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units-test.C
executable file
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units-test.C
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//
// units-test.C -- UNITS unit tests
//
/*
* Ezpwd Reed-Solomon -- Reed-Solomon encoder / decoder library
*
* Copyright (c) 2022, Dominion Research & Development Corp.
*
* Ezpwd Reed-Solomon is free software: you can redistribute it and/or modify it under the terms of
* the GNU General Public License as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version. See the LICENSE file at the top of the
* source tree. Ezpwd Reed-Solomon is also available under Commercial license. The Djelic BCH code
* under djelic/ and the c++/ezpwd/bch_base wrapper is redistributed under the terms of the GPLv2+,
* regardless of the overall licensing terms.
*
* Ezpwd Reed-Solomon is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*/
#include <ezpwd/units>
#include <ezpwd/cut>
#include <iostream>
#include <algorithm>
#include <string>
#include <fstream>
#include <sstream>
#include <exception>
#include <set>
#include <deque>
#include <map>
#if defined( __GNUC__ )
# define UNUSED __attribute__(( unused ))
#else
# define UNUSED
#endif
#if defined( TESTSTANDALONE )
// Standalone test suite, if TESTSTANDALONE is defined.
namespace cut {
test root( "Root UNITS unit test suite" );
};
int main(
int argc,
char const **argv )
{
// if REQUEST_METHOD environment variable set, assume running as CGI
bool cgi = getenv( "REQUEST_METHOD" );
cut::runner *tests;
if ( cgi )
tests = new cut::htmlrunner( std::cout );
else
tests = new cut::runner( std::cout );
// run returns true iff all test(s) successful
if ( argc > 1 ) { // Named tests specified?
for ( int i = 1; i < argc; ++i ) { // Run each one
std::cout << "running test: " << argv[i] << std::endl;
if ( ! tests->run( argv[i] )) {
return 1;
}
}
} else
return ! tests->run(); // Run all tests
}
#endif // TESTSTANDALONE
#if defined( TEST )
//
// Unit Tests for Units classes
//
namespace cut {
typedef units::type<double> ud_t;
ud_t ud;
ud_t::imperial impd( ud );
ud_t::us usad( ud );
ud_t::binary bind( ud );
typedef units::type<int> ui_t;
// ui_t ui( 1 ); // kg, m, s, etc.
ui_t ui( 100, 1000, 10 ); // decagrams, mm, s, (remaining dimensions are 1 per unit) etc.
ui_t::imperial impi( ui );
ui_t::us usai( ui );
CUT( root, Units_tests, "Basic Units tests" ) {
ud_t::Time t = ud.Second;
t *= 10; // mul/div by scalar sensible
#if ! defined( UNITS_DISABLED )
assert.ISEQUALDELTA( t.scalar(), 10.0, 0.001 );
#endif
t /= 1;
#if ! defined( UNITS_DISABLED )
assert.ISEQUALDELTA( t.scalar(), 10.0, 0.001 );
#endif
t += t; // add/sub in same dimension sensible
#if ! defined( UNITS_DISABLED )
assert.ISEQUALDELTA( t.scalar(), 20.0, 0.001 );
#endif
t -= t / 2;
#if ! defined( UNITS_DISABLED )
assert.ISEQUALDELTA( t.scalar(), 10.0, 0.001 );
#endif
t = - -t;
#if ! defined( UNITS_DISABLED )
assert.ISEQUALDELTA( t.scalar(), 10.0, 0.001 );
#endif
ud_t::Acceleration a = ud.Meter * 10 / ( ud.Second * ud.Second );
ud_t::Velocity v = a * t;
double kph = v / ( ud.Meter * 1000 / ud.Hour );
assert.ISEQUALDELTA( double( kph ), 360.0, 0.001 );
ud_t::Mass m = ud.Kilogram;
ud_t::Force f = m * ud.Gravity; // 1kg at G == approx. 2.2 Pounds
assert.ISEQUALDELTA( double( f / impd.Pound ), double( 2.20462 ), 0.0001 );
ui_t::Mass mi = ui.Kilogram;
ui_t::Force fi = mi * ui.Gravity;
#if ! defined( UNITS_DISABLED )
assert.ISEQUAL( int( mi.scalar() ), 100 );
assert.ISEQUAL( int( fi.scalar() ), 9800 );
assert.ISEQUAL( ui.Gravity.scalar(), 98 );
assert.ISEQUAL( impi.Mile.scalar(), 1609343 );
assert.ISEQUAL( impi.Pound.scalar(), 4448 );
#endif
assert.ISEQUAL( int( fi / impi.Pound ), 2 );
// Test the copy/assign operators from same dimension, different types.
