Nomad changes

docs/snippets/rust/plugins/plugin_testing.md

@@ -0,0 +1,22 @@
+```rust title="Rust"
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[tokio::test]
+    async fn test_custom_extractor() {
+        let extractor = CustomJsonExtractor;
+
+        let json_data = br#"{"message": "Hello, world!"}"#;
+        let config = ExtractionConfig::default();
+
+        let result = extractor
+            .extract_bytes(json_data, "application/json", &config)
+            .await
+            .expect("Extraction failed");
+
+        assert!(result.content.contains("Hello, world!"));
+        assert_eq!(result.mime_type, "application/json");
+    }
+}
+```