### Question:
PropertyList extends Property { public PropertyList deepCopy(boolean keepId) { PropertyList copy = new PropertyList(this, keepId); for (Property property : list) { copy.add(property.deepCopy(false)); } return copy; } PropertyList();  PropertyList(@NotNull String name); protected  PropertyList(PropertyList original, boolean keepId);  PropertyList(@NotNull String name, @NotNull Property... startingList); @NotNull List<Property> getList(); void setList(List<Property> list); void add(@NotNull Property property); @Override boolean equals(Object obj); @Override int hashCode(); PropertyList deepCopy(boolean keepId); void afterUnmarshal(Object u, Object parent);  }### Answer:
@Test public void deepCopyShouldCopyAllSimpleFields() { PropertyList original = createPropertyList(); PropertyList copy = original.deepCopy(true); assertNotSame(copy, original, "The copy should not reference the original object"); assertEquals(copy.getId(), original.getId(), "Failed to copy the id property"); assertEquals(copy.getName(), original.getName(), "Failed to copy the name property"); assertEquals(copy.getErrorMessage(), original.getErrorMessage(), "Failed to copy the errorMessage property"); }
@Test public void deepCopyShouldNotCopyIdFieldWhenFlagIsFalse() { PropertyList original = createPropertyList(); PropertyList copy = original.deepCopy(false); assertFalse(copy.getId() == original.getId(), "The original id property should not be copied."); assertEquals(copy.getName(), original.getName(), "Failed to copy the name property"); assertEquals(copy.getErrorMessage(), original.getErrorMessage(), "Failed to copy the errorMessage property"); }