Added even more tests

src/test/data/ListOfWatchListTest.java

@@ -0,0 +1,45 @@
+package data;
+
+import data.ListOfWatchList;
+import data.WatchList;
+import data.exceptions.*;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
+
+public class ListOfWatchListTest {
+    private WatchList watchlist;
+
+    @BeforeEach
+    public void runBefore() {
+        watchlist = new WatchList();
+    }
+
+    @Test
+    public void singletonCheck() {
+        assertTrue(ListOfWatchList.getList() == ListOfWatchList.getList());
+    }
+
+    @Test
+    public void addDelWatchList() {
+        ListOfWatchList lowl = ListOfWatchList.getList();
+        lowl.addWatchList(watchlist);
+        assertEquals(watchlist, lowl.getWatchList(0));
+        lowl.addWatchList(watchlist);
+        assertEquals(watchlist, lowl.getWatchList(0));
+        try {
+            lowl.getWatchList(1);
+        } catch (IndexOutOfBoundsException e) {
+            // expected fail
+        }
+        lowl.delWatchList(watchlist);
+        try {
+            lowl.getWatchList(0);
+        } catch (IndexOutOfBoundsException e) {
+            // expected fail
+        }
+    }
+}

src/test/data/WatchListTest.java

@@ -25,13 +25,17 @@ public class WatchListTest {
     @Test
     public void testAddStockNames() {
         String[] testarray = new String[100];
+        String[] testgetName = new String[100];
         for (int i = 0; i < 100; i++) {
             watchlist.addStock(Integer.toString(i));
             testarray[i] = Integer.toString(i);
         }
+        testgetName = watchlist.getNames();
         for (int i = 0; i < 100; i++) {
             assertEquals(testarray[i], watchlist.getStock(i).getID());
             assertEquals(Integer.toString(i), watchlist.getStock(i).getID());
+            assertEquals(testarray[i], testgetName[i]);
+            assertEquals(Integer.toString(i), testgetName[i]);
         }
     }
 
@@ -100,4 +104,9 @@ public class WatchListTest {
         System.setOut(originalOut);
         System.setErr(originalErr);
     }
+
+    @Test
+    public void testUpdateEmptyList() {
+        watchlist.updateList();
+    }
 }