Add remove channel method

Move test client fields into appstate and fix tests

Co-authored-by: max <max@zed.dev>

crates/client/src/channel_store.rs

@@ -51,6 +51,10 @@ impl ChannelStore {
         &self.channel_invitations
     }
 
+    pub fn channel_for_id(&self, channel_id: u64) -> Option<Arc<Channel>> {
+        self.channels.iter().find(|c| c.id == channel_id).cloned()
+    }
+
     pub fn create_channel(
         &self,
         name: &str,
@@ -103,6 +107,14 @@ impl ChannelStore {
         false
     }
 
+    pub fn remove_channel(&self, channel_id: u64) -> impl Future<Output = Result<()>> {
+        let client = self.client.clone();
+        async move {
+            client.request(proto::RemoveChannel { channel_id }).await?;
+            Ok(())
+        }
+    }
+
     pub fn remove_member(
         &self,
         channel_id: u64,

crates/client/src/client.rs

@@ -575,7 +575,10 @@ impl Client {
             }),
         );
         if prev_handler.is_some() {
-            panic!("registered handler for the same message twice");
+            panic!(
+                "registered handler for the same message {} twice",
+                std::any::type_name::<M>()
+            );
         }
 
         Subscription::Message {