initial support for entry filtering

src/test/java/com/commafeed/backend/feed/FeedEntryFilterTest.java

@@ -0,0 +1,64 @@
+package com.commafeed.backend.feed;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+import com.commafeed.backend.model.FeedEntry;
+import com.commafeed.backend.model.FeedEntryContent;
+
+public class FeedEntryFilterTest {
+
+	private FeedEntry entry;
+	private FeedEntryContent content;
+
+	@Before
+	public void init() {
+		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() {
+		FeedEntryFilter filter = new FeedEntryFilter(null);
+		Assert.assertTrue(filter.matchesEntry(entry));
+	}
+
+	@Test
+	public void blankFilterMatchesFilter() {
+		FeedEntryFilter filter = new FeedEntryFilter("");
+		Assert.assertTrue(filter.matchesEntry(entry));
+	}
+
+	@Test
+	public void simpleExpression() {
+		FeedEntryFilter filter = new FeedEntryFilter("author eq 'athou'");
+		Assert.assertTrue(filter.matchesEntry(entry));
+	}
+
+	@Test
+	public void newIsDisabled() {
+		FeedEntryFilter filter = new FeedEntryFilter("null eq new ('java.lang.String', 'athou')");
+		Assert.assertTrue(filter.matchesEntry(entry));
+	}
+
+	@Test
+	public void getClassMethodIsDisabled() {
+		FeedEntryFilter filter = new FeedEntryFilter("null eq ''.getClass()");
+		Assert.assertTrue(filter.matchesEntry(entry));
+	}
+
+	@Test
+	public void dotClassIsDisabled() {
+		FeedEntryFilter filter = new FeedEntryFilter("null eq ''.class");
+		Assert.assertTrue(filter.matchesEntry(entry));
+	}
+
+}