Test addition

src/test/test_duellist_spielesammlung_projekt.c

@@ -459,6 +459,18 @@ void test_generateRandomNumber_withinValidRange(void)
     TEST_ASSERT_TRUE(result >= 1 && result <= 100);
 }
 
+void test_addition(void)
+{
+    /* arrange */
+    int a = 5;
+    int b = 10;
+
+    /* act */
+    int result = addition(a, b);
+
+    /* assert */
+    TEST_ASSERT_EQUAL_INT(15, result);
+}