lean2/src/tests/numerics/mpq.cpp

/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved. 
Released under Apache 2.0 license as described in the file LICENSE.

Author: Leonardo de Moura 
*/
#include <iostream>
#include "test.h"
#include "mpq.h"
using namespace lean;

static void tst1() {
    mpq a(2,3), b(4,3);
    b = a / b;
    lean_assert(b == mpq(1,2));
    a = mpq(2);
    a.inv();
    lean_assert(a == b);
    a = -2;
    b = mpq(-1, 2);
    a.inv();
    lean_assert(a == b);
}

static void tst2() {
    mpq a(2,3);
    lean_assert(floor(a) == 0);
    lean_assert(ceil(a) == 1);
    mpq b(-2, 3);
    lean_assert(floor(b) == -1);
    lean_assert(ceil(b) == 0);
    mpq c;
    lean_assert(floor(c) == 0);
    lean_assert(ceil(c) == 0);
    mpq d(3);
    lean_assert(d > 0);
    lean_assert(d.is_pos());
    lean_assert(floor(d) == d);
    lean_assert(ceil(d) == d);
    mpq e(-3);
    lean_assert(e < 0);
    lean_assert(e.is_neg());
    lean_assert(floor(e) == e);
    lean_assert(ceil(e) == e);
}

static void tst3() {
    mpq a("1");
    mpq b(1);
    lean_assert(a == b);
}

static void tst4() {
    mpq a(8,6);
    lean_assert(a == mpq(4,3));
    lean_assert(mpq(1,2)+mpq(1,2) == mpq(1));
    lean_assert(mpq("1/2") < mpq("2/3"));
    lean_assert(mpq(-1,2).is_neg());
    lean_assert(mpq(-1,2).is_nonpos());
    lean_assert(!mpq(-1,2).is_zero());
    lean_assert(mpq(1,2) > mpq());
    lean_assert(mpq().is_zero());
    lean_assert(mpq(2,3) + mpq(4,3) == mpq(2));
    lean_assert(mpq(1,2) >= mpq(1,3));
    lean_assert(mpq(3,4).get_denominator() == 4);
    lean_assert(mpq(3,4).get_numerator() == 3);
    lean_assert(mpq(1,2) / mpq(5,4) == mpq(2,5));
    lean_assert(mpq(1,2) - mpq(2,3) == mpq(-1,6));
    lean_assert(mpq(3,4) * mpq(2,3) == mpq(1,2));
    a *= 3;
    lean_assert(a == 4);
    a /= 2;
    lean_assert(a == 2);
    lean_assert(a.is_integer());
    a /= 5;
    lean_assert(a == mpq(2,5));
    lean_assert(!a.is_integer());
    mpq b(3,7);
    a *= b;
    lean_assert(a == mpq(6,35));
    a /= b;
    lean_assert(a == mpq(2,5));
    mpz c(5);
    a *= c;
    lean_assert(a == 2);
    a += c;
    lean_assert(a == 7);
    a -= c;
    lean_assert(a == 2);
    a /= c;
    lean_assert(a == mpq(2,5));
}

int main() {
    continue_on_violation(true);
    tst1();
    tst2();
    tst3();
    tst4();
    return has_violations() ? 1 : 0;
}