Make a test crate to make the runtime-test usable (#1258)

Fixes #833

polkadot/node/test-service/tests/build-blocks.rs

@@ -0,0 +1,78 @@
+// Copyright 2020 Parity Technologies (UK) Ltd.
+// This file is part of Polkadot.
+
+// Polkadot 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.
+
+// Polkadot 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 Polkadot.  If not, see <http://www.gnu.org/licenses/>.
+
+use tokio::{time::delay_for as sleep, task::spawn};
+use futures::{future, pin_mut, select, FutureExt as _};
+use polkadot_test_service::*;
+use service::TaskExecutor;
+use sp_keyring::Sr25519Keyring;
+use std::time::Duration;
+
+static INTEGRATION_TEST_ALLOWED_TIME: Option<&str> = option_env!("INTEGRATION_TEST_ALLOWED_TIME");
+
+#[tokio::test]
+async fn ensure_test_service_build_blocks() {
+	let task_executor: TaskExecutor = (move |fut, _| {
+		spawn(fut);
+	})
+	.into();
+	let mut alice = run_test_node(
+		task_executor.clone(),
+		Sr25519Keyring::Alice,
+		|| {},
+		Vec::new(),
+	);
+	let mut bob = run_test_node(
+		task_executor.clone(),
+		Sr25519Keyring::Bob,
+		|| {},
+		vec![alice.addr.clone()],
+	);
+	let t1 = sleep(Duration::from_secs(
+		INTEGRATION_TEST_ALLOWED_TIME
+			.and_then(|x| x.parse().ok())
+			.unwrap_or(600),
+	))
+	.fuse();
+	let t2 = async {
+		{
+			let t1 = future::join(alice.wait_for_blocks(3), bob.wait_for_blocks(3)).fuse();
+			let t2 = alice.task_manager.future().fuse();
+			let t3 = bob.task_manager.future().fuse();
+
+			pin_mut!(t1, t2, t3);
+
+			select! {
+				_ = t1 => {},
+				_ = t2 => panic!("service Alice failed"),
+				_ = t3 => panic!("service Bob failed"),
+			}
+		}
+
+		alice.task_manager.terminate();
+		bob.task_manager.terminate();
+	}
+	.fuse();
+
+	pin_mut!(t1, t2);
+
+	select! {
+		_ = t1 => {
+			panic!("the test took too long, maybe no blocks have been produced");
+		},
+		_ = t2 => {},
+	}
+}