RandomDraw_test Class Reference

Description

Test:

Verify a flexible builder for random-value generators; using a config template, these can be outfitted to use a suitable source of randomness and to produce values from a desired target type and limited range.

• for this test, generated result values are ∈ [-2 .. 0 .. +2]
• no actual randomness is used; rather a size_t challenge is sent in to verify precisely deterministic numeric results.

See also

random-draw.hpp

vault::gear::TestChainLoad as usage example

SchedulerStress_test

Definition at line 113 of file random-draw-test.cpp.

Private Member Functions
void	run (Arg)
void	simpleUse ()
void	verify_policy ()
void	verify_numerics ()
void	verify_adaptMapping ()
void	verify_dynamicChange ()

Member Function Documentation

run()

void run ( Arg  )

inlineprivate

Definition at line 118 of file random-draw-test.cpp.

References RandomDraw_test::simpleUse(), RandomDraw_test::verify_adaptMapping(), RandomDraw_test::verify_dynamicChange(), RandomDraw_test::verify_numerics(), and RandomDraw_test::verify_policy().

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simpleUse()

void simpleUse ( )

inlineprivate

Test:

demonstrate a basic usage scenario

Definition at line 133 of file random-draw-test.cpp.

Referenced by RandomDraw_test::run().

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verify_policy()

void verify_policy ( )

inlineprivate

Test:

verify configuration through policy template

• use the default policy, which takes no input values, but rather directly generates a random number; in this case here, input values are ∈ [0 .. 5]
• define another policy template, to produce char values, while always requiring two input data values (char,uint); moreover, define the defaultSrc() directly to produce the raw mapping values (double) using a custom formula; the resulting RandomDraw instance is now a function with two input arguments, producing char values.

Definition at line 165 of file random-draw-test.cpp.

References RandomDraw< POL >::probability().

Referenced by RandomDraw_test::run().

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verify_numerics()

void verify_numerics ( )

inlineprivate

Test:

verify random number transformations.

• use a Draw instance with result values [-2..0..+2]
• values are evenly distributed within limits of quantisation
• the probability parameter controls the amount of neutral results
• maximum and minimum value settings will be respected
• the interval [min..max] is independent from neutral value
• probability defines the cases within [min..max] \ neutral
• all other cases q = 1 - p will yield the neutral value
• implausible max/min settings will be corrected automatically

Definition at line 197 of file random-draw-test.cpp.

Referenced by RandomDraw_test::run().

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verify_adaptMapping()

void verify_adaptMapping ( )

inlineprivate

Test:

bind custom mapping transformation functions.

• use different translation into positional values as input for the actual result value mapping;
• use a mapping function with different arguments, which is wired by the appropriate Adapter from the Policy;
• moreover, the concrete Policy may tap into the context, which is demonstrated here by accessing a global variable. In practice, this capability allows to accept custom types as data source.

Definition at line 609 of file random-draw-test.cpp.

References hash, and VERIFY_ERROR.

Referenced by RandomDraw_test::run().

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verify_dynamicChange()

void verify_dynamicChange ( )

inlineprivate

Test:

change the generation profile dynamically, based on current input; in the example here, the probability is manipulated in each cycle.

Definition at line 743 of file random-draw-test.cpp.

Referenced by RandomDraw_test::run().

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Inheritance diagram for RandomDraw_test:

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The documentation for this class was generated from the following file:

• random-draw-test.cpp