add fs mock feed function

unittests/hal/CMakeLists.txt

@@ -1,2 +1,2 @@
 target_sources(${FSFW_TEST_TGT} PRIVATE testCommandExecutor.cpp
-                                        testHostFilesystem.cpp)
+                                        testHostFilesystem.cpp testFsMock.cpp)

unittests/hal/testFsMock.cpp

@@ -0,0 +1,49 @@
+#include <catch2/catch_test_macros.hpp>
+
+#include "fsfw/serialize/SerializeIF.h"
+#include "mocks/FilesystemMock.h"
+
+using namespace std;
+
+TEST_CASE("Filesystem Mock", "[mocks]") {
+  auto fsMock = FilesystemMock();
+
+  SECTION("Create File") {
+    FilesystemParams params("hello.txt");
+    CHECK(fsMock.createFile(params) == result::OK);
+    auto iter = fsMock.fileMap.find("hello.txt");
+    REQUIRE(iter != fsMock.fileMap.end());
+    FilesystemMock::FileInfo &stats = iter->second;
+    CHECK(stats.fileSegQueue.empty());
+    CHECK(stats.fileRaw.empty());
+  }
+
+  SECTION("Write to File") {
+    std::string testData = "test data";
+    FileOpParams params("hello.txt", testData.size());
+    CHECK(fsMock.writeToFile(params, reinterpret_cast<const uint8_t *>(testData.data())) ==
+          HasReturnvaluesIF::RETURN_OK);
+    auto iter = fsMock.fileMap.find("hello.txt");
+    REQUIRE(iter != fsMock.fileMap.end());
+    FilesystemMock::FileInfo &stats = iter->second;
+    CHECK(not stats.fileSegQueue.empty());
+    CHECK(not stats.fileRaw.empty());
+    auto &segment = stats.fileSegQueue.back();
+    CHECK(segment.offset == 0);
+    CHECK(std::string(reinterpret_cast<const char *>(segment.data.data()), segment.data.size()) ==
+          testData);
+    CHECK(std::string(reinterpret_cast<const char *>(stats.fileRaw.data()), segment.data.size()) ==
+          testData);
+  }
+
+  SECTION("Create Directory") {
+    FilesystemParams params("hello");
+    CHECK(fsMock.createDirectory(params) == result::OK);
+    REQUIRE(not fsMock.dirMap.empty());
+    auto iter = fsMock.dirMap.find("hello");
+    REQUIRE(iter != fsMock.dirMap.end());
+    auto &dirInfo = iter->second;
+    CHECK(dirInfo.createCallCount == 1);
+    CHECK(dirInfo.delCallCount == 0);
+  }
+}