void test_right_shift_negative_bits_overflows_to_bignum() {
Integer* fix = Fixnum::from(1)->right_shift(state, Fixnum::from(-(FIXNUM_MAX_WIDTH-1)));
TS_ASSERT(kind_of<Fixnum>(fix));
TS_ASSERT_EQUALS(Fixnum::from(1L << (FIXNUM_MAX_WIDTH-1)), fix);
fix = Fixnum::from(-1)->right_shift(state, Fixnum::from(-(FIXNUM_MIN_WIDTH-1)));
TS_ASSERT(kind_of<Fixnum>(fix));
TS_ASSERT_EQUALS(FIXNUM_MIN, fix->to_native());
Integer* max_plus1 = Fixnum::from(1)->right_shift(state, Fixnum::from(-FIXNUM_MAX_WIDTH));
TS_ASSERT(kind_of<Bignum>(max_plus1));
TS_ASSERT_EQUALS(FIXNUM_MAX + 1, max_plus1->to_native());
Integer* min = Fixnum::from(-1)->right_shift(state, Fixnum::from(-FIXNUM_MAX_WIDTH));
TS_ASSERT(kind_of<Fixnum>(min));
TS_ASSERT_EQUALS(FIXNUM_MIN, min->to_native());
Integer* min_minus1 = Bignum::from(state, min->to_native())->sub(state, Fixnum::from(1));
TS_ASSERT(kind_of<Bignum>(min_minus1));
TS_ASSERT_EQUALS(FIXNUM_MIN - 1, min_minus1->to_native());
}
void test_from_unsigned_long() {
Integer* obj = Integer::from(state, (unsigned long)13);
TS_ASSERT_EQUALS(obj->to_native(), (native_int) 13);
obj = Integer::from(state, (unsigned long)2147483647);
TS_ASSERT_EQUALS(obj->to_native(), (native_int)2147483647);
}
void test_from_unsigned_long_long() {
Integer* obj = Integer::from(state, (unsigned long long)13);
TS_ASSERT_EQUALS(obj->to_native(), (native_int) 13);
obj = Integer::from(state, (unsigned long long)-13);
TS_ASSERT_EQUALS(obj->to_native(), (native_int)-13);
obj = Integer::from(state, 9223372036854775808ULL);
TS_ASSERT_EQUALS(as<Bignum>(obj)->to_ulong_long(), 9223372036854775808ULL);
}
void test_from_int() {
Integer* obj = Integer::from(state, (int)13);
TS_ASSERT_EQUALS(obj->to_native(), (native_int) 13);
obj = Integer::from(state, (int)-13);
TS_ASSERT_EQUALS(obj->to_native(), (native_int)-13);
obj = Integer::from(state, (int)2147483647);
TS_ASSERT_EQUALS(obj->to_native(), (native_int)2147483647);
}
void test_neg() {
Fixnum* min = Fixnum::from(FIXNUM_MIN);
Integer* b = min->neg(state);
TS_ASSERT(kind_of<Bignum>(b));
TS_ASSERT_EQUALS(FIXNUM_MAX + 1, b->to_native());
Fixnum* max = Fixnum::from(FIXNUM_MAX);
b = max->neg(state);
TS_ASSERT(kind_of<Fixnum>(b));
TS_ASSERT_EQUALS(FIXNUM_MIN + 1, b->to_native());
TS_ASSERT_EQUALS(Fixnum::from(3)->neg(state), Fixnum::from(-3));
TS_ASSERT_EQUALS(Fixnum::from(-3)->neg(state), Fixnum::from(3));
}
void test_sub_a_bignum() {
Fixnum* one = as<Fixnum>(Fixnum::from(13));
Bignum* obj = Bignum::from(state, (native_int)FIXNUM_MAX + 28);
Integer* res = one->sub(state, obj);
TS_ASSERT(kind_of<Bignum>(res));
TS_ASSERT_EQUALS(res->to_native(), 13 - (FIXNUM_MAX + 28));
}
void test_add_a_bignum() {
Fixnum* one = Fixnum::from(13);
Bignum* obj = Bignum::from(state, (native_int)FIXNUM_MAX - 10);
Integer* res = one->add(state, obj);
TS_ASSERT(kind_of<Bignum>(res));
TS_ASSERT_EQUALS(res->to_native(), FIXNUM_MAX + 3);
}
void test_div_a_bignum() {
Fixnum* one = Fixnum::from(13);
Integer* res = one->div(state, Bignum::from(state, (native_int)FIXNUM_MAX + 10));
TS_ASSERT_EQUALS(res->to_native(), 0);
Bignum* zero = Bignum::from(state, (native_int)0);
TS_ASSERT_THROWS_ASSERT(one->div(state, zero), const RubyException &e,
TS_ASSERT(Exception::zero_division_error_p(state, e.exception)));
}
void test_mul_underflows_to_bignum() {
Fixnum* half = Fixnum::from((FIXNUM_MAX + 1) / 2);
Integer* min = half->mul(state, Fixnum::from(-2));
TS_ASSERT(kind_of<Fixnum>(min));
TS_ASSERT_EQUALS(FIXNUM_MIN, min->to_native());
Integer* min_minus1 = Bignum::from(state, min->to_native())->sub(state, Fixnum::from(1));
TS_ASSERT(kind_of<Bignum>(min_minus1));
TS_ASSERT_EQUALS(FIXNUM_MIN - 1, min_minus1->to_native());
Fixnum* neg_half = as<Fixnum>(Bignum::from(state, FIXNUM_MIN - 1)->div(state, Fixnum::from(2)));
Integer* min_minus2 = neg_half->mul(state, Fixnum::from(2));
TS_ASSERT(kind_of<Bignum>(min_minus2));
TS_ASSERT_EQUALS(FIXNUM_MIN - 2, min_minus2->to_native());
}
void test_delete_inplace() {
Tuple *tuple = new_tuple();
tuple->put(state, 1, Qnil);
Integer *count = tuple->delete_inplace(state, Fixnum::from(0), Fixnum::from(3), Qnil);
TS_ASSERT_EQUALS(1, count->to_native());
TS_ASSERT_EQUALS(Fixnum::from(1), as<Fixnum>(tuple->at(state, 0)));
TS_ASSERT_EQUALS(Fixnum::from(9), as<Fixnum>(tuple->at(state, 1)));
TS_ASSERT_EQUALS(Qnil, tuple->at(state, 2));
}
void test_mul() {
Fixnum* third = Fixnum::from(FIXNUM_MAX / 3);
Integer* a = third->mul(state, Fixnum::from(3));
TS_ASSERT(kind_of<Fixnum>(a));
TS_ASSERT_EQUALS(FIXNUM_MAX, a->to_native());
Integer* min = third->mul(state, Fixnum::from(-3));
TS_ASSERT(kind_of<Fixnum>(min));
TS_ASSERT_EQUALS(FIXNUM_MIN + 1, min->to_native());
Fixnum* neg_third = as<Fixnum>(Fixnum::from((FIXNUM_MIN))->div(state, Fixnum::from(3)));
a = neg_third->mul(state, Fixnum::from(-3));
TS_ASSERT(kind_of<Bignum>(a));
TS_ASSERT_EQUALS(-FIXNUM_MIN + 2, a->to_native());
a = neg_third->mul(state, Fixnum::from(3));
TS_ASSERT(kind_of<Bignum>(a));
TS_ASSERT_EQUALS(FIXNUM_MIN - 2, a->to_native());
}