Function test_emplace_back

tests/misc/containers.cpp:340–348

template<template<typename> class ContainerTemplate>
void test_emplace_back() {
    using Container = ContainerTemplate<TestItem>;
    Container container;
    container.emplace_back(99);

    FL_CHECK(container.size() == 1);
    FL_CHECK(container.back().value == 99);
    FL_CHECK(container.back().copy_count == 0);
}

template<template<typename> class ContainerTemplate>
void test_pop_back() {