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//
// Copyright (c) 2019-2020 Kris Jusiak (kris at jusiak dot net)
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/ut.hpp>
#include <fstream>
#include <numeric>
#include <streambuf>
#include <string>
template <class T>
class calculator {
public:
auto enter(const T& value) -> void { values_.push_back(value); }
auto add() -> void {
result_ = std::accumulate(std::cbegin(values_), std::cend(values_), T{});
}
auto sub() -> void {
result_ = std::accumulate(std::cbegin(values_) + 1, std::cend(values_),
values_.front(), std::minus{});
}
auto get() const -> T { return result_; }
private:
std::vector<T> values_{};
T result_{};
};
int main(int argc, const char** argv) {
using namespace boost::ut;
bdd::gherkin::steps steps = [](auto& steps) {
steps.feature("Calculator") = [&] {
steps.scenario("*") = [&] {
steps.given("I have calculator") = [&] {
calculator<int> calc{};
steps.when("I enter {value}") = [&](int value) { calc.enter(value); };
steps.when("I press add") = [&] { calc.add(); };
steps.when("I press sub") = [&] { calc.sub(); };
steps.then("I expect {value}") = [&](int result) {
expect(that % calc.get() == result);
};
};
};
};
};
// clang-format off
"Calculator"_test = steps |
R"(
Feature: Calculator
Scenario: Addition
Given I have calculator
When I enter 40
When I enter 2
When I press add
Then I expect 42
Scenario: Subtraction
Given I have calculator
When I enter 4
When I enter 2
When I press sub
Then I expect 2
)";
// clang-format on
if (argc == 2) {
const auto file = [](const auto path) {
std::ifstream file{path};
return std::string{(std::istreambuf_iterator<char>(file)),
std::istreambuf_iterator<char>()};
};
"Calculator"_test = steps | file(argv[1]);
}
}
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