config: >rehash command to reload rustbot.conf live (channels/nick/prefix/verbose/modules) without a restart

tests/bot.rs

@@ -76,3 +76,52 @@ fn ignores_own_echoed_message() {
     let out = run(":rubot!r@h PRIVMSG #chan :!ping\r\n");
     assert!(!out.contains(":pong"), "{out}");
 }
+
+#[test]
+fn rehash_applies_channel_nick_and_prefix() {
+    let output = Arc::new(Mutex::new(Vec::new()));
+    let mock = Mock {
+        input: Cursor::new(Vec::new()),
+        output: output.clone(),
+    };
+    let conn = Connection::from_stream(mock);
+    let cfg = Config {
+        name: "testnet".to_string(),
+        channels: vec!["#a".to_string(), "#keep".to_string()],
+        ..Config::default()
+    };
+    let mut bot = Bot::new(cfg, conn);
+
+    let new = Config {
+        name: "testnet".to_string(),
+        channels: vec!["#keep".to_string(), "#b".to_string()],
+        command_prefix: ">".to_string(),
+        nick: "rubot2".to_string(),
+        ..Config::default()
+    };
+    let summary = bot.apply_config(new).unwrap();
+
+    let out = String::from_utf8_lossy(&output.lock().unwrap()).into_owned();
+    assert!(out.contains("JOIN #b"), "{out}");
+    assert!(out.contains("PART #a"), "{out}");
+    assert!(!out.contains("PART #keep"), "{out}");
+    assert!(out.contains("NICK rubot2"), "{out}");
+    assert!(
+        summary.contains("+#b") && summary.contains("-#a"),
+        "{summary}"
+    );
+    assert!(
+        summary.contains("prefix") && summary.contains("nick"),
+        "{summary}"
+    );
+}
+
+#[test]
+fn rehash_command_requires_admin() {
+    // no admin configured -> ignored (default prefix is !)
+    let out = run(":alice!a@h PRIVMSG #chan :!rehash\r\n");
+    assert!(
+        !out.contains("rehash:"),
+        "unauthorized rehash replied: {out}"
+    );
+}