test: Add hash check to pythia8 output (#1461)

This adds a simple ROOT hash check to the Pythia8 particles output.

Examples/Python/tests/root_file_hashes.txt

@@ -92,3 +92,5 @@ test_vertex_fitting_reading[AMVF-True-100]__performance_vertexing.root: 202f06dc
 
 test_bfield_writing__solenoid.root: 85c03b7ca7e37d078f8a17233a6ce878faf51db4edd6a189d9e2c5f826ea1a39
 test_bfield_writing__solenoid2.root: 531b302c45d042749f5ef08004909309c423ce5a8d977bf462ea90a1c75eb21b
+
+test_pythia8__pythia8_particles.root: 7821e866de83a4e81a1ad76cb742f9d18ecccfd1d0deebd1baa582880a1a6511

Examples/Python/tests/test_examples.py

@@ -65,7 +65,7 @@ def assert_entries(root_file, tree_name, exp):
 
 
 @pytest.mark.slow
-def test_pythia8(tmp_path, seq):
+def test_pythia8(tmp_path, seq, assert_root_hash):
     from pythia8 import runPythia8
 
     (tmp_path / "csv").mkdir()
@@ -75,14 +75,15 @@ def test_pythia8(tmp_path, seq):
 
     events = seq.config.events
 
-    runPythia8(str(tmp_path), s=seq).run()
+    runPythia8(str(tmp_path), outputRoot=True, outputCsv=True, s=seq).run()
 
     del seq
 
     fp = tmp_path / "pythia8_particles.root"
     assert fp.exists()
     assert fp.stat().st_size > 2**10 * 50
     assert_entries(fp, "particles", events)
+    assert_root_hash(fp.name, fp)
 
     assert len(list((tmp_path / "csv").iterdir())) > 0
     assert_csv_output(tmp_path / "csv", "particles")