Added size function

Author: Levi-B4

DSDoublyLL/dsdoublyll.h

@@ -53,6 +53,12 @@ class DSDoublyLL{
      */
     void popBack();
 
+    /**
+     * @brief size - returns the size of the list
+     * @return size of the list
+     */
+    int size();
+
     /**
      * @brief DSDoublyLL::operator [] - returns data at passed index
      * @param index - index to retrieve data
@@ -246,6 +252,16 @@ void DSDoublyLL<T>::popBack(){
     tail->next = nullptr;
 }
 
+template<class T>
+int DSDoublyLL<T>::size()
+{
+    int total = 0;
+    for(DSNode<T>* current = head; current != nullptr; current = current->next){
+        total++;
+    }
+    return total;
+}
+
 template <class T>
 void DSDoublyLL<T>::insert(T data, int index){
     //ToDo: insert

test.cpp

@@ -386,12 +386,16 @@ TEST_CASE("Data_Structures_Test", "[Data_Structures_Test]"){
     }
 
     SECTION("Other Operators"){
+        // adding
         REQUIRE(numList3 == numList1 + numList2);
 
+        // adding and setting equal
         numList1 += numList2;
         REQUIRE(numList3 == numList1);
-
         numList1 = numList1Copy;
+
+        // size
+        REQUIRE(numList1.size() == 3);
     }
 
     SECTION("popping"){