test(server): static-site decoy resolves directory requests to index.html (COV-12 review-002)

src/server/decoy.rs

@@ -286,6 +286,26 @@ mod tests {
         assert_eq!(&bytes[..], b"<p>about</p>");
     }
 
+    #[tokio::test]
+    async fn static_site_decoy_directory_request_resolves_to_index_html() {
+        let dir = tempfile_dir();
+        tokio::fs::create_dir_all(dir.join("docs")).await.unwrap();
+        tokio::fs::write(dir.join("docs").join("index.html"), "dir index")
+            .await
+            .unwrap();
+
+        let decoy = DecoyConfig::StaticSite { root: dir };
+        let resp = send(decoy_router(decoy), "/docs").await;
+        assert_eq!(resp.status(), StatusCode::OK);
+        let ctype = resp
+            .headers()
+            .get(header::CONTENT_TYPE)
+            .map(|v| v.to_str().unwrap().to_string());
+        assert!(ctype.as_deref().unwrap_or("").starts_with("text/html"));
+        let bytes = resp.into_body().collect().await.unwrap().to_bytes();
+        assert_eq!(&bytes[..], b"dir index");
+    }
+
     #[tokio::test]
     async fn static_site_decoy_missing_file_returns_fake_404() {
         let dir = tempfile_dir();