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/*
* Created by Phil on 28/04/2011.
* Copyright 2011 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include "catch.hpp"
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Some simple comparisons between doubles",
"[Approx]"
)
{
double d = 1.23;
REQUIRE( d == Approx( 1.23 ) );
REQUIRE( d != Approx( 1.22 ) );
REQUIRE( d != Approx( 1.24 ) );
REQUIRE( Approx( d ) == 1.23 );
REQUIRE( Approx( d ) != 1.22 );
REQUIRE( Approx( d ) != 1.24 );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Approximate comparisons with different epsilons",
"[Approx]"
)
{
double d = 1.23;
REQUIRE( d != Approx( 1.231 ) );
REQUIRE( d == Approx( 1.231 ).epsilon( 0.1 ) );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Less-than inequalities with different epsilons",
"[Approx]"
)
{
double d = 1.23;
REQUIRE( d <= Approx( 1.24 ) );
REQUIRE( d <= Approx( 1.23 ) );
REQUIRE_FALSE( d <= Approx( 1.22 ) );
REQUIRE( d <= Approx( 1.22 ).epsilon(0.1) );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Greater-than inequalities with different epsilons",
"[Approx]"
)
{
double d = 1.23;
REQUIRE( d >= Approx( 1.22 ) );
REQUIRE( d >= Approx( 1.23 ) );
REQUIRE_FALSE( d >= Approx( 1.24 ) );
REQUIRE( d >= Approx( 1.24 ).epsilon(0.1) );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Approximate comparisons with floats",
"[Approx]"
)
{
REQUIRE( 1.23f == Approx( 1.23f ) );
REQUIRE( 0.0f == Approx( 0.0f ) );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Approximate comparisons with ints",
"[Approx]"
)
{
REQUIRE( 1 == Approx( 1 ) );
REQUIRE( 0 == Approx( 0 ) );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Approximate comparisons with mixed numeric types",
"[Approx]"
)
{
const double dZero = 0;
const double dSmall = 0.00001;
const double dMedium = 1.234;
REQUIRE( 1.0f == Approx( 1 ) );
REQUIRE( 0 == Approx( dZero) );
REQUIRE( 0 == Approx( dSmall ).epsilon( 0.001 ) );
REQUIRE( 1.234f == Approx( dMedium ) );
REQUIRE( dMedium == Approx( 1.234f ) );
}
///////////////////////////////////////////////////////////////////////////////
TEST_CASE
(
"Use a custom approx",
"[Approx][custom]"
)
{
double d = 1.23;
Approx approx = Approx::custom().epsilon( 0.005 );
REQUIRE( d == approx( 1.23 ) );
REQUIRE( d == approx( 1.22 ) );
REQUIRE( d == approx( 1.24 ) );
REQUIRE( d != approx( 1.25 ) );
REQUIRE( approx( d ) == 1.23 );
REQUIRE( approx( d ) == 1.22 );
REQUIRE( approx( d ) == 1.24 );
REQUIRE( approx( d ) != 1.25 );
}
inline double divide( double a, double b ) {
return a/b;
}
TEST_CASE( "Approximate PI", "[Approx][PI]" )
{
REQUIRE( divide( 22, 7 ) == Approx( 3.141 ).epsilon( 0.001 ) );
REQUIRE( divide( 22, 7 ) != Approx( 3.141 ).epsilon( 0.0001 ) );
}
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