Add Simple OpenMP kernel test

Author: mcbarton

test/test_xcpp_kernel.py

@@ -225,5 +225,53 @@ class BaseXCppTests2(jupyter_kernel_test.KernelTests):
         }
     )
 
+if platform.system() != 'Windows':
+    class BaseXCppOpenMPTests(jupyter_kernel_test.KernelTests):
+        __test__ = False
+
+        # language_info.name in a kernel_info_reply should match this
+        language_name = 'C++'
+
+        # Code that should write the exact string `hello, world` to STDOUT
+        code_omp="""
+        #include <omp.h>
+        #include <iostream>
+        #include <clang/Interpreter/CppInterOp.h>
+        Cpp::LoadLibrary("libomp");
+        int main() {
+            int max_threads = omp_get_max_threads();
+
+            printf("max threads: %d\n", max_threads);
+            omp_set_num_threads(max_threads);
+
+            #pragma omp parallel
+            {
+                int id = omp_get_thread_num();
+                printf("Hello World from thread = %d with %d threads\n", id, omp_get_num_threads());
+            }
+
+            printf("all done, with hopefully %d threads\n", max_threads);
+        }
+        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')
+
+    kernel_names = ['xcpp17-omp', 'xcpp20-omp', 'xcpp23-omp']
+
+    for name in kernel_names:
+        class_name = f"XCppOpenMPTests_{name}"
+        globals()[class_name] = type(
+            class_name,
+            (BaseXCppOpenMPTests,),
+            {
+                'kernel_name': name,
+                '__test__': True
+            }
+        )
+
 if __name__ == '__main__':
     unittest.main()