mockkStatic 和mockkObject 不会模拟Android 中的伴生对象

Question

我有一个非常简单的课程：

class TestClass {

    companion object {
        fun sampleFunc(value: Int): Int {
            return value + 5
        }
    }
}

和一个非常简单的测试：

@Test
fun `test class`() {
    mockkObject(TestClass::class)
    every {
        TestClass.sampleFunc(any())
    } returns 11

    assertThat(TestClass.sampleFunc(5)).isEqualTo(11)
}

堆栈跟踪：

Failed matching mocking signature for

left matchers: [any()]
io.mockk.MockKException: Failed matching mocking signature for

left matchers: [any()]
    at io.mockk.impl.recording.SignatureMatcherDetector.detect(SignatureMatcherDetector.kt:99)
    at io.mockk.impl.recording.states.RecordingState.signMatchers(RecordingState.kt:39)
    at io.mockk.impl.recording.states.RecordingState.round(RecordingState.kt:31)
    at io.mockk.impl.recording.CommonCallRecorder.round(CommonCallRecorder.kt:50)
    at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:59)
    at io.mockk.impl.eval.EveryBlockEvaluator.every(EveryBlockEvaluator.kt:30)
    at io.mockk.MockKDsl.internalEvery(API.kt:92)
    at io.mockk.MockKKt.every(MockK.kt:104)

MockK 版本：1.9.3 操作系统：mac Kotlin 版本：1.5.21 JDK 版本：11 JUnit 版本：4.12

任何想法？我也尝试过mockkStatic，结果相同。

Answer 1

根据这个答案：https://github.com/mockk/mockk/issues/136#issuecomment-419879755

@Test
fun `test class`() {
    mockkObject(TestClass.Companion)
    every {
        TestClass.sampleFunc(any())
    } returns 11

    assertThat(TestClass.sampleFunc(5)).isEqualTo(11)
}

确实有效，而且确实如此。