From fa1ea53e6f3dd6b9b5f5f8160776b230184a30bf Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Wed, 1 Apr 2026 09:36:31 +0200
Subject: kernel/tests: implement platform CIO kapi

---
 kernel/tests/src/log_buffer.cpp         | 39 +++++++++++++++++++++++++
 kernel/tests/src/main.cpp               |  4 +++
 kernel/tests/src/test_support.cpp       | 19 ------------
 kernel/tests/src/test_support.tests.cpp | 51 +++++++++++++++++++++++++++++++++
 4 files changed, 94 insertions(+), 19 deletions(-)
 create mode 100644 kernel/tests/src/log_buffer.cpp
 delete mode 100644 kernel/tests/src/test_support.cpp
 create mode 100644 kernel/tests/src/test_support.tests.cpp

(limited to 'kernel/tests/src')

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
diff --git a/kernel/tests/src/main.cpp b/kernel/tests/src/main.cpp
index 89bb1c7..f1f9bb4 100644
--- a/kernel/tests/src/main.cpp
+++ b/kernel/tests/src/main.cpp
@@ -1,6 +1,10 @@
+#include <kapi/cio.hpp>
+
 #include <catch2/catch_session.hpp>
 
 auto main(int argc, char ** argv) -> int
 {
+  kapi::cio::init();
+
   return Catch::Session().run(argc, argv);
 }
\ No newline at end of file
diff --git a/kernel/tests/src/test_support.cpp b/kernel/tests/src/test_support.cpp
deleted file mode 100644
index bbf5dc0..0000000
--- a/kernel/tests/src/test_support.cpp
+++ /dev/null
@@ -1,19 +0,0 @@
-#include "kapi/cpu.hpp"
-
-#include "kernel/tests/cpu.hpp"
-
-#include <catch2/catch_test_macros.hpp>
-
-SCENARIO("Kernel test support infrastructure", "[support]")
-{
-  GIVEN("the test support infrastructure is initialized")
-  {
-    WHEN("when a CPU halt is requested")
-    {
-      THEN("the correct exception is thrown")
-      {
-        REQUIRE_THROWS_AS(kapi::cpu::halt(), kernel::tests::cpu::halt);
-      }
-    }
-  }
-}
\ No newline at end of file
diff --git a/kernel/tests/src/test_support.tests.cpp b/kernel/tests/src/test_support.tests.cpp
new file mode 100644
index 0000000..f835e65
--- /dev/null
+++ b/kernel/tests/src/test_support.tests.cpp
@@ -0,0 +1,51 @@
+#include "kapi/cpu.hpp"
+#include "kapi/system.hpp"
+
+#include "kernel/tests/cpu.hpp"
+#include "kernel/tests/log_buffer.hpp"
+
+#include <kstd/print>
+
+#include <catch2/catch_test_macros.hpp>
+
+SCENARIO("Kernel test support infrastructure", "[support]")
+{
+  GIVEN("the test support infrastructure is initialized")
+  {
+    WHEN("a CPU halt is requested")
+    {
+      THEN("the correct exception is thrown")
+      {
+        REQUIRE_THROWS_AS(kapi::cpu::halt(), kernel::tests::cpu::halt);
+      }
+    }
+
+    WHEN("a the system panics")
+    {
+      kernel::tests::log_buffer::clear();
+
+      THEN("the correct exception is thrown")
+      {
+        REQUIRE_THROWS_AS(kapi::system::panic("[kernel:tests] Test Panic"), kernel::tests::cpu::halt);
+      }
+
+      THEN("the message is appended to the log buffer")
+      {
+        CHECK_THROWS(kapi::system::panic("[kernel:tests] Test Panic"));
+        REQUIRE(kernel::tests::log_buffer::flat_messages().contains("[kernel:tests] Test Panic"));
+      }
+    }
+
+    WHEN("a regular print is issued")
+    {
+      kernel::tests::log_buffer::clear();
+
+      kstd::println("[kernel:tests] Test Print");
+
+      THEN("the message is appended to the log buffer")
+      {
+        REQUIRE(kernel::tests::log_buffer::flat_messages().contains("[kernel:tests] Test Print"));
+      }
+    }
+  }
+}
\ No newline at end of file
-- 
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