++ )
		{
			for ( int srcPos =3D 0 ; srcPos < arraySize ; srcPos++ )
			{
				for ( int dstPos =3D 0 ; dstPos < arraySize ; dstPos++ )
				{
					for ( int length =3D 0 ;
						length <=3D arraySize &&=20
						length <=3D arraySize - srcPos &&=20
						length <=3D arraySize - dstPos ;=20
						length++ )
					{
						for ( final int[] thisValues :=20
								new BitPackedIntArrayArraycopyTestValueIterable(=20
									dataElementWidth ,=20
									arraySize ) )
						{
							for ( final int[] fromValues :=20
								new BitPackedIntArrayArraycopyTestValueIterable(=20
									dataElementWidth ,=20
									arraySize ) )
							{


> Viele Gr=C3=BC=C3=9Fe
> Patrick

Danke
Heiner