在android单元测试中模拟挂起的函数调用

我想测试一个名为

withCredentials

的函数，该函数用于传递使用用户凭据进行API调用所需的参数，如下所示：

@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
internal suspend fun <T> withCredentials(block: suspend (String) -> Response<T>): ServiceResponse<T> 

val response = withCredentials{ bearer ->  service.logIn(bearer, userName, password) }

fun `test with credentials is calls nothing when there are no credentials saved`() {
    runBlocking {
        whenever(prefs.auth).thenReturn(null)
        
        val response = withCredentials(this@CoreTests::testSuccess)

        assertEquals(0, called)

    }
}


private var called = 0
private suspend fun testSuccess(bearer: String?): Response<String> {
        delay(1)
        called++
        return Response.success(200, "$bearer test")
    }

private val functionCall = mock(suspend (String?)-> ServiceResponse<String>) //this is ofc incorrect I need the correct code here

fun `test with credentials is calls nothing when there are no credentials saved`() {
    runBlocking {
        whenever(prefs.auth).thenReturn(null)
        
        val response = withCredentials(this@CoreTests::testSuccess)

        verify(functionCall,never()).invoke(any())

    }
}   

我希望测试withCredentials方法，而不需要测试特定的场景（例如，在登录过程中调用上述方法）

我现在做的是这样的：

@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
internal suspend fun <T> withCredentials(block: suspend (String) -> Response<T>): ServiceResponse<T> 

val response = withCredentials{ bearer ->  service.logIn(bearer, userName, password) }

fun `test with credentials is calls nothing when there are no credentials saved`() {
    runBlocking {
        whenever(prefs.auth).thenReturn(null)
        
        val response = withCredentials(this@CoreTests::testSuccess)

        assertEquals(0, called)

    }
}


private var called = 0
private suspend fun testSuccess(bearer: String?): Response<String> {
        delay(1)
        called++
        return Response.success(200, "$bearer test")
    }

private val functionCall = mock(suspend (String?)-> ServiceResponse<String>) //this is ofc incorrect I need the correct code here

fun `test with credentials is calls nothing when there are no credentials saved`() {
    runBlocking {
        whenever(prefs.auth).thenReturn(null)
        
        val response = withCredentials(this@CoreTests::testSuccess)

        verify(functionCall,never()).invoke(any())

    }
}   

fun`testwithcredentials是在没有保存凭据时调用nothing`（）{
运行阻塞{
无论何时（prefs.auth）.thenReturn（null）
val响应=withCredentials(this@CoreTests：：testSuccess）
assertEquals（0，已调用）
}
}
调用的私有变量=0
private-suspend-fun-testSuccess（承载者：字符串？）：响应{
延迟（1）
叫++
返回响应。成功（200，“$承载测试”）
}

为了验证（在本例中）在没有保存凭据时从未调用testSuccess

有没有办法模拟suspend函数，这样我就可以执行以下操作：

@VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
internal suspend fun <T> withCredentials(block: suspend (String) -> Response<T>): ServiceResponse<T> 

val response = withCredentials{ bearer ->  service.logIn(bearer, userName, password) }

fun `test with credentials is calls nothing when there are no credentials saved`() {
    runBlocking {
        whenever(prefs.auth).thenReturn(null)
        
        val response = withCredentials(this@CoreTests::testSuccess)

        assertEquals(0, called)

    }
}


private var called = 0
private suspend fun testSuccess(bearer: String?): Response<String> {
        delay(1)
        called++
        return Response.success(200, "$bearer test")
    }

private val functionCall = mock(suspend (String?)-> ServiceResponse<String>) //this is ofc incorrect I need the correct code here

fun `test with credentials is calls nothing when there are no credentials saved`() {
    runBlocking {
        whenever(prefs.auth).thenReturn(null)
        
        val response = withCredentials(this@CoreTests::testSuccess)

        verify(functionCall,never()).invoke(any())

    }
}   

private val functionCall=mock（挂起（字符串？->servicesponse）//这是ofc不正确的我需要正确的代码
fun`testwithcredentials是在没有保存凭据时调用nothing`（）{
运行阻塞{
无论何时（prefs.auth）.thenReturn（null）
val响应=withCredentials(this@CoreTests：：testSuccess）
验证（functionCall，never（））。调用（any（））
}
}