Modify OpenMP kernel test

Author: mcbarton

test/test_xcpp_kernel.py

@@ -238,13 +238,27 @@ class BaseXCppOpenMPTests(jupyter_kernel_test.KernelTests):
         #include <iostream>
         #include <clang/Interpreter/CppInterOp.h>
         Cpp::LoadLibrary("libomp");
-        printf("all done, with hopefully threads\n");
+        int main() {
+        omp_set_num_threads(2);
+        #pragma omp parallel
+        {
+           if (omp_get_thread_num() == 1) {
+             printf("1");
+             #pragma omp barrier
+           }
+           else if (omp_get_thread_num() == 0) {
+             #pragma omp barrier
+             printf("0");
+           }
+        }
+        }
+        main();
         """
 
         def test_xcpp_omp(self):
                 self.flush_channels()
                 reply, output_msgs = self.execute_helper(code=self.code_omp,timeout=20)
-                self.assertEqual(output_msgs[0]['content']['name'], 'stdout')
+                self.assertEqual(output_msgs[0]['content']['text'], '10\n')
 
     kernel_names = ['xcpp17-omp', 'xcpp20-omp', 'xcpp23-omp']