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/*******************************************************************\
Module: Unit tests for lazy
Author: Romain Brenguier, romain.brenguier@diffblue.com
\*******************************************************************/
#include <testing-utils/use_catch.h>
#include <util/lazy.h>
SCENARIO("lazyt::from_fun test", "[core][util][lazy]")
{
std::size_t call_counter = 0;
auto length_with_counter = [&call_counter](const std::string &s) {
++call_counter;
return s.length();
};
auto lazy_length =
lazyt<int>::from_fun([&]() { return length_with_counter("foo"); });
REQUIRE(call_counter == 0);
auto result = lazy_length.force();
REQUIRE(call_counter == 1);
REQUIRE(result == 3);
result = lazy_length.force();
REQUIRE(call_counter == 1);
REQUIRE(result == 3);
}
SCENARIO("lazy test", "[core][util][lazy]")
{
std::size_t call_counter = 0;
auto length_with_counter = [&call_counter](const std::string &s) {
++call_counter;
return s.length();
};
lazyt<std::size_t> lazy_length =
lazy([&] { return length_with_counter("foobar"); });
REQUIRE(call_counter == 0);
auto result = lazy_length.force();
REQUIRE(call_counter == 1);
REQUIRE(result == 6);
result = lazy_length.force();
REQUIRE(call_counter == 1);
REQUIRE(result == 6);
}
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