address_integration_test: Add initial multi threaded test.

tests/address.rs

@@ -0,0 +1,39 @@
+//! Address related integration tests.
+
+use bitcoin_mock_rpc::{Client, RpcApiWrapper};
+use bitcoincore_rpc::{Auth, RpcApi};
+use std::thread;
+
+mod common;
+
+#[test]
+fn generate_to_address_multi_threaded() {
+    // Bacause `thread::spawn` moves value to closure, cloning a new is needed. This is good,
+    // because cloning an rpc struct should have a persistent ledger even though there are more than
+    // one accessors.
+    let rpc = Client::new("", Auth::None).unwrap();
+    let cloned_rpc = rpc.clone();
+    let address = rpc.get_new_address(None, None).unwrap().assume_checked();
+    let cloned_address = address.clone();
+
+    let initial_balance = rpc.get_balance(None, None).unwrap();
+
+    thread::spawn(move || {
+        cloned_rpc
+            .generate_to_address(101, &cloned_address)
+            .unwrap();
+
+        assert!(cloned_rpc.get_balance(None, None).unwrap() > initial_balance);
+    })
+    .join()
+    .unwrap();
+
+    // Change made in other rpc connection should be available now.
+    let changed_balance = rpc.get_balance(None, None).unwrap();
+    assert!(changed_balance > initial_balance);
+
+    // Adding new blocks should add more funds.
+    rpc.generate_to_address(101, &address).unwrap();
+    assert!(rpc.get_balance(None, None).unwrap() > changed_balance);
+    assert!(rpc.get_balance(None, None).unwrap() > initial_balance);
+}