MockK：在泛型函数中为不同类型的参数返回不同的结果

编程问答 2022-06-03

问题描述

我试图在我的泛型函数中为不同类型的参数返回不同的值，但是由于某种原因，仅考虑了其中一个模拟（看来是最新的）。我尝试了四种不同的方法，下面都列出了。

如果您知道可以使用Mockito或任何其他模拟框架来实现这种行为，请也告诉我

import io.mockk.MockKAnnotations
import io.mockk.every
import io.mockk.impl.annotations.MockK
import io.reactivex.Single
import org.junit.Before
import org.junit.Test
import retrofit2.Response

class MyTest {
    class A
    class B
    class MyClass() {
        fun <T> myMethod(callback: () -> Single<Response<T>>): Single<T> {
            error("")
        }
    }

    val a = A()
    val b = B()

    @MockK
    lateinit var myClass: MyClass

    @Before
    fun setUp() {
        MockKAnnotations.init(this)
    }

    @Test
    fun tmp() {
        every { myClass.myMethod<A>(any()) } returns (Single.just(a))
        every { myClass.myMethod<B>(any()) } returns (Single.just(b))
        myClass.myMethod<A> { Single.just(Response.success(a)) }.test().assertResult(a)
        myClass.myMethod<B> { Single.just(Response.success(b)) }.test().assertResult(b)
    }

    @Test
    fun tmp2() {
        every { myClass.myMethod(any<() -> Single<Response<A>>>()) } returns (Single.just(a))
        every { myClass.myMethod(any<() -> Single<Response<B>>>()) } returns (Single.just(b))
        myClass.myMethod<A> { Single.just(Response.success(a)) }.test().assertResult(a)
        myClass.myMethod<B> { Single.just(Response.success(b)) }.test().assertResult(b)
    }

    @Test
    fun tmp3() {
        every { myClass.myMethod(any<() -> Single<Response<A>>>()).hint(A::class) } returns (Single.just(a))
        every { myClass.myMethod(any<() -> Single<Response<B>>>()).hint(B::class) } returns (Single.just(b))
        myClass.myMethod<A> { Single.just(Response.success(a)) }.test().assertResult(a)
        myClass.myMethod<B> { Single.just(Response.success(b)) }.test().assertResult(b)
    }

    @Test
    fun tmp4() {
        every { myClass.myMethod<A>(any()).hint(A::class) } returns (Single.just(a))
        every { myClass.myMethod<B>(any()).hint(B::class) } returns (Single.just(b))
        myClass.myMethod<A> { Single.just(Response.success(a)) }.test().assertResult(a)
        myClass.myMethod<B> { Single.just(Response.success(b)) }.test().assertResult(b)
    }
}

每种方法显示的错误：


java.lang.AssertionError: Values at position 0 differ; expected: my.packagge.MyTest$A@130a0f66 (class: A) but was: my.packagge.MyTest$B@4c432866 (class: B) (latch = 0,values = 1,errors = 0,completions = 1)
Expected :my.packagge.MyTest$A@130a0f66 (class: A)
Actual   :my.packagge.MyTest$B@4c432866 (class: B) (latch = 0,completions = 1)
<Click to see difference>


    at io.reactivex.observers.BaseTestConsumer.fail(BaseTestConsumer.java:189)
    at io.reactivex.observers.BaseTestConsumer.assertValues(BaseTestConsumer.java:545)
    at io.reactivex.observers.BaseTestConsumer.assertResult(BaseTestConsumer.java:796)
    at my.packagge.MyTest.tmp(MyTest.kt:35)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runchild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runchild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runchildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)

谢谢！

解决方法

再试一次。我不确定是否有更好的方法。

=A1 & " " & A2
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