added Test Method for add and dummy method in TextTest.java

test/TextTest.java

@@ -14,6 +14,25 @@ public class TextTest {
         txt = new Text();
     }
 
+    /**
+     * Test Method for add and dummy methods
+     */
+    @Test
+    void addTest() {
+        Assertions.assertEquals(0, txt.getText().size());
+        Assertions.assertEquals(false, txt.add(1, "test"));
+        Assertions.assertEquals(false, txt.dummy(1));
+        Assertions.assertEquals(0, txt.getText().size());
+        Assertions.assertEquals(true, txt.add("test1"));
+        Assertions.assertEquals(true, txt.add(1, "test2"));
+        Assertions.assertEquals("test2", txt.getText().get(0));
+        Assertions.assertEquals("test1", txt.getText().get(1));
+        Assertions.assertEquals(true, txt.dummy(2));
+        Assertions.assertEquals(true, txt.dummy());
+        Assertions.assertEquals(true, txt.getText().get(1).equals(txt.getText().get(3)));
+        Assertions.assertEquals(4, txt.getText().size());
+    }
+
     @Test
     void indexTest() {
         txt.add("Hallo ?Hallo> zusammen !test!");