test: ldp toString displays date and timezone

assignment/src/test/java/appointmentplanner/LocalDayPlanTest.java

@@ -40,4 +40,12 @@ public class LocalDayPlanTest {
     assertThat(plan.startOfDay()).isEqualTo(start);
     assertThat(plan.endOfDay()).isEqualTo(end);
   }
+
+  @ParameterizedTest
+  @MethodSource("provideLocalDPDataset")
+  void ldToString_shouldReturnStringContainingLocalDateAndTimeZone(LocalDay day, Instant start, Instant end) {
+    LocalDayPlan plan = new LocalDayPlanImpl(day, start, end);
+
+    assertThat(plan.toString()).contains(day.zone().toString(), day.date().toString());
+  }
 }