+ @Test
+ @DisplayName("An existing sum is removed, if ended")
+ public void testEndSumRemovesSumIfSumExists()
+ {
+ SumBusinessLogic sumBusinessLogic = new SumBusinessLogic();
+ sumBusinessLogic.startSum("foo");
+ sumBusinessLogic.endSum("foo");
+ assertThat(sumBusinessLogic.getSum("foo")).isEmpty();
+ }
+