kernel/tests: implement platform CIO kapi

1 files changed, 39 insertions, 0 deletions

diff --git a/kernel/tests/src/log_buffer.cpp b/kernel/tests/src/log_buffer.cpp
new file mode 100644
index 0000000..9e30afb
--- /dev/null
+++ b/kernel/tests/src/log_buffer.cpp
@@ -0,0 +1,39 @@
+#include "kernel/tests/log_buffer.hpp"
+
+#include <algorithm>
+#include <string>
+#include <vector>
+
+namespace kernel::tests::log_buffer
+{
+
+  namespace
+  {
+    std::vector<std::string> recorded_messages{};
+  }
+
+  auto append(std::string const & message) -> void
+  {
+    recorded_messages.push_back(message);
+  }
+
+  auto clear() -> void
+  {
+    recorded_messages.clear();
+  }
+
+  auto flat_messages() -> std::string
+  {
+    return std::ranges::fold_left(recorded_messages, std::string{},
+                                  [](std::string accumulator, std::string const & message) {
+                                    accumulator += message;
+                                    return accumulator;
+                                  });
+  }
+
+  auto messages() -> std::vector<std::string> const &
+  {
+    return recorded_messages;
+  }
+
+}  // namespace kernel::tests::log_buffer