commonTest.com.zegreatrob.testmints.action.async.GeneralSuspendActionDispatcherTest.kt Maven / Gradle / Ivy

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action-async

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package com.zegreatrob.testmints.action.async

import com.zegreatrob.minassert.assertIsEqualTo
import com.zegreatrob.minspy.Spy
import com.zegreatrob.minspy.SpyData
import com.zegreatrob.minspy.spyFunction
import com.zegreatrob.testmints.async.asyncSetup
import kotlin.test.Test

private typealias DivideActionDispatcher = suspend (GeneralSuspendActionDispatcherTest.DivideAction) -> Int

class GeneralSuspendActionDispatcherTest {

    data class DivideAction(val left: Int, val right: Int) : SimpleSuspendAction {
        override val performFunc = link(DivideActionDispatcher::invoke)
    }

    @Test
    fun syntaxAllowsInterceptionOfActionExecutionIncludingReplacingResult() =
        asyncSetup(object : GeneralSuspendActionDispatcherSyntax {
            val expectedReplacedResult = 127
            override val generalDispatcher = generalDispatcherSpy().apply { spyWillReturn(expectedReplacedResult) }
            val action = DivideAction(6, 7)
            val divideDispatcherSpy = SpyData()
            val divideDispatcher: DivideActionDispatcher = { divideDispatcherSpy.spyFunction(it) }
        }) exercise {
            divideDispatcher.execute(action)
        } verify { result ->
            result.assertIsEqualTo(expectedReplacedResult)
            generalDispatcher.spyReceivedValues
                .assertIsEqualTo(listOf(action to divideDispatcher))
            divideDispatcherSpy.spyReceivedValues
                .assertIsEqualTo(emptyList())
        }

    private fun generalDispatcherSpy() = object :
        GeneralSuspendActionDispatcher,
        Spy, *>, Any> by SpyData() {
        @Suppress("UNCHECKED_CAST")
        override suspend fun  dispatch(action: SuspendAction, dispatcher: D): R =
            spyFunction(action to dispatcher) as R
    }
}