Bob saves lock proof after received so he can resume swap

swap/tests/happy_path_restart_bob_after_lock_proof_received.rs

@@ -0,0 +1,34 @@
+use swap::protocol::{
+    alice, bob,
+    bob::{swap::is_lock_proof_received, BobState},
+};
+
+pub mod testutils;
+
+#[tokio::test]
+async fn given_bob_restarts_after_lock_proof_received_resume_swap() {
+    testutils::setup_test(|mut ctx| async move {
+        let alice_swap = ctx.new_swap_as_alice().await;
+        let bob_swap = ctx.new_swap_as_bob().await;
+
+        let alice_handle = alice::run(alice_swap);
+        let alice_swap_handle = tokio::spawn(alice_handle);
+
+        let bob_state = bob::run_until(bob_swap, is_lock_proof_received)
+            .await
+            .unwrap();
+
+        assert!(matches!(bob_state, BobState::XmrLockProofReceived {..}));
+
+        let bob_swap = ctx.recover_bob_from_db().await;
+        assert!(matches!(bob_swap.state, BobState::XmrLockProofReceived {..}));
+
+        let bob_state = bob::run(bob_swap).await.unwrap();
+
+        ctx.assert_bob_redeemed(bob_state).await;
+
+        let alice_state = alice_swap_handle.await.unwrap().unwrap();
+        ctx.assert_alice_redeemed(alice_state).await;
+    })
+    .await;
+}