Nomad changes

docs/snippets/java/plugins/plugin_testing.md

@@ -0,0 +1,37 @@
+```java title="Java"
+import dev.kreuzberg.ExtractionResult;
+import dev.kreuzberg.PostProcessor;
+import org.junit.jupiter.api.Test;
+import java.util.HashMap;
+import java.util.Map;
+import static org.junit.jupiter.api.Assertions.*;
+
+class PostProcessorTest {
+    @Test
+    void testWordCountProcessor() {
+        PostProcessor processor = result -> {
+            long count = result.getContent().split("\\s+").length;
+
+            Map<String, Object> metadata = new HashMap<>(result.getMetadata());
+            metadata.put("word_count", count);
+
+            return result;
+        };
+
+        ExtractionResult input = new ExtractionResult(
+            "Hello world test",
+            "text/plain",
+            new HashMap<>(),
+            java.util.List.of(),
+            java.util.List.of(),
+            java.util.List.of(),
+            java.util.List.of(),
+            true
+        );
+
+        ExtractionResult output = processor.process(input);
+
+        assertEquals(3, output.getMetadata().get("word_count"));
+    }
+}
+```