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/***************************************************************************
begin : 2004-06-03
copyright : (C) 2004 by Sebastian Stein
email : seb.kde@hpfsc.de
***************************************************************************/
/***************************************************************************
* *
* This program 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 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
// for BOOST testing
#include <boost/test/unit_test.hpp>
using boost::unit_test_framework::test_suite;
using boost::unit_test_framework::test_case;
// the class to be tested
#include "ratio.h"
class ratio_test
{
public:
// constructor
ratio_test()
{
}
/** test the constructor of class ratio */
void test_constructor()
{
// check basic initialisation
ratio * ratio_a = new ratio();
BOOST_REQUIRE(ratio_a->numerator() == 0);
BOOST_REQUIRE(ratio_a->denominator() == 1);
// a denominator with value 0 is never allowed
ratio * ratio_b = new ratio(2, 0);
BOOST_REQUIRE(ratio_b->numerator() == 2);
BOOST_REQUIRE(ratio_b->denominator() == 1); // division by zero not allowed
// a new ratio should always be reduced
ratio * ratio_c = new ratio(2, 4);
BOOST_REQUIRE(ratio_c->numerator() == 1);
BOOST_REQUIRE(ratio_c->denominator() == 2);
// check copy constructor
ratio * ratio_d = new ratio(*ratio_c);
BOOST_REQUIRE(ratio_d->numerator() == 1);
BOOST_REQUIRE(ratio_d->denominator() == 2);
// the copy constructor is not allowed to reduce the new ratio
ratio_d->setNumerator(4, false);
ratio * ratio_e = new ratio(*ratio_d);
BOOST_REQUIRE(ratio_e->numerator() == 4);
BOOST_REQUIRE(ratio_e->denominator() == 2);
delete(ratio_a);
delete(ratio_b);
delete(ratio_c);
delete(ratio_d);
delete(ratio_e);
return;
}
/** test set and get functions */
void test_setAndGet()
{
// check setNumerator() and numerator() (get)
ratio * ratio_a = new ratio();
ratio_a->setNumerator(10);
BOOST_REQUIRE(ratio_a->numerator() == 10);
BOOST_REQUIRE(ratio_a->denominator() == 1);
// check setDenominator() and denominator() (get)
ratio_a->setDenominator(7);
BOOST_REQUIRE(ratio_a->numerator() == 10);
BOOST_REQUIRE(ratio_a->denominator() == 7);
// now check if the ratio gets reduced
ratio_a->setNumerator(14);
BOOST_REQUIRE(ratio_a->numerator() == 2);
BOOST_REQUIRE(ratio_a->denominator() == 1);
// lets do the same, but with out reducing
ratio_a->setNumerator(14, false);
ratio_a->setDenominator(7, false);
BOOST_REQUIRE(ratio_a->numerator() == 14);
BOOST_REQUIRE(ratio_a->denominator() == 7);
// now the = operator
ratio * ratio_b = new ratio();
*ratio_b = *ratio_a;
BOOST_REQUIRE(ratio_b->numerator() == 14);
BOOST_REQUIRE(ratio_b->denominator() == 7);
// make sure we didn't just copied the pointers
BOOST_REQUIRE(ratio_a != ratio_b);
delete(ratio_a);
delete(ratio_b);
return;
}
/** test the = operator */
void test_operatorSet()
{
ratio ratio_a;
ratio_a = 8;
BOOST_REQUIRE(ratio_a.numerator() == 8);
BOOST_REQUIRE(ratio_a.denominator() == 1);
ratio ratio_b(2, 3);
ratio_a = ratio_b;
BOOST_REQUIRE(ratio_a.numerator() == 2);
BOOST_REQUIRE(ratio_a.denominator() == 3);
return;
}
/** test the + and - operator */
void test_operatorAddSub()
{
ratio * ratio_a = new ratio();
ratio_a->setNumerator(4, false);
ratio_a->setDenominator(2, false);
ratio * ratio_b = new ratio();
ratio_b->setNumerator(4, false);
ratio_b->setDenominator(8, false);
// check + operator
ratio ratio_c = *ratio_a + *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 5);
BOOST_REQUIRE(ratio_c.denominator() == 2);
// it should be the same if we change the addends
ratio_c = *ratio_b + *ratio_a;
BOOST_REQUIRE(ratio_c.numerator() == 5);
BOOST_REQUIRE(ratio_c.denominator() == 2);
// check - operator
ratio_c = *ratio_b - *ratio_a;
BOOST_REQUIRE(ratio_c.numerator() == -3);
BOOST_REQUIRE(ratio_c.denominator() == 2);
// it should not be the same if we change the subtrahends
ratio_c = *ratio_a - *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 3);
BOOST_REQUIRE(ratio_c.denominator() == 2);
// now check if we can get 0/1
*ratio_a = *ratio_b;
ratio_c = *ratio_a - *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 0);
BOOST_REQUIRE(ratio_c.denominator() == 1);
delete(ratio_a);
delete(ratio_b);
return;
}
/** test the * and / operator */
void test_operatorMulDiv()
{
ratio * ratio_a = new ratio();
ratio_a->setNumerator(4, false);
ratio_a->setDenominator(2, false);
ratio * ratio_b = new ratio();
ratio_b->setNumerator(4, false);
ratio_b->setDenominator(16, false);
// check * operator
ratio ratio_c = *ratio_a * *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 1);
BOOST_REQUIRE(ratio_c.denominator() == 2);
// it should be the same if we change the addends
ratio_c = *ratio_b * *ratio_a;
