proc-macro: Timeout for tests

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

testing/integration-tests/src/utils/mod.rs

@@ -11,3 +11,14 @@ pub use context::*;
 pub use node_proc::TestNodeProcess;
 pub use tx_retries::*;
 pub use wait_for_blocks::*;
+
+pub use integration_tests_proc_macro::subxt_test;
+
+/// The test timeout is set to 1 second.
+/// However, the test is sleeping for 5 seconds.
+/// This must cause the test to panic.
+#[subxt_test(timeout = 1)]
+#[should_panic]
+async fn test_subxt_macro() {
+    tokio::time::sleep(std::time::Duration::from_secs(5)).await;
+}