verify successfull TM serialization

unittests/mocks/CdsShortTimestamperMock.h

@@ -0,0 +1,53 @@
+#ifndef FSFW_TESTS_CDSSHORTTIMESTAMPERMOCK_H
+#define FSFW_TESTS_CDSSHORTTIMESTAMPERMOCK_H
+
+#include <array>
+
+#include "fsfw/timemanager/TimeStamperIF.h"
+
+class CdsShortTimestamperMock : public TimeStamperIF {
+ public:
+  unsigned int serializeCallCount = 0;
+  ReturnValue_t lastSerializeResult = HasReturnvaluesIF::RETURN_OK;
+  unsigned int getSizeCallCount = 0;
+  std::array<uint8_t, 7> valueToStamp{};
+
+  CdsShortTimestamperMock() = default;
+
+  explicit CdsShortTimestamperMock(std::array<uint8_t, 7> valueToStamp)
+      : valueToStamp(valueToStamp) {}
+
+  ReturnValue_t serialize(uint8_t **buffer, size_t *size, size_t maxSize,
+                          Endianness streamEndianness) const override {
+    auto &thisNonConst = const_cast<CdsShortTimestamperMock &>(*this);
+    thisNonConst.serializeCallCount += 1;
+    if (*size + getSerializedSize() > maxSize) {
+      thisNonConst.lastSerializeResult = SerializeIF::BUFFER_TOO_SHORT;
+      return lastSerializeResult;
+    }
+    std::copy(valueToStamp.begin(), valueToStamp.end(), *buffer);
+    thisNonConst.lastSerializeResult = HasReturnvaluesIF::RETURN_OK;
+    *buffer += getSerializedSize();
+    *size += getSerializedSize();
+    return lastSerializeResult;
+  }
+  [[nodiscard]] size_t getSerializedSize() const override {
+    auto &thisNonConst = const_cast<CdsShortTimestamperMock &>(*this);
+    thisNonConst.getSizeCallCount += 1;
+    return valueToStamp.size();
+  }
+  ReturnValue_t deSerialize(const uint8_t **buffer, size_t *size,
+                            Endianness streamEndianness) override {
+    return HasReturnvaluesIF::RETURN_FAILED;
+  }
+  [[nodiscard]] size_t getTimestampSize() const override { return getSerializedSize(); }
+  ReturnValue_t addTimeStamp(uint8_t *buffer, uint8_t maxSize) override { return 0; }
+
+  void reset() {
+    serializeCallCount = 0;
+    getSizeCallCount = 0;
+  }
+
+ private:
+};
+#endif  // FSFW_TESTS_CDSSHORTTIMESTAMPERMOCK_H

unittests/tmtcpacket/testPusTcCreator.cpp

@@ -16,6 +16,7 @@ TEST_CASE("PUS TC Creator", "[pus-tc-creator]") {
   size_t serLen = 0;
 
   SECTION("State") {
+    REQUIRE(creator.isTc());
     REQUIRE(creator.getService() == 17);
     REQUIRE(creator.getSubService() == 1);
     REQUIRE(creator.getApid() == 0x02);

unittests/tmtcpacket/testPusTmCreator.cpp

@@ -1,3 +1,65 @@
 #include <catch2/catch_test_macros.hpp>
 
-TEST_CASE("PUS TM Creator", "[pus-tm-creator]") {}
+#include "fsfw/globalfunctions/arrayprinter.h"
+#include "fsfw/tmtcpacket/pus/tm.h"
+#include "fsfw/globalfunctions/CRC.h"
+#include "mocks/CdsShortTimestamperMock.h"
+
+TEST_CASE("PUS TM Creator", "[pus-tm-creator]") {
+  auto packetId = PacketId(ccsds::PacketType::TC, true, 0xef);
+  auto spParams =
+      SpacePacketParams(packetId, PacketSeqCtrl(ccsds::SequenceFlags::UNSEGMENTED, 22), 0x00);
+  auto timeStamper = CdsShortTimestamperMock();
+  auto pusTmParams = PusTmParams(17, 2, &timeStamper);
+  timeStamper.valueToStamp = {1, 2, 3, 4, 5, 6, 7};
+  PusTmCreator creator(spParams, pusTmParams);
+  std::array<uint8_t, 32> buf{};
+  uint8_t* dataPtr = buf.data();
+  size_t serLen = 0;
+
+  SECTION("State") {
+    REQUIRE(creator.isTm());
+    REQUIRE(creator.getApid() == 0xef);
+    REQUIRE(creator.getService() == 17);
+    REQUIRE(creator.getSubService() == 2);
+    REQUIRE(creator.getTimestamper() == &timeStamper);
+    REQUIRE(creator.getSequenceFlags() == ccsds::SequenceFlags::UNSEGMENTED);
+    REQUIRE(creator.getSequenceCount() == 22);
+    // 6 bytes CCSDS header, 7 bytes secondary header, 7 bytes CDS short timestamp,
+    // 0 bytes application data, 2 bytes CRC
+    REQUIRE(creator.getFullPacketLen() == 22);
+    // As specified in standard, the data length fields is the total size of the packet without
+    // the primary header minus 1
+    REQUIRE(creator.getPacketDataLen() == 15);
+    REQUIRE(timeStamper.getSizeCallCount == 1);
+  }
+
+  SECTION("Serialization") {
+    REQUIRE(creator.serialize(&dataPtr, &serLen, buf.size()) == HasReturnvaluesIF::RETURN_OK);
+    REQUIRE(buf[0] == 0x08);
+    REQUIRE(buf[1] == 0xef);
+    // Unsegmented is the default
+    REQUIRE(buf[2] == 0xc0);
+    REQUIRE(buf[3] == 22);
+    REQUIRE(buf[4] == 0);
+    REQUIRE(buf[5] == 15);
+    REQUIRE(((buf[6] >> 4) & 0b1111) == ecss::PusVersion::PUS_C);
+    // SC time reference field
+    REQUIRE((buf[6] & 0b1111) == 0);
+    // Service and subservice field
+    REQUIRE(buf[7] == 17);
+    REQUIRE(buf[8] == 2);
+    // Message Sequence Count
+    REQUIRE(((buf[9] << 8) | buf[10]) == 0);
+    // Destination ID
+    REQUIRE(((buf[11] << 8) | buf[12]) == 0);
+    // Custom timestamp
+    for(size_t i = 1; i < 8; i++) {
+      REQUIRE(buf[12 + i] == i);
+    }
+    REQUIRE(serLen == 22);
+    REQUIRE(CRC::crc16ccitt(buf.data(), serLen) == 0);
+    REQUIRE(buf[20] == 0x03);
+    REQUIRE(buf[21] == 0x79);
+  }
+}