feat: test for type-safe rpcs

Author: ThePoultryMan

itest/rust/src/builtin_tests/containers/rpc_test.rs

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) godot-rust; Bromeon and contributors.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+use godot::meta::error::RpcError;
+use godot::prelude::*;
+use godot::test::itest;
+
+use crate::framework::TestContext;
+
+#[derive(GodotClass)]
+#[class(init, base = Node)]
+pub struct RpcCallableNode {
+    base: Base<Node>,
+}
+
+#[godot_api]
+impl INode for RpcCallableNode {}
+
+#[godot_api]
+impl RpcCallableNode {
+    #[rpc]
+    pub fn say_hello_world(&mut self) {
+        godot_print!("hello, world");
+    }
+
+    #[rpc]
+    pub fn say_hello_to(&mut self, to: String) {
+        godot_print!("hello, {to}");
+    }
+
+    #[rpc]
+    pub fn say_number(&self, number: i32) {
+        godot_print!("{number}");
+    }
+}
+
+#[itest]
+fn type_safe_rpc_test(context: &TestContext) {
+    let mut node = RpcCallableNode::new_alloc();
+
+    // Within the testing environment, this function does not get run automatically, so we call it here manually.
+
+    let mut root = context.scene_tree.clone();
+
+    // Before we add the node to the tree, RPCs will fail.
+    assert_eq!(
+        Err(RpcError::Unconfigured),
+        node.bind_mut().rpcs().say_hello_world().call()
+    );
+
+    root.add_child(&node);
+
+    assert_eq!(Ok(()), node.rpcs().say_hello_world().call());
+
+    let arg = "godot".to_string();
+    assert_eq!(Ok(()), node.rpcs().say_hello_to(arg.clone()).call());
+    assert_eq!(Ok(()), node.bind_mut().rpcs().say_hello_to(arg).call());
+    assert_eq!(Ok(()), node.rpcs().say_number(3).call());
+    root.remove_child(&node);
+    node.free();
+}

itest/rust/src/builtin_tests/mod.rs

@@ -31,6 +31,7 @@ mod containers {
     mod dictionary_test;
     mod packed_array_test;
     mod rid_test;
+    mod rpc_test;
     mod signal_disconnect_test;
     mod signal_test;
     mod variant_test;