Added a bit more test

src/test/data/DataSourceTest.java

@@ -6,6 +6,7 @@ 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 network.AlphaVantage;
+import java.io.IOException;
 
 public class DataSourceTest {
     private StockType testStype;
@@ -21,14 +22,24 @@ public class DataSourceTest {
     public void testAddDel() {
         testStype.addSource(testSource);
         testSource.delStype(testStype);
+        testSource.delStype(testStype);
     }
 
     @Test
     public void testEqualsHash() {
         DataSource testSource2 = new AlphaVantage();
+        DataSource testSource3 = new DataSource("test source", "asdf", "asdf") {
+            @Override
+            public double[] update(String asdf, String asdf2) throws IOException {
+                double[] asdfjkl = {0.0, 0.0};
+                return asdfjkl;
+            }
+        };
         String asdf = "asdf";
+        assertEquals(testSource, testSource);
         assertEquals(testSource, testSource2);
         assertFalse(testSource.equals(asdf));
+        assertFalse(testSource.equals(testSource3));
         assertEquals(testSource.hashCode(), testSource2.hashCode());
     }
 }