Add tests

1 files changed, 24 insertions, 0 deletions

diff --git a/kernel/kapi/filesystem.tests.cpp b/kernel/kapi/filesystem.tests.cpp
index d1e01db6..2c2a8d1e 100644
--- a/kernel/kapi/filesystem.tests.cpp
+++ b/kernel/kapi/filesystem.tests.cpp
@@ -39,6 +39,30 @@ SCENARIO_METHOD(kernel::tests::filesystem::storage_boot_module_vfs_fixture, "Kap
       REQUIRE(kapi::filesystem::close(fd));
     }
 
+    THEN("files can be opened, written to, read from and closed again")
+    {
+      auto write_fd = kapi::filesystem::open("/information/info_1.txt");
+      REQUIRE(write_fd >= 0);
+
+      auto write_buffer = std::vector<std::byte>{std::byte{'H'}, std::byte{'e'}};
+
+      auto const bytes_written = kapi::filesystem::write(write_fd, write_buffer.data(), write_buffer.size());
+      REQUIRE(bytes_written == 2);
+
+      auto read_fd = kapi::filesystem::open("/information/info_1.txt");
+      REQUIRE(read_fd >= 0);
+
+      auto read_buffer = std::vector<std::byte>(6);
+      auto const bytes_read = kapi::filesystem::read(read_fd, read_buffer.data(), read_buffer.size());
+      REQUIRE(bytes_read >= 0);
+
+      std::string_view buffer_as_str{reinterpret_cast<char *>(read_buffer.data()), static_cast<size_t>(bytes_read)};
+      REQUIRE(buffer_as_str == "Hefo_1");
+
+      REQUIRE(kapi::filesystem::close(write_fd) == 0);
+      REQUIRE(kapi::filesystem::close(read_fd) == 0);
+    }
+
     THEN("files can be opened through absolute symbolic link, read and closed again")
     {
       auto fd = kapi::filesystem::open("/symlinks/information_directory_absolute/info_1.txt").value();