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#include "catch2_common.h"
#include <regex>
#include <tango/internal/utils.h>
namespace
{
const std::string TestExceptReason = "Ahhh!";
const Tango::DevShort k_inital_short = 5678;
using CallbackMockType = TangoTest::CallbackMock<Tango::EventData>;
} // anonymous namespace
template <class Base>
class SimpleEventDevice : public Base
{
public:
using Base::Base;
void init_device() override { }
void push_change_event(Tango::DevString attr)
{
if(!strcmp(attr, "Short_attr"))
{
Base::push_change_event(attr, &short_value);
}
else
{
TANGO_THROW_EXCEPTION(TestExceptReason, "This is a test");
}
}
void read_attribute(Tango::Attribute &att)
{
if(att.get_name() == "Short_attr")
{
att.set_value(&short_value);
}
else
{
TANGO_THROW_EXCEPTION(TestExceptReason, "This is a test");
}
}
static void attribute_factory(std::vector<Tango::Attr *> &attrs)
{
auto short_attr = new TangoTest::AutoAttr<&SimpleEventDevice::read_attribute>("Short_attr", Tango::DEV_SHORT);
short_attr->set_change_event(true, false);
attrs.push_back(short_attr);
}
static void command_factory(std::vector<Tango::Command *> &cmds)
{
cmds.push_back(new TangoTest::AutoCommand<&SimpleEventDevice::push_change_event>("PushChangeEvent"));
}
private:
Tango::DevShort short_value{k_inital_short};
};
/* Returns true if all occurrences of
* Attribute::set_client_lib(N,change)
* in 'input' use the same N
*/
bool checkSameClientLib(const std::string &input)
{
std::regex re(R"(Attribute::set_client_lib\(([0-9]+),change\))");
std::smatch match;
std::string::const_iterator it = input.cbegin();
bool seenFirst = false;
int firstValue = Tango::detail::INVALID_IDL_VERSION;
while(std::regex_search(it, input.cend(), match, re))
{
int val = parse_as<int>(match[1].str());
if(!seenFirst)
{
firstValue = val;
seenFirst = true;
}
else if(val != firstValue)
{
return false;
}
it = match.suffix().first;
}
if(!seenFirst)
{
return false;
}
return true;
}
TANGO_TEST_AUTO_DEV_TMPL_INSTANTIATE(SimpleEventDevice, 4)
SCENARIO("Event re-subscribes with the same IDL", "[slow]")
{
const std::string log_path = TangoTest::get_current_log_file_path();
// the previous full contents across GENERATE
static std::string prev_contents;
int idlver = GENERATE(TangoTest::idlversion(4));
GIVEN("a device proxy to a simple IDLv" << idlver << " device")
{
TangoTest::Context ctx{"event_reconnection", "SimpleEventDevice", idlver};
std::shared_ptr<Tango::DeviceProxy> device = ctx.get_proxy();
REQUIRE(idlver == device->get_idl_version());
AND_GIVEN("an change event subscription to that attribute")
{
TangoTest::CallbackMock<Tango::EventData> callback;
auto event_id = device->subscribe_event("Short_attr", Tango::CHANGE_EVENT, &callback);
auto maybe_event = callback.pop_next_event();
REQUIRE(maybe_event != std::nullopt);
WHEN("when we restart server")
{
ctx.stop_server();
ctx.restart_server();
WHEN("an change event is generated after another error event")
{
using namespace Catch::Matchers;
auto maybe_event = callback.pop_next_event(std::chrono::seconds{20});
REQUIRE(maybe_event != std::nullopt);
REQUIRE(maybe_event->err);
REQUIRE(std::string(Tango::API_EventTimeout) == maybe_event->errors[0].reason.in());
maybe_event = callback.pop_next_event(std::chrono::seconds{20});
REQUIRE(maybe_event != std::nullopt);
REQUIRE(maybe_event->event == Tango::EventName[Tango::CHANGE_EVENT]);
THEN("an change event is generated after another error event")
{
std::string all_server_log = load_file(log_path);
std::string new_chunk;
if(all_server_log.size() > prev_contents.size())
{
new_chunk = all_server_log.substr(prev_contents.size());
}
else
{
// log was truncated or rotated, then treat entire file as new
new_chunk = all_server_log;
}
prev_contents = std::move(all_server_log);
// sanity-check: we should actually have something new
REQUIRE(!new_chunk.empty());
REQUIRE(checkSameClientLib(new_chunk));
std::regex re(R"(zmq_client_idl_to_event_data_version\(([0-9]+),change\))");
std::smatch m;
REQUIRE(std::regex_search(new_chunk, m, re));
int found = parse_as<int>(m[1].str());
CHECK(found == idlver);
}
}
}
device->unsubscribe_event(event_id);
}
}
}
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