Add a very minimalistic Hello World test.

test/functional/feature_hello_world.py

@@ -0,0 +1,20 @@
+#!/usr/bin/env python3
+"""A very minimalistic Hello World test!
+"""
+from collections import defaultdict
+from test_framework.test_framework import BitcoinTestFramework
+
+
+class ExampleTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.setup_clean_chain = True
+        self.num_nodes = 1
+
+    def run_test(self):
+        """Main test logic"""
+
+        self.log.info("Hello Brazil!")
+
+
+if __name__ == '__main__':
+    ExampleTest(__file__).main()

test/functional/test_runner.py

@@ -114,6 +114,7 @@
     'p2p_segwit.py',
     'feature_maxuploadtarget.py',
     'feature_assumeutxo.py',
+    'feature_hello_world.py',
     'mempool_updatefromblock.py',
     'mempool_persist.py',
     # vv Tests less than 60s vv