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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Mocking creates uncompilable code for Kotlin, due improper `mockedConstruction` type","articleBody":"**Description**\r\n\r\nWhen user tries to use mocking for external classes UTBot creates `var mockedConstruction = null` which usage in the code cause type compatibility errors\r\n\r\n**To Reproduce**\r\n\r\nSteps to reproduce the behavior:\r\n\r\n1. In UTBot settings set `Generated test language` to `Kotlin` other leave default\r\n2. Enable `Force mocking static methods`\r\n3. Generate tests for following code\r\n```kotlin\r\nimport java.util.Random\r\n\r\nclass RandomInt {\r\n    fun multByRandom(x: Int): Int {\r\n        val random: Random = Random();\r\n        return x * random.nextInt();\r\n    }\r\n}\r\n```\r\n**Expected behavior**\r\n\r\nCompilable code is generated\r\n\r\n**Actual behavior**\r\n\r\nGenerated test cannot be compiled. See its beginning below.\r\n\r\n```kotlin\r\n    @Test\r\n    fun testMultByRandom1() {\r\n        var mockedConstruction = null\r\n        try {\r\n            val mockClassCounter = AtomicInteger()\r\n            mockedConstruction = mockConstruction(Random::class.java) { RandomMock: Random,\r\n                                                                        context: MockedConstruction.Context\r\n             -\u003e when (mockClassCounter.get()) {\r\n                    0 -\u003e {\r\n                        (`when`(RandomMock.nextInt())).thenReturn(0)\r\n                    }\r\n                }\r\n                mockClassCounter.getAndIncrement()\r\n            }\r\n```\r\n\r\n**Visual proofs (screenshots, logs, images)**\r\n\r\n![image](https://user-images.githubusercontent.com/10035839/199230422-c723e9f4-1bf4-4667-9126-a46d88cdc0b5.png)\r\n\r\n\r\n\r\n","author":{"url":"https://github.com/tyuldashev","@type":"Person","name":"tyuldashev"},"datePublished":"2022-11-01T12:22:11.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1278/UTBotJava/issues/1278"}