在模拟类scala中初始化变量

我不确定我是否正确理解了您的问题,但请尝试下面的自包含代码片段,如果不够清楚,请告诉我:

import org.junit.runner.RunWith
import org.scalatest.junit.JUnitRunner
import org.scalatest.mockito.MockitoSugar
import org.scalatest.{FunSuite, Matchers}
import org.mockito.Mockito.when

@RunWith(classOf[JUnitRunner])
class MyTest extends FunSuite with Matchers with MockitoSugar {

  trait MyMock {
    def answer: Int
  }

  test("my mock") {
    val myMock = mock[MyMock]
    when(myMock.answer).thenReturn(42)

    myMock.answer should be(42)
  }
}