Filesystem and CFDP updates

unittests/cfdp/PduSenderMock.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <deque>
+#include <vector>
+
+#include "fsfw/cfdp/handler/PduSenderIF.h"
+
+struct SentPdu {
+  cfdp::PduType pduType;
+  std::optional<cfdp::FileDirective> fileDirective;
+  std::vector<uint8_t> rawPdu;
+};
+
+class PduSenderMock : public cfdp::PduSenderIF {
+ public:
+  ReturnValue_t sendPdu(cfdp::PduType pduType, std::optional<cfdp::FileDirective> fileDirective,
+
+                        const uint8_t* pdu, size_t pduSize) override {
+    SentPdu sentPdu;
+    sentPdu.pduType = pduType;
+    sentPdu.fileDirective = fileDirective;
+    sentPdu.rawPdu = std::vector(pdu, pdu + pduSize);
+    sentPdus.push_back(sentPdu);
+    return returnvalue::OK;
+  }
+
+  std::optional<SentPdu> getNextSentPacket() {
+    if (sentPdus.empty()) {
+      return std::nullopt;
+    }
+    SentPdu nextPdu = sentPdus.front();
+    sentPdus.pop_front();
+    return nextPdu;
+  }
+
+  std::deque<SentPdu> sentPdus;
+};