add stub for testing feed::find

src/feed/find.rs

@@ -18,3 +18,15 @@ pub fn find(site: &str, channel_name: &str) -> Result<String> {
         .to_string();
     Ok(rss_url)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn finds_rss_url() -> Result<()> {
+        // TODO: need to inject wrapper for reqwest::blocking::get
+        //
+        // todo!();
+        Ok(())
+    }
+}