libguac: nested send instruction test

Fix a race condition in the test.
The server is not waiting for the child to finish writing the message and this leads to a failed test if the child code is not running fast enough.

Signed-Off-By: Sven Auhagen <[email protected]>

src/libguac/tests/socket/nested_send_instruction.c

@@ -22,6 +22,7 @@
 #include <guacamole/socket.h>
 
 #include <stdlib.h>
+#include <sys/wait.h>
 #include <unistd.h>
 
 /**
@@ -123,6 +124,7 @@ static void read_expected_instructions(int fd) {
 void test_socket__nested_send_instruction() {
 
     int fd[2];
+    int return_status;
 
     /* Create pipe */
     CU_ASSERT_EQUAL_FATAL(pipe(fd), 0);
@@ -141,6 +143,9 @@ void test_socket__nested_send_instruction() {
         exit(0);
     }
 
+    /* Wait for child to finish */
+    waitpid(childpid, &return_status, 0);
+
     /* Read and verify the expected instructions within the parent process */
     close(write_fd);
     read_expected_instructions(read_fd);