networking: unit tests

Added unit tests for implemented features

Signed-off-by: David Piskula <david.piskula@nxp.com>

Author: dpiskula-nxp

subsys/net/lib/mcp/mcp_server.c

@@ -631,3 +631,15 @@ int mcp_server_remove_tool(const char *tool_name)
 	return 0;
 }
 #endif
+
+#ifdef CONFIG_ZTEST
+uint8_t mcp_server_get_client_count(void)
+{
+	return client_registry.client_count;
+}
+
+uint8_t mcp_server_get_tool_count(void)
+{
+	return tool_registry.tool_count;
+}
+#endif

subsys/net/lib/mcp/mcp_transport.c

@@ -9,8 +9,22 @@
 #include <zephyr/net/mcp/mcp_server.h>
 #include "mcp_transport.h"
 
+#ifdef CONFIG_ZTEST
+int mcp_transport_queue_call_count;
+mcp_response_queue_msg_t mcp_transport_last_queued_msg = {0};
+#endif
+
 int mcp_transport_queue_response(mcp_response_queue_msg_t *msg)
 {
+#ifdef CONFIG_ZTEST
+	/* Store call information for testing */
+	mcp_transport_queue_call_count++;
+	if (msg) {
+		mcp_transport_last_queued_msg.type = msg->type;
+		mcp_transport_last_queued_msg.data = msg->data;
+	}
+#endif
+
 	/* queue msg to the correct requests queue */
 	return 0;
 }

tests/net/lib/mcp/CMakeLists.txt

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(mcp_tests)
+target_sources(app PRIVATE src/main.c)
+
+target_include_directories(app PRIVATE
+    ${ZEPHYR_BASE}/subsys/net/lib/mcp
+    ${ZEPHYR_BASE}/include
+)

tests/net/lib/mcp/prj.conf

@@ -0,0 +1,23 @@
+CONFIG_ZTEST=y
+CONFIG_MCP_SERVER=y
+CONFIG_MCP_TOOLS_CAPABILITY=y
+CONFIG_MCP_MAX_TOOLS=4
+CONFIG_MCP_TOOL_NAME_MAX_LEN=32
+CONFIG_MCP_TOOL_SCHEMA_MAX_LEN=512
+CONFIG_MCP_TOOL_INPUT_ARGS_MAX_LEN=512
+CONFIG_MCP_TOOL_RESULT_MAX_LEN=256
+CONFIG_HTTP_SERVER_MAX_CLIENTS=3
+CONFIG_HTTP_SERVER_MAX_STREAMS=3
+CONFIG_MCP_LOG_LEVEL_DBG=y
+CONFIG_NETWORKING=y
+CONFIG_HTTP_SERVER=y
+CONFIG_JSON_LIBRARY=y
+
+# Enable kernel heap for k_malloc/k_free
+CONFIG_HEAP_MEM_POOL_SIZE=16384
+CONFIG_KERNEL_MEM_POOL=y
+
+# Increase stack sizes to prevent stack overflow
+CONFIG_MAIN_STACK_SIZE=4096
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
+CONFIG_TEST_EXTRA_STACK_SIZE=2048