Can`t mock private property (Missing mocked calls inside every { ... } block: make sure the object inside the block is a mock)

[oSumAtrIX]

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed (Kinda? There are similar issues but none specifically for this one)

Expected Behavior

The property speed is correctly mocked:

  class Team {
      private var speed = 0
  }

  val mock = spyk(Team(), recordPrivateCalls = true)
  every { mock getProperty "speed" } returns 33

Current Behavior

An exception is thrown.

Steps to Reproduce

Merely this code example similar to the one from the docs fails:

  class Team {
      private var speed = 0
  }

  val mock = spyk(Team(), recordPrivateCalls = true)
  every { mock getProperty "speed" } returns 33

Context

Please provide any relevant information about your setup. This is important in case the issue is not reproducible except for under certain conditions.

• MockK version: 1.13.10
• OS: Windows
• Kotlin version: 1.9.22
• JDK version: 11
• Type of test: Unit test

Failure Logs

Please include any relevant log snippets or files here.

Stack trace

io.mockk.MockKException: Missing mocked calls inside every { ... } block: make sure the object inside the block is a mock
	at io.mockk.impl.recording.states.StubbingState.checkMissingCalls(StubbingState.kt:14)
	at io.mockk.impl.recording.states.StubbingState.recordingDone(StubbingState.kt:8)
	at io.mockk.impl.recording.CommonCallRecorder.done(CommonCallRecorder.kt:47)
	at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:63)
	at io.mockk.impl.eval.EveryBlockEvaluator.every(EveryBlockEvaluator.kt:30)
	at io.mockk.MockKDsl.internalEvery(API.kt:94)
	at io.mockk.MockKKt.every(MockK.kt:143)

Minimal reproducible code (the gist of this issue)

package io.mockk.gh

import io.mockk.every
import io.mockk.mockk
import kotlin.test.Test

class IssueTest {
    @Test
    fun test() {
		  class Team {
		      private var speed = 0
		  }
		
		  val mock = spyk(Team(), recordPrivateCalls = true)
		  every { mock getProperty "speed" } returns 33
    }
}

[oSumAtrIX]

Current workaround:

  private fun Any.setPrivateField(field: String, value: Any) {
        this::class.java.getDeclaredField(field).apply {
            this.isAccessible = true
            set(this@setPrivateField, value)
        }
    }