Support getters returning proxy objects (Collections.unmodifiableMap)

[a-i-ks]

Assuming I have the following DTO

class Foo {
  private Map<Integer, String> map = new LinkedHashMap<>();

  public Map<Integer, String> getMap() {
    return Collections.unmodifiableMap(map);
  }

  public void setMap(Map<Integer, String> map) {
    this.map = map != null ? Collections.unmodifiableMap(map) : Collections.emptyMap();
  }
}

The setters store an unmodifiable hash map and the getters return an unmodifiable copy of the map.

The method beanDoesNotHaveValidGetterAndSetterForProperty in AbstractBeanAccessorMatcher generates a Mockito Map and calls the setter of the class and then the getter.

The check testValue.equals(result) always evaluates to false.