refactor into a service

src/test/java/com/commafeed/backend/service/FeedEntryFilteringServiceTest.java

@@ -0,0 +1,68 @@
+package com.commafeed.backend.service;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.commafeed.backend.model.FeedEntry;
+import com.commafeed.backend.model.FeedEntryContent;
+import com.commafeed.backend.service.FeedEntryFilteringService.FeedEntryFilterException;
+
+public class FeedEntryFilteringServiceTest {
+
+	private FeedEntryFilteringService service;
+
+	private FeedEntry entry;
+	private FeedEntryContent content;
+
+	@Before
+	public void init() {
+		service = new FeedEntryFilteringService();
+
+		entry = new FeedEntry();
+		entry.setUrl("https://github.com/Athou/commafeed");
+
+		content = new FeedEntryContent();
+		content.setAuthor("Athou");
+		content.setTitle("Merge pull request #662 from Athou/dw8");
+		content.setContent("Merge pull request #662 from Athou/dw8");
+		entry.setContent(content);
+
+	}
+
+	@Test
+	public void emptyFilterMatchesFilter() throws FeedEntryFilterException {
+		Assert.assertTrue(service.filterMatchesEntry(null, entry));
+	}
+
+	@Test
+	public void blankFilterMatchesFilter() throws FeedEntryFilterException {
+		Assert.assertTrue(service.filterMatchesEntry("", entry));
+	}
+
+	@Test
+	public void simpleExpression() throws FeedEntryFilterException {
+		Assert.assertTrue(service.filterMatchesEntry("author eq 'athou'", entry));
+	}
+
+	@Test(expected = FeedEntryFilterException.class)
+	public void newIsDisabled() throws FeedEntryFilterException {
+		service.filterMatchesEntry("null eq new ('java.lang.String', 'athou')", entry);
+	}
+
+	@Test(expected = FeedEntryFilterException.class)
+	public void getClassMethodIsDisabled() throws FeedEntryFilterException {
+		service.filterMatchesEntry("null eq ''.getClass()", entry);
+	}
+
+	@Test
+	public void dotClassIsDisabled() throws FeedEntryFilterException {
+		Assert.assertTrue(service.filterMatchesEntry("null eq ''.class", entry));
+	}
+
+	@Test(expected = FeedEntryFilterException.class)
+	public void cannotLoopForever() throws FeedEntryFilterException {
+		service.filterMatchesEntry("while(true) {}", entry);
+	}
+
+}