Package eu.simuline.testhelpers

Class DTestHelper

java.lang.Object

eu.simuline.testhelpers.DTestHelper

public abstract class DTestHelper
extends java.lang.Object

Creates double values for tests. Created: Tue Mar 20 01:05:54 2012

Version:

1.0

Author:

Ernst Reissner

Field Summary

Fields

Modifier and Type	Field	Description
private static double	FRAC_NON_NAN
private static int	MAX_NUM_ARGS
private static int	RANGE_POW2

Constructor Summary

Constructors

Constructor	Description
DTestHelper()

Method Summary

Modifier and Type	Method	Description
static double	createArgD(boolean isSigned)
static double	createArgD(boolean isSigned, int exp0, int exp1)	Returns a random number which is signed if demanded by isSigned and which ranges from the given exponents.
static java.util.List<java.lang.Double>	createMultArgsD(boolean signed, boolean inRange, boolean allowsNaN)
static java.util.List<java.lang.Double>	createMultArgsD(int numArgs, boolean allowsSigned, boolean inRange, boolean allowsNaN)
static java.util.List<java.lang.Double>	createMultArgsSumD(boolean signed, boolean inRange)
static java.util.List<java.lang.Double>	createMultArgsSumD(int numArgs, boolean signed, boolean inRange)	Returns a list of numArgs arguments as double values.
private static int	createNumArgs()
private static double	createPower2()
(package private) static double	random(boolean signed)	Returns a random number with absolute value in [0,1].

Methods inherited from class java.lang.Object

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

Field Detail

MAX_NUM_ARGS

private static final int MAX_NUM_ARGS

See Also:

Constant Field Values

FRAC_NON_NAN

private static final double FRAC_NON_NAN

See Also:

Constant Field Values

RANGE_POW2

private static final int RANGE_POW2

See Also:

Constant Field Values

Constructor Detail

DTestHelper

public DTestHelper()

Method Detail

random

static double random(boolean signed)

Returns a random number with absolute value in [0,1].

Parameters:

signed - whether the number returned may be negative.

Returns:

a random number

• in [-1,1] if signed.
• in [ 0,1] if !signed.

createArgD

public static double createArgD(boolean isSigned)

createArgD

public static double createArgD(boolean isSigned,
                                int exp0,
                                int exp1)

Returns a random number which is signed if demanded by isSigned and which ranges from the given exponents.

createMultArgsSumD

public static java.util.List<java.lang.Double> createMultArgsSumD(int numArgs,
                                                                  boolean signed,
                                                                  boolean inRange)

Returns a list of numArgs arguments as double values. The sum of all numbers are restricted as specified by the parameters.

Parameters:

numArgs - the length of the argument list to be returned.

signed - whether the arguments may be negative.

inRange - whether the sum of the entries in the result List is in [0,1) or, if signed in (-1,1).

Returns:

a list of numArgs arguments as double values. The sum of all numbers is in [0,1) and for !signed even in [0.5,1). The entries are in [0,1) for !signed and in (-1,1) for signed.

createNumArgs

private static int createNumArgs()

createMultArgsSumD

public static java.util.List<java.lang.Double> createMultArgsSumD(boolean signed,
                                                                  boolean inRange)

createMultArgsD

public static java.util.List<java.lang.Double> createMultArgsD(int numArgs,
                                                               boolean allowsSigned,
                                                               boolean inRange,
                                                               boolean allowsNaN)

createPower2

private static double createPower2()

createMultArgsD

public static java.util.List<java.lang.Double> createMultArgsD(boolean signed,
                                                               boolean inRange,
                                                               boolean allowsNaN)