log authorities change (#726)

substrate/srml/consensus/src/tests.rs

@@ -0,0 +1,66 @@
+// Copyright 2017 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Tests for the module.
+
+#![cfg(test)]
+
+use super::*;
+use primitives::{generic, testing};
+use runtime_io::with_externalities;
+use substrate_primitives::H256;
+use mock::{Consensus, System, new_test_ext};
+
+#[test]
+fn authorities_change_logged() {
+	with_externalities(&mut new_test_ext(vec![1, 2, 3]), || {
+		System::initialise(&1, &Default::default(), &Default::default());
+		Consensus::set_authorities(&[4, 5, 6]);
+		Consensus::on_finalise(1);
+		let header = System::finalise();
+		assert_eq!(header.digest, testing::Digest {
+			logs: vec![
+				generic::DigestItem::AuthoritiesChange::<H256, u64>(vec![4, 5, 6]),
+			],
+		});
+	});
+}
+
+#[test]
+fn authorities_change_is_not_logged_when_not_changed() {
+	with_externalities(&mut new_test_ext(vec![1, 2, 3]), || {
+		System::initialise(&1, &Default::default(), &Default::default());
+		Consensus::on_finalise(1);
+		let header = System::finalise();
+		assert_eq!(header.digest, testing::Digest {
+			logs: vec![],
+		});
+	});
+}
+
+#[test]
+fn authorities_change_is_not_logged_when_changed_back_to_original() {
+	with_externalities(&mut new_test_ext(vec![1, 2, 3]), || {
+		System::initialise(&1, &Default::default(), &Default::default());
+		Consensus::set_authorities(&[4, 5, 6]);
+		Consensus::set_authorities(&[1, 2, 3]);
+		Consensus::on_finalise(1);
+		let header = System::finalise();
+		assert_eq!(header.digest, testing::Digest {
+			logs: vec![],
+		});
+	});
+}