@Test
public void compare_via_introspector_if_introspectable() {
when(introspectableResolver.isIntrospectable(node(buildRootPath()))).thenReturn(true);
beanDiffer.compare(DiffNode.ROOT, instances);
verify(introspector).introspect(instances.getType());
}
@Test
public void return_untouched_node_if_working_and_base_are_the_same_instance() {
when(instances.areNull()).thenReturn(true);
final DiffNode node = beanDiffer.compare(DiffNode.ROOT, instances);
assertThat(node).self().isUntouched();
}
@Test
public void return_removed_node_if_working_is_null_and_base_is_not() {
when(instances.hasBeenRemoved()).thenReturn(true);
final DiffNode node = beanDiffer.compare(DiffNode.ROOT, instances);
assertThat(node.getState(), is(DiffNode.State.REMOVED));
}
@Test
public void compare_via_comparisonStrategy_if_present() {
when(comparisonStrategyResolver.resolveComparisonStrategy(node(buildRootPath())))
.thenReturn(comparisonStrategy);
beanDiffer.compare(DiffNode.ROOT, instances);
verify(comparisonStrategy).compare(node(buildRootPath()), same(instances));
}
@Test
public void do_not_add_property_nodes_to_bean_node_if_they_are_not_returnable() {
given_root_node_is_introspectable();
final PropertyAwareAccessor propertyAccessor =
given_introspector_returns_PropertyAccessor("foo");
final DiffNode propertyNode =
given_DifferDispatcher_returns_Node_for_PropertyAccessor(propertyAccessor);
given_Node_is_not_returnable(propertyNode);
final DiffNode node = beanDiffer.compare(DiffNode.ROOT, instances);
Assertions.assertThat(node.hasChildren()).isFalse();
}
@Test
public void delegate_comparison_of_properties_when_comparing_via_introspector() {
given_root_node_is_introspectable();
final PropertyAwareAccessor propertyAccessor =
given_introspector_returns_PropertyAccessor("foo");
final DiffNode propertyNode =
given_DifferDispatcher_returns_Node_for_PropertyAccessor(propertyAccessor);
given_Node_is_returnable(propertyNode);
final DiffNode node = beanDiffer.compare(DiffNode.ROOT, instances);
Assertions.assertThat(node.getChild("foo")).isSameAs(propertyNode);
}