Add oving 5

src/test/java/oving5/twitter/FollowersCountComparatorTest.java

@@ -0,0 +1,35 @@
+package oving5.twitter;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class FollowersCountComparatorTest {
+
+	private TwitterAccount aaron;
+	private TwitterAccount ben;
+	private TwitterAccount charlie;
+	private FollowersCountComparator comparator;
+
+	@BeforeEach
+	public void SetUp() {
+		aaron = new TwitterAccount("Aaron");
+		ben = new TwitterAccount("Ben");
+		charlie = new TwitterAccount("Charlie");
+		comparator = new FollowersCountComparator();
+	}
+
+	@Test
+	@DisplayName("Check that the comparison is based on followers")
+	public void testCompare() {
+		aaron.follow(ben);
+		ben.follow(aaron);
+		assertEquals(0, comparator.compare(aaron, ben), "Aaron and Ben should be equal");
+
+		charlie.follow(ben);
+		assertTrue(comparator.compare(aaron, ben) > 0, "Aaron should come after Ben");
+		assertTrue(comparator.compare(ben, aaron) < 0, "Ben should come before Aaron");
+	}
+}