Method TestAllocation

util/generic/hash_ut.cpp:938–968

};

void THashTest::TestAllocation() {
    TAllocatorCounters counters;

    using int_set = THashSet<int, THash<int>, TEqualTo<int>, TCountingAllocator<int>>;

    {
        int_set set0(&counters);
        int_set set1(set0);
        set0.clear();
        int_set set2(&counters);
        set2 = set1;
        UNIT_ASSERT_VALUES_EQUAL(counters.Allocations, 0); /* Copying around null sets should not trigger allocations. */

        set0.insert(0);
        UNIT_ASSERT_VALUES_EQUAL(counters.Allocations, 2); /* One for buckets array, one for a new node. */

        set0.clear();
        set1 = set0;
        int_set set3(set0);
        UNIT_ASSERT_VALUES_EQUAL(counters.Allocations, 2); /* Copying from an empty set with allocated buckets should not trigger allocations. */

        for (int i = 0; i < 1000; i++) {
            set0.insert(i);
        }
        size_t allocations = counters.Allocations;
        set0.clear();
        UNIT_ASSERT_VALUES_EQUAL(counters.Allocations, allocations); /* clear() should not trigger allocations. */
    }

    UNIT_ASSERT_VALUES_EQUAL(counters.Allocations, counters.Deallocations);
}

template <int Value>
class TNonCopyableInt {