test: Add unit tests for frontend routing and file handling

apps/nxmesh-master/src/routes/frontend/mod.rs

@@ -67,3 +67,83 @@ async fn get_file_handler(
             .map(|html| html.into_response()),
     }
 }
+
+#[cfg(test)]
+#[allow(clippy::expect_used)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_get_index_html() {
+        let index_html = get_index_html();
+        assert!(
+            index_html.is_some(),
+            "Expected to find index.html in embedded assets"
+        );
+    }
+
+    #[tokio::test]
+    async fn test_get_file_handler_existing_file() {
+        let response = get_file_handler(axum::extract::Path("index.html".to_string())).await;
+        assert!(
+            response.is_ok(),
+            "Expected to successfully retrieve index.html"
+        );
+        let response = response.expect("Expected response to be Ok");
+        assert_eq!(response.status(), axum::http::StatusCode::OK);
+        assert!(
+            response
+                .headers()
+                .get(axum::http::header::CONTENT_TYPE)
+                .map(|ct| ct.to_str().unwrap_or(""))
+                .expect("Content-Type header should be present")
+                .starts_with("text/html")
+        );
+    }
+
+    #[tokio::test]
+    async fn test_get_file_handler_nonexistent_file() {
+        let response = get_file_handler(axum::extract::Path("nonexistent.txt".to_string())).await;
+        assert!(
+            response.is_ok(),
+            "Expected to fallback to index.html for nonexistent file"
+        );
+        let response = response.expect("Expected response to be Ok");
+        assert_eq!(response.status(), axum::http::StatusCode::OK);
+        assert!(
+            response
+                .headers()
+                .get(axum::http::header::CONTENT_TYPE)
+                .map(|ct| ct.to_str().unwrap_or(""))
+                .expect("Content-Type header should be present")
+                .starts_with("text/html")
+        )
+    }
+}
+
+#[cfg(test)]
+mod axum_tests {
+    use super::*;
+    use axum_test::TestServer;
+
+    #[tokio::test]
+    async fn test_should_return_index_html_for_root_path() {
+        let router = get_router().await;
+        let server = TestServer::new(router);
+        let response = server.get("/").await;
+        assert_eq!(response.status_code(), 200);
+    }
+
+    #[tokio::test]
+    async fn test_should_return_index_html_for_nonexistent_path() {
+        let router = get_router().await;
+        let server = TestServer::new(router);
+        let fallback_response = server.get("/nonexistent").await;
+        assert_eq!(fallback_response.status_code(), 200);
+
+        let index_response = server.get("/").await;
+        assert_eq!(index_response.status_code(), 200);
+
+        assert_eq!(fallback_response.text(), index_response.text());
+    }
+}

apps/nxmesh-master/src/routes/mod.rs

@@ -7,3 +7,30 @@ pub async fn get_root_router() -> Router {
         .merge(frontend::get_router().await)
         .fallback(frontend::get_fallback_handler().await)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use axum_test::TestServer;
+
+    #[tokio::test]
+    async fn test_should_return_index_html_for_root_path() {
+        let router = get_root_router().await;
+        let server = TestServer::new(router);
+        let response = server.get("/").await;
+        assert_eq!(response.status_code(), 200);
+    }
+
+    #[tokio::test]
+    async fn test_should_return_index_html_for_nonexistent_path() {
+        let router = get_root_router().await;
+        let server = TestServer::new(router);
+        let fallback_response = server.get("/nonexistent").await;
+        assert_eq!(fallback_response.status_code(), 200);
+
+        let index_response = server.get("/").await;
+        assert_eq!(index_response.status_code(), 200);
+
+        assert_eq!(fallback_response.text(), index_response.text());
+    }
+}