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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fuzzing only test generation for Builder pattern produces an empty test class","articleBody":"**Description**\r\n\r\nTest generation using Fuzzing only mode - the Simplest - for a method instantiating a class using Builder pattern - produces an empty test class. \r\nSarif report fails to be generated. \r\nFormattingModelInconsistencyException was thrown - twice (not every run).\r\n\r\n**To Reproduce**\r\n\r\nSteps to reproduce the behavior:\r\n\r\n1. Run IntelliJ IDEA Ultimate 2022.1.4 with UTBot Java plugin installed\r\n2. Create a Gradle project with JDK 11\r\n3. Create the following class:\r\n\r\n```\r\npublic class Person {\r\n\r\n    private String lastName;\r\n    private String firstName;\r\n\r\n    private Person() {\r\n        // private constructor\r\n    }\r\n\r\n    public String getLastName() {\r\n        return lastName;\r\n    }\r\n\r\n    public String getFirstName() {\r\n        return firstName;\r\n    }\r\n\r\n    public static Builder newBuilder() {\r\n        return new Person().new Builder();\r\n    }\r\n\r\n    public class Builder {\r\n\r\n        private Builder() {\r\n            // private constructor\r\n        }\r\n\r\n        public Builder setLastName(String lastName) {\r\n            Person.this.lastName = lastName;\r\n\r\n            return this;\r\n        }\r\n\r\n        public Builder setFirstName(String firstName) {\r\n            Person.this.firstName = firstName;\r\n\r\n            return this;\r\n        }\r\n\r\n        public Person build() {\r\n            return Person.this;\r\n        }\r\n    }\r\n\r\n    public Person getSomeone(String name) {\r\n        return Person.newBuilder()\r\n                .setFirstName(name)\r\n                .setLastName(\"Last\")\r\n                .build();\r\n    }\r\n}\r\n\r\n```\r\n4. Generate a test for getSomeone method with UTBot\r\n\r\n**Expected behavior**\r\n\r\nTests are supposed to be generated.\r\n\r\n**Actual behavior**\r\n\r\nEmpty PersonTest.java class is generated and Error dialog with \"Failed to save tests report\" is displayed.\r\n\r\nOnce there was FormattingModelInconsistencyException thrown\r\n\r\n**Visual proofs (screenshots, logs, images)**\r\n\r\n![image](https://user-images.githubusercontent.com/37301492/181503806-568a0d4a-da11-4253-83f5-9ebdc72f916f.png)\r\n\r\n![image](https://user-images.githubusercontent.com/37301492/181509220-53e2da15-3ac6-4d08-a4ef-4cd130ff646c.png)\r\n\r\n```\r\ncom.intellij.formatting.FormatterImpl$FormattingModelInconsistencyException: Invalid root block PSI element\r\n\tat com.intellij.formatting.FormatterImpl.validateModel(FormatterImpl.java:707)\r\n\tat com.intellij.formatting.FormatterImpl.format(FormatterImpl.java:221)\r\n\tat com.intellij.psi.impl.source.codeStyle.CodeFormatterFacade.processRange(CodeFormatterFacade.java:117)\r\n\tat com.intellij.psi.impl.source.codeStyle.CodeFormatterFacade.processElement(CodeFormatterFacade.java:67)\r\n\tat com.intellij.formatting.service.CoreFormattingService.formatElement(CoreFormattingService.java:44)\r\n\tat com.intellij.formatting.service.FormattingServiceUtil.formatElement(FormattingServiceUtil.java:67)\r\n\tat com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.reformat(CodeStyleManagerImpl.java:82)\r\n\tat com.intellij.psi.impl.source.codeStyle.CodeStyleManagerImpl.reformat(CodeStyleManagerImpl.java:65)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController.reformat(CodeGenerationController.kt:337)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController.access$reformat(CodeGenerationController.kt:83)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController$generateCodeAndReport$1$1$1$2.run(CodeGenerationController.kt:308)\r\n\tat com.intellij.openapi.command.WriteCommandAction.lambda$runWriteCommandAction$4(WriteCommandAction.java:362)\r\n\tat com.intellij.openapi.command.WriteCommandAction$BuilderImpl.lambda$doRunWriteCommandAction$1(WriteCommandAction.java:150)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1015)\r\n\tat com.intellij.openapi.command.WriteCommandAction$BuilderImpl.lambda$doRunWriteCommandAction$2(WriteCommandAction.java:148)\r\n\tat com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:219)\r\n\tat com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:184)\r\n\tat com.intellij.openapi.command.WriteCommandAction$BuilderImpl.doRunWriteCommandAction(WriteCommandAction.java:157)\r\n\tat com.intellij.openapi.command.WriteCommandAction$BuilderImpl.run(WriteCommandAction.java:124)\r\n\tat com.intellij.openapi.command.WriteCommandAction.runWriteCommandAction(WriteCommandAction.java:362)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController$generateCodeAndReport$1$1$1.run(CodeGenerationController.kt:307)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController$run$$inlined$let$lambda$3.compute(actions.kt:58)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl.lambda$runWriteAction$13(ApplicationImpl.java:1024)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl.runWriteActionWithClass(ApplicationImpl.java:1003)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1024)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController.run(CodeGenerationController.kt:584)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController.access$run(CodeGenerationController.kt:83)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController$generateCodeAndReport$1$1.run(CodeGenerationController.kt:293)\r\n\tat org.utbot.intellij.plugin.generator.CodeGenerationController$run$$inlined$let$lambda$4.run(ApplicationUtils.kt:59)\r\n\tat com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:215)\r\n\tat com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:22)\r\n\tat com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:197)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl$3.run(ApplicationImpl.java:511)\r\n\tat com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:69)\r\n\tat com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:112)\r\n\tat com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:42)\r\n\tat java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)\r\n\tat java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)\r\n\tat java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)\r\n\tat java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)\r\n\tat java.base/java.security.AccessController.doPrivileged(Native Method)\r\n\tat java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)\r\n\tat java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)\r\n\tat com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:898)\r\n\tat com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:746)\r\n\tat com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$6(IdeEventQueue.java:439)\r\n\tat com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:803)\r\n\tat com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$7(IdeEventQueue.java:438)\r\n\tat com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:106)\r\n\tat com.intellij.ide.IdeEventQueue.performActivity(IdeEventQueue.java:604)\r\n\tat com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:436)\r\n\tat com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:873)\r\n\tat com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:484)\r\n\tat java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)\r\n\tat java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)\r\n\tat java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)\r\n\tat java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)\r\n\tat java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)\r\n\tat java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)\r\n```\r\n\r\n**Environment**\r\n\r\nIntelliJ IDEA 2022.1.4\r\nGradle project with JDK 11\r\n\r\n**Additional context**\r\n\r\nWhen Symbolic engine is turned on - even minimally - a test is generated.\r\nNot reproducing on Gradle project with JDK 8,\r\nNot reproducing on Maven and IntelliJ projects with JDK 11\r\n","author":{"url":"https://github.com/alisevych","@type":"Person","name":"alisevych"},"datePublished":"2022-07-28T12:27:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/607/UTBotJava/issues/607"}