get instance not empty list

src/test/java/hs/fulda/de/ci/exam/project/FlightTest.java

@@ -27,6 +27,15 @@ class FlightTest {
         assertThat(flight1.getInstances()).describedAs("get flight instances of the flight ").isEqualTo(empty_list);
     }
 
+    @Test
+    void getInstances_not_empty_list_should_be_equal() {
+        HashSet<FlightInstance> list = new HashSet<>();
+        list.add(fInstance1);
+
+        flight1.flightInstances.add(fInstance1);
+        assertThat(flight1.getInstances()).describedAs("get flight instances of the flight ").isEqualTo(list);
+    }
+
     @Test
     void cancel() {
     }