BOOST_REQUIRE(ratio_c.numerator() == 1);
BOOST_REQUIRE(ratio_c.denominator() == 2);
// check / operator
ratio_c = *ratio_b / *ratio_a;
BOOST_REQUIRE(ratio_c.numerator() == 1);
BOOST_REQUIRE(ratio_c.denominator() == 8);
// it should not be the same if we change the subtrahends
ratio_c = *ratio_a / *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 8);
BOOST_REQUIRE(ratio_c.denominator() == 1);
// now check if we can get 0/1
*ratio_a = 0;
ratio_c = *ratio_a * *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 0);
BOOST_REQUIRE(ratio_c.denominator() == 1);
ratio_c = *ratio_a / *ratio_b;
BOOST_REQUIRE(ratio_c.numerator() == 0);
BOOST_REQUIRE(ratio_c.denominator() == 1);
delete(ratio_a);
delete(ratio_b);
return;
}
/** test function reziproc() */
void test_reziproc()
{
ratio ratio_a(2, 3);
ratio_a.reziproc();
BOOST_REQUIRE(ratio_a.numerator() == 3);
BOOST_REQUIRE(ratio_a.denominator() == 2);
return;
}
/** test function reduce() */
void test_reduce()
{
ratio ratio_a;
ratio_a.setNumerator(51, false);
ratio_a.setDenominator(17, false);
ratio_a.reduce();
BOOST_REQUIRE(ratio_a.numerator() == 3);
BOOST_REQUIRE(ratio_a.denominator() == 1);
return;
}
/** test operator compare */
void test_operatorCompare()
{
ratio ratio_a(2, 3);
ratio ratio_b(2, 3);
ratio ratio_c(-2, -3);
ratio ratio_d(2, -3);
ratio ratio_e(-2, 3);
BOOST_REQUIRE((ratio_a == ratio_a) == true);
BOOST_REQUIRE((ratio_a == ratio_b) == true);
BOOST_REQUIRE((ratio_a == ratio_c) == true);
BOOST_REQUIRE((ratio_a == ratio_d) == false);
BOOST_REQUIRE((ratio_a == ratio_e) == false);
return;
}
/** test operator smaller */
void test_operatorSmaller()
{
ratio ratio_a(2, 3);
ratio ratio_b(2, 3);
ratio ratio_c(-2, -3);
ratio ratio_d(2, -3);
ratio ratio_e(-2, 3);
BOOST_REQUIRE((ratio_a < ratio_a) == false);
BOOST_REQUIRE((ratio_a < ratio_b) == false);
BOOST_REQUIRE((ratio_a < ratio_c) == false);
BOOST_REQUIRE((ratio_a < ratio_d) == false);
BOOST_REQUIRE((ratio_a < ratio_e) == false);
ratio_a = ratio(-2, 3);
BOOST_REQUIRE((ratio_a < ratio_a) == false);
BOOST_REQUIRE((ratio_a < ratio_b) == true);
BOOST_REQUIRE((ratio_a < ratio_c) == true);
BOOST_REQUIRE((ratio_a < ratio_d) == false);
BOOST_REQUIRE((ratio_a < ratio_e) == false);
BOOST_REQUIRE((ratio(5, 8) < ratio(2, 1)) == true);
return;
}
/** test operator bigger */
void test_operatorBigger()
{
ratio ratio_a(2, 3);
ratio ratio_b(2, 3);
ratio ratio_c(-2, -3);
ratio ratio_d(2, -3);
ratio ratio_e(-2, 3);
ratio ratio_f(-4, 3);
BOOST_REQUIRE((ratio_a > ratio_a) == false);
BOOST_REQUIRE((ratio_a > ratio_b) == false);
BOOST_REQUIRE((ratio_a > ratio_c) == false);
BOOST_REQUIRE((ratio_a > ratio_d) == true);
BOOST_REQUIRE((ratio_a > ratio_e) == true);
BOOST_REQUIRE((ratio_a > ratio_f) == true);
ratio_a = ratio(-2, 3);
BOOST_REQUIRE((ratio_a > ratio_a) == false);
BOOST_REQUIRE((ratio_a > ratio_b) == false);
BOOST_REQUIRE((ratio_a > ratio_c) == false);
BOOST_REQUIRE((ratio_a > ratio_d) == false);
BOOST_REQUIRE((ratio_a > ratio_e) == false);
BOOST_REQUIRE((ratio_a > ratio_f) == true);
return;
}
private:
// instance of primenumber
ratio m_ratio;
};
class ratio_test_suite : public test_suite
{
public:
ratio_test_suite() : test_suite("ratio_test_suite")
{
// create an instance of the test cases class
boost::shared_ptr<ratio_test> instance(new ratio_test());
// create the test cases
test_case* constructor_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_constructor, instance );
test_case* setAndGet_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_setAndGet, instance );
test_case* operatorSet_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_operatorSet, instance );
test_case* operatorAddSub_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_operatorAddSub, instance );
test_case* operatorMulDiv_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_operatorMulDiv, instance );
test_case* reziproc_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_reziproc, instance );
test_case* reduce_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_reduce, instance );
test_case* operatorCompare_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_operatorCompare, instance );
test_case* operatorSmaller_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_operatorSmaller, instance );
test_case* operatorBigger_test_case = BOOST_CLASS_TEST_CASE(
&ratio_test::test_operatorBigger, instance );
// add the test cases to the test suite
add(constructor_test_case);
add(setAndGet_test_case);
add(operatorSet_test_case);
add(operatorAddSub_test_case);
add(operatorMulDiv_test_case);
add(reziproc_test_case);
add(reduce_test_case);
add(operatorCompare_test_case);
add(operatorSmaller_test_case);
add(operatorBigger_test_case);
}
};
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