// SPDX-License-Identifier: ISC/* * test_lua_plugin -- verify that Lua plugins load and tools get registered. * Only built at all when lib/'s lua feature is enabled (test/meson.build); * see the clmlua split in lib/meson.build. */#include <errno.h>#include <signal.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/wait.h>#include <unistd.h> #include <cjson/cJSON.h>#include <curl/curl.h>#include <uv.h> #include "clm/clm.h"#include "clm/host_uv.h"#include "clm/internal.h"#include "clm/lua_plugin.h"#include "canned.h" static int failures; #define CHECK(cond, msg)                                                       \	do {                                                                    \		if (!(cond)) {                                                  \			fprintf(stderr, "FAIL: %s (%s:%d)\n", (msg), __FILE__, \			    __LINE__);                                          \			failures++;                                            \		}                                                              \	} while (0) struct pending_host; struct clm_http_call {	struct pending_host *owner;	int active;}; struct clm_timer {	struct pending_host *owner;	clm_timer_cb cb;	void *arg;	uint64_t ms;	int active;}; struct pending_host {	struct clm_http_call http_call;	struct clm_timer timer;	clm_http_success_cb http_success;	clm_http_error_cb http_error;	void *http_user;	clm_timer_cb timer_cb;	void *timer_arg;	int http_cancelled;	int timer_cancelled;}; static intpending_http_post(void *ctx, const struct clm_http_req *req,    clm_http_success_cb success, clm_http_error_cb error,    clm_http_data_cb data, void *user, struct clm_http_call **out){	struct pending_host *pending = ctx; 	(void)req;	(void)data;	pending->http_call.owner = pending;	pending->http_success = success;	pending->http_error = error;	pending->http_user = user;	*out = &pending->http_call;	return 0;} static voidpending_http_cancel(struct clm_http_call *call){	call->owner->http_cancelled++;} static intpending_timer_set(void *ctx, uint64_t ms, clm_timer_cb cb, void *arg,    struct clm_timer **out){	struct pending_host *pending = ctx; 	(void)ms;	pending->timer.owner = pending;	pending->timer_cb = cb;	pending->timer_arg = arg;	*out = &pending->timer;	return 0;} static voidpending_timer_cancel(struct clm_timer *timer){	timer->owner->timer_cancelled++;} static intstart_pending_tool(struct clm_agent *agent, struct pending_host *pending,    const char *name){	clm_http_success_cb completion;	struct clm_http_response response = {0};	char json[512];	void *completion_user;	int r; 	r = clm_agent_submit(agent, "run the pending tool");	if (r < 0 || pending->http_success == NULL)		return r < 0 ? r : -EIO;	completion = pending->http_success;	completion_user = pending->http_user;	(void)snprintf(json, sizeof(json),	    "{\"choices\":[{\"message\":{\"role\":\"assistant\","	    "\"content\":null,\"tool_calls\":[{\"id\":\"pending-1\","	    "\"type\":\"function\",\"function\":{\"name\":\"%s\","	    "\"arguments\":\"{}\"}}]},\"finish_reason\":\"tool_calls\"}]}",	    name);	response.status_code = 200;	response.body = strdup(json);	if (response.body == NULL)		return -ENOMEM;	completion(&response, completion_user);	return 0;} static intpending_setup(struct pending_host *pending, struct clm_host *host,    struct clm_agent **agent, struct clm_lua_env **env){	struct clm_cfg cfg = {		.api_key = "test",		.base_url = "http://pending.invalid/v1/chat/completions",		.provider = CLM_PROVIDER_OPENAI,		.model = "test",		.max_iterations = 1,		.stream = 0,	};	int r; 	memset(host, 0, sizeof(*host));	host->http_post = pending_http_post;	host->http_cancel = pending_http_cancel;	host->timer_set = pending_timer_set;	host->timer_cancel = pending_timer_cancel;	host->ctx = pending;	r = clm_agent_new(&cfg, host, NULL, NULL, agent);	if (r < 0)		return r;	r = clm_lua_env_new(*agent, env);	if (r < 0)		return r;	return clm_lua_load_plugins(*env, "test/plugins_teardown");} static inttest_pending_http_teardown(void){	struct pending_host pending = {0};	struct clm_host host;	struct clm_agent *agent = NULL;	struct clm_lua_env *env = NULL;	clm_http_error_cb late_error;	void *late_user;	int r; 	r = pending_setup(&pending, &host, &agent, &env);	CHECK(r == 0, "pending http setup");	if (r < 0)		return 1;	r = start_pending_tool(agent, &pending, "pending_http");	CHECK(r == 0, "pending http dispatch");	CHECK(pending.http_error != NULL, "pending http request started");	late_error = pending.http_error;	late_user = pending.http_user; 	clm_lua_env_free(env);	CHECK(pending.http_cancelled == 1, "pending http request cancelled");	clm_agent_free(agent);	if (late_error != NULL)		late_error(-ECANCELED, "cancelled", late_user);	return 0;} static inttest_pending_sleep_teardown(void){	struct pending_host pending = {0};	struct clm_host host;	struct clm_agent *agent = NULL;	struct clm_lua_env *env = NULL;	int r; 	r = pending_setup(&pending, &host, &agent, &env);	CHECK(r == 0, "pending sleep setup");	if (r < 0)		return 1;	r = start_pending_tool(agent, &pending, "pending_sleep");	CHECK(r == 0, "pending sleep dispatch");	CHECK(pending.timer_cb != NULL, "pending sleep timer started"); 	clm_lua_env_free(env);	CHECK(pending.timer_cancelled == 1, "pending sleep timer cancelled");	clm_agent_free(agent);	return 0;} static inttest_plugin_loads(void){	struct clm_agent *agent = NULL;	struct clm_lua_env *env = NULL;	uv_loop_t *loop = uv_default_loop();	struct clm_cfg cfg = {		.api_key = "test",		.base_url = "http://127.0.0.1:1/v1/chat/completions",		.provider = CLM_PROVIDER_OPENAI,		.model = "test",		.max_iterations = 1,		.stream = 0,	};	int r; 	struct clm_host *host = NULL;	r = clm_host_uv_new(loop, &host);	CHECK(r == 0, "host creation");	r = clm_agent_new(&cfg, host, NULL, NULL, &agent);	CHECK(r == 0, "agent creation");	if (r != 0)		return 1; 	r = clm_lua_env_new(agent, &env);	CHECK(r == 0, "lua env creation"); 	r = clm_lua_load_plugins(env, "plugins");	CHECK(r == 0, "plugin loading"); 	/* Verify the reverse_string tool was registered. */	int found = 0;	struct clm_tool *rt;	TAILQ_FOREACH(rt, &agent->tools, entries) {		if (strcmp(rt->name, "reverse_string") == 0) {			found = 1;			CHECK(rt->description != NULL, "tool has description");			CHECK(rt->params_schema != NULL, "tool has params_schema");			CHECK(rt->invoke != NULL, "tool has invoke function");			break;		}	}	CHECK(found, "reverse_string tool found in registry"); 	/* Verify the schema is valid JSON. */	if (found) {		TAILQ_FOREACH(rt, &agent->tools, entries) {			if (strcmp(rt->name, "reverse_string") != 0)				continue;			cJSON *schema = cJSON_Parse(rt->params_schema);			CHECK(schema != NULL, "params_schema is valid JSON");			if (schema) {				cJSON *props =				    cJSON_GetObjectItemCaseSensitive(schema, "properties");				CHECK(props != NULL, "schema has properties");				if (props) {					cJSON *text_prop =					    cJSON_GetObjectItemCaseSensitive(props, "text");					CHECK(text_prop != NULL,					    "schema has 'text' property");				}				cJSON_Delete(schema);			}		}	} 	clm_lua_env_free(env);	clm_agent_free(agent);	clm_host_uv_free(host);	return 0;} static inttest_nonexistent_dir(void){	struct clm_agent *agent = NULL;	struct clm_lua_env *env = NULL;	uv_loop_t *loop = uv_default_loop();	struct clm_cfg cfg = {		.api_key = "test",		.base_url = "http://127.0.0.1:1/v1/chat/completions",		.provider = CLM_PROVIDER_OPENAI,		.model = "test",		.max_iterations = 1,		.stream = 0,	};	int r; 	struct clm_host *host = NULL;	r = clm_host_uv_new(loop, &host);	CHECK(r == 0, "host creation");	r = clm_agent_new(&cfg, host, NULL, NULL, &agent);	CHECK(r == 0, "agent creation (nonexistent)");	if (r != 0)		return 1; 	r = clm_lua_env_new(agent, &env);	CHECK(r == 0, "lua env creation (nonexistent)"); 	/* Should succeed gracefully when directory doesn't exist. */	r = clm_lua_load_plugins(env, "/nonexistent/path/to/plugins");	CHECK(r == 0, "nonexistent dir returns 0"); 	clm_lua_env_free(env);	clm_agent_free(agent);	clm_host_uv_free(host);	return 0;} static inttool_registered(struct clm_agent *agent, const char *name){	struct clm_tool *t;	TAILQ_FOREACH(t, &agent->tools, entries)		if (strcmp(t->name, name) == 0)			return 1;	return 0;} /* * Load the self-test plugin dir, which contains one clean plugin plus three * that must fail to load gracefully: an explicit error(), an indirect nil * call, and an infinite loop at file scope (bounded by the load-time CPU cap). * The clean plugin's marker tool must be registered; reaching this point at * all proves the loop plugin did not hang the process. */static