fix build warning

commafeed-server/src/test/java/com/commafeed/backend/feed/FeedUtilsTest.java

@@ -0,0 +1,41 @@
+package com.commafeed.backend.feed;
+
+import java.time.Instant;
+import java.util.Date;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import com.commafeed.frontend.model.Entry;
+import com.rometools.rome.feed.synd.SyndEntry;
+
+class FeedUtilsTest {
+
+	@Test
+	void asRss() {
+		Entry entry = new Entry();
+		entry.setId("1");
+		entry.setGuid("guid-1");
+		entry.setTitle("Test Entry");
+		entry.setContent("This is a test entry content.");
+		entry.setCategories("test,example");
+		entry.setRtl(false);
+		entry.setAuthor("Author Name");
+		entry.setEnclosureUrl("http://example.com/enclosure.mp3");
+		entry.setEnclosureType("audio/mpeg");
+		entry.setDate(Instant.ofEpochSecond(1));
+		entry.setUrl("http://example.com/test-entry");
+
+		SyndEntry syndEntry = FeedUtils.asRss(entry);
+		Assertions.assertEquals("guid-1", syndEntry.getUri());
+		Assertions.assertEquals("Test Entry", syndEntry.getTitle());
+		Assertions.assertEquals("Author Name", syndEntry.getAuthor());
+		Assertions.assertEquals(1, syndEntry.getContents().size());
+		Assertions.assertEquals("This is a test entry content.", syndEntry.getContents().get(0).getValue());
+		Assertions.assertEquals(1, syndEntry.getEnclosures().size());
+		Assertions.assertEquals("http://example.com/enclosure.mp3", syndEntry.getEnclosures().get(0).getUrl());
+		Assertions.assertEquals("audio/mpeg", syndEntry.getEnclosures().get(0).getType());
+		Assertions.assertEquals("http://example.com/test-entry", syndEntry.getLink());
+		Assertions.assertEquals(Date.from(Instant.ofEpochSecond(1)), syndEntry.getPublishedDate());
+	}
+}