chore: seed sgclaw rust baseline

tests/common/mod.rs

@@ -0,0 +1,38 @@
+use std::collections::VecDeque;
+use std::sync::Mutex;
+use std::time::Duration;
+
+use sgclaw::pipe::{AgentMessage, BrowserMessage, PipeError, Transport};
+
+pub struct MockTransport {
+    incoming: Mutex<VecDeque<BrowserMessage>>,
+    sent: Mutex<Vec<AgentMessage>>,
+}
+
+impl MockTransport {
+    pub fn new(messages: Vec<BrowserMessage>) -> Self {
+        Self {
+            incoming: Mutex::new(VecDeque::from(messages)),
+            sent: Mutex::new(Vec::new()),
+        }
+    }
+
+    pub fn sent_messages(&self) -> Vec<AgentMessage> {
+        self.sent.lock().unwrap().clone()
+    }
+}
+
+impl Transport for MockTransport {
+    fn send(&self, message: &AgentMessage) -> Result<(), PipeError> {
+        self.sent.lock().unwrap().push(message.clone());
+        Ok(())
+    }
+
+    fn recv_timeout(&self, _timeout: Duration) -> Result<BrowserMessage, PipeError> {
+        self.incoming
+            .lock()
+            .unwrap()
+            .pop_front()
+            .ok_or(PipeError::Timeout)
+    }
+}