Class FakeHostBackend

tests/host/frame_loop_test.cpp:39–70

Backend that reports should_close() true after `close_after` polls, and records the order of calls so the loop's contract can be asserted.

// Backend that reports should_close() true after `close_after` polls, and
// records the order of calls so the loop's contract can be asserted.
class FakeHostBackend final : public HostBackend {
  public:
    explicit FakeHostBackend(int close_after) : close_after_(close_after) {}

    bool initialize(const char*, int, int) override {
        return true;
    }
    void poll_events() override {
        ++polls_;
    }
    [[nodiscard]] bool should_close() const override {
        return polls_ >= close_after_;
    }
    [[nodiscard]] FramebufferSize framebuffer_size() const override {
        return {640, 480};
    }
    void begin_frame() override {
        ++begins_;
    }
    void end_frame() override {
        ++ends_;
    }
    void shutdown() override {
        ++shutdowns_;
    }

    int polls_{0};
    int begins_{0};
    int ends_{0};
    int shutdowns_{0};
    int close_after_;
};

TEST(FrameLoop, TickRendersUntilBackendRequestsClose) {
    FakeHostBackend backend{/*close_after=*/3};