Java 比较复杂对象，不包括 JUnit 的某些字段

Question

I tried the Unitils tool which is really great, but doesn't provide you an option for excluding fields. The only way by doing this is setting null the objects and enable a flag "IGNORE_DEFAULTS", but in my case it's not helpful, since I've got some ids autogenerated by the system. So if i could just add the id to an exclude list it would be perfect.

I also tried Mockito ReflectionEquals but was not helpful, since i need a field to field comparison.

Is there something else helpful ? I 'm searching for hours without success.

Thank you in advance!

Answer 1

You could solve your problem by using AssertJ . It can do field-by-field recursive comparison with options to ignore fields by name, regex or type.

assertThat(sherlock)
  .usingRecursiveComparison()
  .ignoringFields("name", "home.address.street")
  .isEqualTo(moriarty);

Answer 2

如果您不喜欢所发现的功能，那么使用 Java 反射来推出自己的功能并不难。

Answer 3

We use our own approach in groovy (similar to Frank Neblung's answer ) where we convert an object to a formated Json string using an ObjectMapper and a filterList for the attributes. This is pretty handy for testing but has also some downsides like the loss of type information.

// interface of the conversion
String nice(Object o, String... filterList) { ... }

// test calls
assertEquals(nice(actual, ["-unusedAttribute", "-unusedAttribute2"]), nice(expected, ["-unusedAttribute", "-unusedAttribute2"]))
assertEquals(nice(actual, ["+usedAttibute", "+usedAttibute2"]), nice(expected, ["+usedAttibute", "+usedAttibute2"]))

// test calls using the spock framework
nice(actual, ["-unusedAttribute", "-unusedAttribute2"]) == nice(expected, ["-unusedAttribute", "-unusedAttribute2"])
nice(actual, ["+usedAttibute", "+usedAttibute2"]) == nice(expected, ["+usedAttibute", "+usedAttibute2"])