test: add some basic command-line usage tests

3 files changed, 20 insertions, 12 deletions

diff --git a/src/client.c b/src/client.c
index b783afe..5259d52 100644
--- a/src/client.c
+++ b/src/client.c
@@ -6,6 +6,7 @@
  */
 
 #include "client.h"
+#include "cmd_line.h"
 #include "compiler.h"
 #include "log.h"
 #include "msg.h"
@@ -35,25 +36,30 @@ void client_destroy(struct client *client)
 	free(client);
 }
 
-int client_main(UNUSED const struct client *client, const struct settings *settings,
+int client_main(UNUSED const struct client *client, const struct settings *settings, int argc,
                 const char **argv)
 {
 	struct msg *response = NULL;
 	int ret = 0;
 
-	ret = msg_connect_and_talk_argv(settings->host, settings->port, argv, &response);
-	if (ret < 0)
-		return ret;
+	if (argc < 1) {
+		exit_with_usage_err("no message to send to the server");
+		return -1;
+	}
 
-	if (!msg_is_success(response)) {
-		log_err("Server failed to process the request\n");
-		msg_dump(response);
-		ret = -1;
+	ret = msg_connect_and_talk_argv(settings->host, settings->port, argv, &response);
+	if (ret < 0 || !response || !msg_is_success(response)) {
+		log_err("Failed to connect to server or it couldn't process the request\n");
+		if (response)
+			msg_dump(response);
+		if (!ret)
+			ret = -1;
 		goto free_response;
 	}
 
 free_response:
-	msg_free(response);
+	if (response)
+		msg_free(response);
 
 	return ret;
 }
diff --git a/src/client.h b/src/client.h
index 471a7be..ff91170 100644
--- a/src/client.h
+++ b/src/client.h
@@ -18,6 +18,6 @@ struct client;
 int client_create(struct client **);
 void client_destroy(struct client *);
 
-int client_main(const struct client *, const struct settings *, const char **argv);
+int client_main(const struct client *, const struct settings *, int argc, const char **argv);
 
 #endif
diff --git a/src/client_main.c b/src/client_main.c
index 0a68a55..ac092d1 100644
--- a/src/client_main.c
+++ b/src/client_main.c
@@ -24,7 +24,9 @@ static struct settings default_settings(void)
 
 const char *get_usage_string(void)
 {
-	return "[-h|--help] [-V|--version] [-v|--verbose] [-H|--host HOST] [-p|--port PORT]";
+	/* clang-format off */
+	return "[-h|--help] [-V|--version] [-v|--verbose] [-H|--host HOST] [-p|--port PORT] ACTION [ARG...]";
+	/* clang-format on */
 }
 
 static int parse_settings(struct settings *settings, int argc, char *argv[])
@@ -84,7 +86,7 @@ int main(int argc, char *argv[])
 	if (ret < 0)
 		return ret;
 
-	ret = client_main(client, &settings, (const char **)argv + optind);
+	ret = client_main(client, &settings, argc - optind, (const char **)argv + optind);
 	if (ret < 0)
 		goto destroy_client;