René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"JDK17: UtBot tries to mock unexported packages and creates uncompilable tests","articleBody":"**Description**\r\n\r\nOn sample code which works with network UtBot tries to create `mockStatic(sun.net.util.IPAddressUtil.class)` while `IPAddressUtill` is not exported from JDK module, so resulting tests are not compilable.\r\n\r\n**To Reproduce**\r\n\r\nSteps to reproduce the behavior:\r\n\r\n```java\r\nimport java.io.IOException;\r\nimport java.net.InetSocketAddress;\r\nimport java.net.Socket;\r\n...\r\n    public int connect(Socket socket) throws IOException {\r\n        socket.connect(new InetSocketAddress(\"0.0.0.0\", 22));\r\n        return 0;\r\n    }\r\n```\r\n\r\n1. Set JDK 17 as project JDK\r\n2. Invoke test generation for code sample above, use **\"Mock everything outside the package\"** option.\r\n3. Open generated tests\r\n\r\n**Expected behavior**\r\n\r\nGenerated test are compilable.\r\n\r\n**Actual behavior**\r\n\r\nGenerated test is not compilable, because uses internal JDK class\r\n```java\r\n    @Test(description = \"connect: -\u003e return 0\")\r\n    public void testConnect_ReturnZero() throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, IOException {\r\n        org.mockito.MockedStatic mockedStatic = null;\r\n        try {\r\n            mockedStatic = mockStatic(sun.net.util.IPAddressUtil.class);\r\n            (mockedStatic.when(() -\u003e sun.net.util.IPAddressUtil.digit(anyChar(), anyInt()))).thenReturn(0);\r\n            byte[] byteArray = new byte[16];\r\n            (mockedStatic.when(() -\u003e sun.net.util.IPAddressUtil.validateNumericFormatV4(any()))).thenReturn(byteArray);\r\n...\r\n```\r\n\r\n**Visual proofs (screenshots, logs, images)**\r\n![image](https://user-images.githubusercontent.com/10035839/228538145-f17b29a1-87b5-4e7c-8658-70ce248c9fb9.png)\r\n\r\n\r\n**Additional context**\r\n\r\nIt seems we have two options to resolve that problem:\r\n * Detect somehow that class is not exported and don't generate such tests.\r\n * Generate test as is but add some comment that user has to add those `--add-exports` manually to test run configuration, see [the same suggestion](https://github.com/UnitTestBot/UTBotJava/issues/2026#issuecomment-1481386538) for `--add-opens`. And update the docs as well - [#2047](https://github.com/UnitTestBot/UTBotJava/issues/2047)\r\n","author":{"url":"https://github.com/tyuldashev","@type":"Person","name":"tyuldashev"},"datePublished":"2023-03-29T12:55:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2070/UTBotJava/issues/2070"}