add basic CCSDS tests

unittests/tmtcpacket/CMakeLists.txt

@@ -5,4 +5,5 @@ target_sources(${FSFW_TEST_TGT} PRIVATE
   testPusTcReader.cpp
   testPusTmCreator.cpp
   testPusTmReader.cpp
+  testCcsds.cpp
 )

unittests/tmtcpacket/testCcsds.cpp

@@ -0,0 +1,53 @@
+#include <array>
+#include <catch2/catch_test_macros.hpp>
+
+#include "fsfw/tmtcpacket/ccsds/PacketId.h"
+#include "fsfw/tmtcpacket/ccsds/header.h"
+
+TEST_CASE("CCSDS Low Level", "[ccsds-ll]") {
+  SECTION("Lowlevel Header Packet ID test") {
+    ccsds::PrimaryHeader header{};
+    uint16_t packetIdRaw = 0x3ff;
+    ccsds::setPacketId(header, packetIdRaw);
+    REQUIRE(header.packetIdHAndVersion == 3);
+    REQUIRE(header.packetIdL == 0xff);
+    REQUIRE(ccsds::getPacketId(header) == 0x3ff);
+    header.packetIdHAndVersion |= 0b00100000;
+    REQUIRE(ccsds::getPacketId(header) == 0x3ff);
+    REQUIRE(ccsds::getVersion(header) == 0b001);
+  }
+
+  SECTION("Lowlevel Header APID Test") {
+    ccsds::PrimaryHeader header{};
+    uint16_t packetIdRaw = 0x3ff;
+    ccsds::setPacketId(header, packetIdRaw);
+    ccsds::setApid(header, 0x1ff);
+    REQUIRE(ccsds::getPacketId(header) == 0x1ff);
+  }
+
+  SECTION("Lowlevel Packet Length Test") {
+    ccsds::PrimaryHeader header{};
+    header.packetLenH = 0x02;
+    header.packetLenL = 0x03;
+    REQUIRE(ccsds::getPacketLen(header) == 0x0203);
+  }
+}
+
+TEST_CASE("CCSDS Packet ID", "[ccsds-packet-id]") {
+  PacketId packetId;
+  std::array<uint8_t, 3> buf{};
+  size_t serLen = 0;
+  uint8_t* ptr = buf.data();
+  SECTION("Basic") {
+    packetId.apid = 0x1ff;
+    packetId.secHeaderFlag = false;
+    packetId.packetType = ccsds::PacketType::TM;
+    REQUIRE(packetId.raw() == 0x1ff);
+    REQUIRE(packetId.serialize(&ptr, &serLen, buf.size(), SerializeIF::Endianness::NETWORK) ==
+            HasReturnvaluesIF::RETURN_OK);
+    REQUIRE(buf[0] == 0x1);
+    REQUIRE(buf[1] == 0xff);
+  }
+}
+
+TEST_CASE("CCSDS Packet Seq Ctrl", "[ccsds-packet-seq-ctrl]") {}