UIServiceTest: add a couple more tests

Author: ctrueden

src/test/java/org/scijava/ui/UIServiceTest.java

@@ -31,9 +31,12 @@
 
 package org.scijava.ui;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import java.util.List;
+
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -64,6 +67,18 @@ public void tearDown() {
 		context.dispose();
 	}
 
+	@Test
+	public void testDefaultUI() {
+		assertTrue(uiService.getDefaultUI() instanceof HeadlessUI);
+	}
+
+	@Test
+	public void testAvailableUIs() {
+		final List<UserInterface> uiList = uiService.getAvailableUIs();
+		assertEquals(1, uiList.size());
+		assertTrue(uiList.get(0) instanceof HeadlessUI);
+	}
+
 	@Test
 	public void testHeadlessUI() {
 		final MockUserInterface mockUI = new MockUserInterface();