2 files changed, 37 insertions, 0 deletions
diff --git a/kernel/tests/src/main.cpp b/kernel/tests/src/main.cpp
index c0ec12f..69fd633 100644
--- a/kernel/tests/src/main.cpp
+++ b/kernel/tests/src/main.cpp
@@ -12,6 +12,10 @@ auto main(int argc, char ** argv) -> int
   kapi::interrupts::enable();
 
   kapi::memory::init();
+  // note: no kernel heap is created, since we are in the test environment. Nonetheless, we still initialize the memory
+  // subsystem, so that components that rely on it can be tested. No component must ever rely on the heap allocator
+  // directly, rather they have to go through the new and delete. However, some components may use the frame allocator
+  // and page mapper in order to perform their tasks.
 
   return Catch::Session().run(argc, argv);
 }
diff --git a/kernel/tests/src/simulated_memory.cpp b/kernel/tests/src/simulated_memory.cpp
new file mode 100644
index 0000000..9a9b354
--- /dev/null
+++ b/kernel/tests/src/simulated_memory.cpp
@@ -0,0 +1,33 @@
+#include "kernel/tests/simulated_memory.hpp"
+
+#include <kstd/units>
+
+#include <cstddef>
+#include <vector>
+
+namespace kernel::tests::simulated_memory
+{
+
+  namespace
+  {
+    auto constinit ram_storage = std::vector<std::byte>{};
+    auto constinit pmm_storage = std::vector<std::byte>{};
+  }  // namespace
+
+  auto init(kstd::units::bytes size) -> void
+  {
+    ram_storage.resize(size / kstd::units::bytes{1});
+    pmm_storage.resize(size / kstd::units::bytes{1});
+  }
+
+  auto pmm_metadata_base() -> std::byte *
+  {
+    return pmm_storage.data();
+  }
+
+  auto ram_base() -> std::byte *
+  {
+    return ram_storage.data();
+  }
+
+}  // namespace kernel::tests::simulated_memory
+\ No newline at end of file