mi = m;
ui_t::Mass mi2( m );
(void)mi2;
}
CUT( Units_tests, Units_Bits, "Data Units tests" ) {
ud_t::Unitless d = bind.Byte * 388;
ud_t::Frequency r = d / ( ud.Second * 10 ); // 388 bytes over 10 seconds
double bps = r / bind.BPS;
assert.ISEQUALDELTA( bps, 310.4, 0.001 );
double mbps = r / bind.MBPS;
assert.ISEQUALPERCENT( mbps, 310.4/1024/1024, 0.001 );
assert.ISEQUALPERCENT( double( r / ( ud.Mega * bind.BPS )), 310.4/1000/1000, 0.001 );
ud_t::Unitless nibble = ud.Count * 4;
assert.ISEQUAL( double( nibble ), 4.0 );
}
CUT( Units_tests, Units_Speed, "Units Speed Test" ) {
// Perform 1M conversions from Acre-Feet / Miles to Miles/Gallon (US and Imperial), and Liters/100KM.
for ( int i = 0; i < 1000000; ++i ) {
const ud_t::Length rod = impd.Mile / 640;
const ud_t::Area acre = rod * impd.Mile;
ud_t::Efficiency afpm = acre * impd.Feet * i / impd.Mile;
double lp100km = afpm / ( ud.Liter / ( ud.Kilo * ud.Meter * 100 ));
assert.ISEQUALPERCENT( lp100km, i * 7.6645e+07, 0.01 );
if ( i ) { // Undefined for denominator 0..
ud_t::Mileage mpaf = ud_t::Unitless( 1 ) / afpm;
double mpg = mpaf / ( impd.Mile / impd.Gallon );
assert.ISEQUALPERCENT( mpg, 3.68558e-06 / i, 0.01 );
mpg = mpaf / ( impd.Mile / usad.Gallon );
assert.ISEQUALPERCENT( mpg, 3.06888e-06 / i, 0.01 );
}
}
}
#if ! defined( UNITS_DISABLED )
CUT( Units_tests, Units_Conversion, "Units conversion" ) {
#if defined( DEBUG )
ui_t::Mass a( ui.Kilogram ); // 1000 g (see above)
assert.ISEQUALPERCENT( double( a / ui.Kilogram ), double( 1.0 ), 0.001 );
assert.ISEQUALPERCENT( double( ( a * 1.49 ) / ui.Kilogram ), double( 1.0 ), 0.001 ); // compiler issues int-double conversion warning (expected)
#endif
ud_t::Mass b( ud.Kilogram ); // 1.0 kg
assert.ISEQUALPERCENT( double( ( b * 1.49 ) / ud.Kilogram ), double( 1.49 ), 0.001 );
#if 0
ud_t::Celsius c( 20 );
assert.ISEQUALDELTA( c.scalar(), 20.0, 0.001 );
ud_t::Temperature k( c );
assert.ISEQUALDELTA( k.scalar(), 20.0, 0.001 );
#endif
// Convert mileage (US Gallons), to MPG (both US and Imperial), and L/100KM.
typedef units::type<float>
sif_t; // SI Units Types, over float
sif_t sif; // SI Constants
sif_t::us usf( sif ); // US/Imperial Constants
sif_t::Mileage mileage = usf.Mile * 10 / usf.Gallon;
float mpg = mileage / usad.MPG;
float eff = sif_t::Unitless( 1 ) / mileage / sif.L_100KM;
assert.ISEQUALDELTA( double( mpg ), 10.0000, 0.001 );
assert.ISEQUALDELTA( double( eff ), 23.5215, 0.001 );
sif_t::imperial imf( sif ); // Imperial Constants
mpg = mileage / imf.MPG;
assert.ISEQUALDELTA( double( mpg ), 12.0095, 0.001 );
}
#endif
}
#endif // TEST