一个自定义的spock注释来处理应用和清理元类更改？

Question

@ConfineMetaClassChanges(Bar) -- this will cleanup the metaclass changes
class FooSpec extends Specification {

  def setupSpec() {
    BarHelper.setupMetaClass() -- this applies the metaclass changes
  }

  def "test Foo"() {
    given:
      def bar = createBar()
      def foo = createFoo(bar.x, bar.y)
    ...
  }

}

class BarHelper {
  static def setupMetaClass() {
    Bar.metaclass.x = { ... }
    Bar.metaclass.y = { ... }
  }

@UsingBar -- internally, calls BarHelper.setupMetaClass(), and 
          -- also invokes @ConfineMetaClassChanges(Bar)
class FooSpec extends Specification {

  -- no need for setupSpec() method now

  def "test Foo"() {
    given:
      def bar = createBar()
      def foo = createFoo(bar.x, bar.y)
    ...
  }

}

Answer 1

我想我找到了一个更简单的解决方案：使用groovy类别和Spock@use注释：

class BarCategory {
  static getX(Bar bar) { ... }
  static getY(Bar bar) { ... }
}

@Uses(BarCategory)
public class FooSpec extends Specification {

  def "test Foo"() {
    given:
      def bar = createBar()
      def foo = createFoo(bar.x, bar.y)
      ...
  }

}

这相当于以下内容：

def "test Foo"() {
  given:
    uses(BarCategory) {
      def bar = createBar()
      def foo = createFoo(bar.x, bar.y)
    }
    ...

}