inttest_sandbox_and_load_failures(void){	struct clm_agent *agent = NULL;	struct clm_lua_env *env = NULL;	uv_loop_t *loop = uv_default_loop();	struct clm_cfg cfg = {		.api_key = "test",		.base_url = "http://127.0.0.1:1/v1/chat/completions",		.provider = CLM_PROVIDER_OPENAI,		.model = "test",		.max_iterations = 1,		.stream = 0,	};	int r; 	struct clm_host *host = NULL;	r = clm_host_uv_new(loop, &host);	CHECK(r == 0, "host creation");	r = clm_agent_new(&cfg, host, NULL, NULL, &agent);	CHECK(r == 0, "agent creation (sandbox)");	if (r != 0)		return 1; 	r = clm_lua_env_new(agent, &env);	CHECK(r == 0, "lua env creation (sandbox)"); 	/* Returns 0 even though individual plugins fail; failures are skipped.	 * Reaching the next line proves loop_at_load.lua did not hang. */	r = clm_lua_load_plugins(env, "test/plugins");	CHECK(r == 0, "self-test plugin dir loads (failures skipped, no hang)"); 	/* The clean, sandbox-asserting plugin loaded and registered its marker:	 * the sandbox denies os/io/require/load and exposes only safe libs. */	CHECK(tool_registered(agent, "sandbox_ok_marker"),	    "sandbox-clean plugin loaded (no unsafe globals reachable)"); 	/* The failing plugins registered nothing (they raised before/instead of	 * registering); they must not have leaked tools into the registry. */	CHECK(!tool_registered(agent, "fail_explicit_marker"),	    "explicit-error load failure registered no tool");	CHECK(!tool_registered(agent, "fail_indirect_marker"),	    "indirect-error load failure registered no tool");	CHECK(!tool_registered(agent, "loop_marker"),	    "infinite-loop load failure registered no tool"); 	clm_lua_env_free(env);	clm_agent_free(agent);	clm_host_uv_free(host);	return 0;} struct inline_http_host {	struct clm_host host;	struct clm_host *uv_host;	int calls;}; struct inline_http_state {	int done;	int status;	int results;	char content[256];}; static intinline_http_post(void *ctx, const struct clm_http_req *req,    clm_http_success_cb success, clm_http_error_cb error,    clm_http_data_cb data, void *user, struct clm_http_call **out){	struct inline_http_host *host = ctx; 	if (out != NULL)		*out = NULL;	if (strcmp(req->url, "test://inline/success") == 0) {		struct clm_http_response resp = {			.status_code = 200,			.body = strdup("inline body"),		};		host->calls++;		if (resp.body == NULL)			error((int)CURLE_OUT_OF_MEMORY, "curl error: out of memory", user);		else			success(&resp, user);		return 0;	}	if (strcmp(req->url, "test://inline/connect-error") == 0) {		host->calls++;		error((int)CURLE_COULDNT_CONNECT, "curl error: could not connect", user);		return 0;	}	return host->uv_host->http_post(host->uv_host->ctx, req, success, error,	    data, user, out);} static intinline_timer_set(void *ctx, uint64_t ms, clm_timer_cb cb, void *arg,    struct clm_timer **out){	struct inline_http_host *host = ctx; 	return host->uv_host->timer_set(host->uv_host->ctx, ms, cb, arg, out);} static voidinline_on_tool_result(const char *name, const char *content,    enum clm_tool_outcome outcome, void *user){	struct inline_http_state *state = user; 	(void)name;	(void)outcome;	state->results++;	(void)snprintf(state->content, sizeof(state->content), "%s",	    content != NULL ? content : "");} static voidinline_on_turn_done(int status, void *user){	struct inline_http_state *state = user; 	state->done = 1;	state->status = status;} static inttest_inline_http_completion(void){	uv_loop_t loop;	struct canned_server *srv;	struct inline_http_host host = {0};	struct inline_http_state state = {0};	struct clm_agent *agent = NULL;	struct clm_lua_env *env = NULL;	struct clm_callbacks callbacks = {		.on_tool_result = inline_on_tool_result,		.on_turn_done = inline_on_turn_done,	};	struct clm_cfg cfg = {		.api_key = "test",		.provider = CLM_PROVIDER_OPENAI,		.model = "test",		.max_iterations = 2,	};	char url[128];	int r; 	CHECK(uv_loop_init(&loop) == 0, "inline loop init");	srv = canned_start(&loop);	CHECK(srv != NULL, "inline canned server");	if (srv == NULL)		return 1;	(void)snprintf(url, sizeof(url),	    "http://127.0.0.1:%d/v1/chat/completions", canned_port(srv));	cfg.base_url = url; 	r = clm_host_uv_new(&loop, &host.uv_host);	CHECK(r == 0, "inline uv host creation");

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