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我正在尝试模拟具有不同数量参数的重载方法的 Java 通用接口。接口代码为：

import java.util.concurrent.Callable;

public interface GOInterface<T> {
    void send(T record);
    void send(T record, Callable<T> onComplete);
}

我尝试使用 onComplete 功能模拟发送，如下所示：

导入 java.util.concurrent.Callable

import org.scalamock.scalatest.MockFactory
import org.scalatest.{FlatSpec, Matchers}

class JavaInterfaceTest extends FlatSpec with Matchers with MockFactory {
  behavior of "scalamock"

  it should "mock java generic interface with overloaded method (with different number of parameters)" in {
    var result = ""
    val m = mock[GOInterface[String]]
    (m.send(_: String, _: Callable[String])).expects(*, *)
      .onCall{ case(s: String, c: Callable[String]) => c.call()}.once

    m.send("hello", new Callable[String] {
      override def call(): String = {result = "world"; result}
    })

    result should be("world")
  }


  it should "mock java generic interface with overloaded method (with different number of parameters) 2" in {
    var result = ""
    val m = mock[GOInterface[String]]
    (m.send(_: String)).expects(*).once

    m.send("hello")

    result should be("")
  }
}

我从编译器得到的错误是：

error: value expects is not a member of (String, java.util.concurrent.Callable[String]) => Unit
[ERROR]     (m.send(_: String, _: Callable[String])).expects(*, *)
[ERROR]                                              ^

error: value expects is not a member of String => Unit
[ERROR]     (m.send(_: String)).expects(*).once
[ERROR]

查看 ScalaMock git上的不同示例，我可以看到没有测试可以检查具有不同参数计数的重载方法的通用接口。

我的依赖是：

        <dependency>
            <groupId>org.scalamock</groupId>
            <artifactId>scalamock-scalatest-support_2.11</artifactId>
            <version>3.6.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.scalamock</groupId>
            <artifactId>scalamock-core_2.11</artifactId>
            <version>3.6.0</version>
            <scope>test</scope>
        </dependency>

同时，我在 ScalaMock 存储库中创建了一个错误。

4

2 回答 2

1

首先，我建议升级到最新版本的 ScalaMock，但可能也存在围绕泛型和重载的极端情况。

为了解决这个问题，在许多情况下，首先锁定类型会有所帮助，然后创建一个模拟：

trait StringGoInterface extends GoInterface[String]
val m = mock[StringGoInterface]
于 2018-05-06T10:41:50.517 回答
1

我设法克服了这个问题。不是最干净的方式，而是它的作品。正如@PhilippM 建议的那样，我需要修复类型，但不幸的是这还不够，我需要创建一个虚拟类。这是对我有用的解决方案：

class JavaInterfaceTest extends FlatSpec with Matchers with MockFactory {
  behavior of "scalamock"

  class StringInterface extends GOInterface[String] {
    override def send(record: String): Unit = ()

    override def send(record: String, onComplete: Callable[String]): Unit = ()
  }

  val call: (String, Callable[String]) => Unit = { case(s: String, c: Callable[String]) => c.call()}

  it should "mock java generic interface with overloaded method (with different number of parameters)" in {
    var result = ""
    val m = mock[StringInterface]
    (m.send(_: String, _: Callable[String])).expects(*, *)
      .onCall{ call }.once

    m.send("hello", new Callable[String] {
      override def call(): String = {result = "world"; result}
    })

    result should be("world")
  }


  it should "mock java generic interface with overloaded method (with different number of parameters) 2" in {
    var result = ""
    val m = mock[StringInterface]
    (m.send(_: String)).expects(*).once

    m.send("hello")

    result should be("")
  }
}

我觉得这有点难看，当需要模拟更复杂的接口时可能会更糟，但我希望它对其他人有所帮助。

于 2018-05-07T08:13:19.250 回答