NullPointerException on test case deletion

[Vladislav0Art]

Describe the bug
Deletion of a test case inflicted a NullPointerException.

To Reproduce
I missed the entire sequence of actions that led to the error, but I did not follow, and the error occurred (these steps may not yield the error!):

1. Generate tests via LLM.
2. Go to the last one and request LLM to change it (I wrote "why does it fail?" prompt; maybe the test name or its member function name changed).
3. Press delete button.
4. See error.

Expected behavior
Either a test case gets deleted or no-op.

Additional context
See a full stack trace below; here is the part of our code:

java.lang.NullPointerException
	at org.jetbrains.research.testspark.display.generatedTests.GenerateTestsTabHelper.removeTestCase(GenerateTestsTabHelper.kt:11)
	at org.jetbrains.research.testspark.display.generatedTests.TestCasePanelBuilder.remove(TestCasePanelBuilder.kt:608)
	at org.jetbrains.research.testspark.display.generatedTests.TestCasePanelBuilder.getBottomPanel$lambda$10(TestCasePanelBuilder.kt:303)

The full stack trace is as follows:

java.lang.NullPointerException
	at org.jetbrains.research.testspark.display.generatedTests.GenerateTestsTabHelper.removeTestCase(GenerateTestsTabHelper.kt:11)
	at org.jetbrains.research.testspark.display.generatedTests.TestCasePanelBuilder.remove(TestCasePanelBuilder.kt:608)
	at org.jetbrains.research.testspark.display.generatedTests.TestCasePanelBuilder.getBottomPanel$lambda$10(TestCasePanelBuilder.kt:303)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2313)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
	at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
	at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279)
	at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6657)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3385)
	at java.desktop/java.awt.Component.processEvent(Component.java:6422)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5027)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4855)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4969)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4583)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4524)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2809)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4855)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:794)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:739)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:733)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:766)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:764)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:763)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:698)
	at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.kt:637)
	at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$10(IdeEventQueue.kt:584)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithEnabledImplicitRead(RwLockHolder.kt:138)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithImplicitRead(RwLockHolder.kt:129)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:584)
	at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:77)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:362)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:361)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:843)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:361)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:356)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1021)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:114)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1021)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:356)
	at com.intellij.openapi.application.impl.RwLockHolder.runIntendedWriteActionOnCurrentThread(RwLockHolder.kt:209)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:830)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:398)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)
2024-09-24 16:02:12,466 [ 213451] SEVERE - #c.i.i.p.PluginManager - IntelliJ IDEA 2024.1  Build #IC-241.14494.240
2024-09-24 16:02:12,466 [ 213451] SEVERE - #c.i.i.p.PluginManager - JDK: 17.0.10; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o.
2024-09-24 16:02:12,466 [ 213451] SEVERE - #c.i.i.p.PluginManager - OS: Mac OS X
2024-09-24 16:02:12,466 [ 213451] SEVERE - #c.i.i.p.PluginManager - Plugin to blame: TestSpark version: 0.2.1
2024-09-24 16:02:12,466 [ 213451] SEVERE - #c.i.i.p.PluginManager - Last Action: EditorBackSpace

[dragoi75]

I could replicate the same issue by changing the generated test's name and then attempting to delete the test. It leads to the same error as above, and the test not being deleted:

java.lang.NullPointerException
	at org.jetbrains.research.testspark.display.generatedTests.GenerateTestsTabHelper.removeTestCase(GenerateTestsTabHelper.kt:11)
	at org.jetbrains.research.testspark.display.generatedTests.TestCasePanelBuilder.remove(TestCasePanelBuilder.kt:617)
	at org.jetbrains.research.testspark.display.generatedTests.TestCasePanelBuilder.getBottomPanel$lambda$10(TestCasePanelBuilder.kt:305)

[Vladislav0Art]

@dragoi75 Hi!
Thanks for pointing to the reproduction steps! Taking this into work.