tests: better test initializing allowing for better printing (#5379)

Co-authored-by: Nerixyz <nerixdev@outlook.de>

tests/src/TwitchPubSubClient.cpp

@@ -4,12 +4,12 @@
 #include "providers/twitch/pubsubmessages/AutoMod.hpp"
 #include "providers/twitch/pubsubmessages/Whisper.hpp"
 #include "providers/twitch/TwitchAccount.hpp"
-#include "TestHelpers.hpp"
+#include "Test.hpp"
 
-#include <gtest/gtest.h>
 #include <QString>
 
 #include <chrono>
+#include <mutex>
 #include <optional>
 
 using namespace chatterino;
@@ -33,6 +33,47 @@ using namespace std::chrono_literals;
 
 #ifdef RUN_PUBSUB_TESTS
 
+template <typename T>
+class ReceivedMessage
+{
+    mutable std::mutex mutex;
+
+    bool isSet{false};
+    T t;
+
+public:
+    ReceivedMessage() = default;
+
+    explicit operator bool() const
+    {
+        std::unique_lock lock(this->mutex);
+
+        return this->isSet;
+    }
+
+    ReceivedMessage &operator=(const T &newT)
+    {
+        std::unique_lock lock(this->mutex);
+
+        this->isSet = true;
+        this->t = newT;
+
+        return *this;
+    }
+
+    bool operator==(const T &otherT) const
+    {
+        std::unique_lock lock(this->mutex);
+
+        return this->t == otherT;
+    }
+
+    const T *operator->() const
+    {
+        return &this->t;
+    }
+};
+
 class FTest : public PubSub
 {
 public: