tests: extract closeAndDeleteProject, move to testUtils

idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/testUtils.kt

@@ -16,9 +16,11 @@
 
 package org.jetbrains.kotlin.idea.test
 
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.module.Module
 import com.intellij.openapi.roots.ModifiableRootModel
 import com.intellij.openapi.roots.ModuleRootModificationUtil.updateModel
+import com.intellij.testFramework.LightPlatformTestCase
 import com.intellij.testFramework.LightProjectDescriptor
 import com.intellij.util.Consumer
 import org.jetbrains.kotlin.diagnostics.Severity
@@ -65,3 +67,6 @@ public fun JetFile.dumpTextWithErrors(): String {
     return header + getText()
 }
 
+public fun closeAndDeleteProject(): Unit =
+    ApplicationManager.getApplication().runWriteAction() { LightPlatformTestCase.closeAndDeleteProject() }
+

idea/tests/org/jetbrains/kotlin/idea/decompiler/navigation/NavigateToStdlibSourceRegressionTest.java

@@ -16,12 +16,11 @@
 
 package org.jetbrains.kotlin.idea.decompiler.navigation;
 
-import com.intellij.openapi.application.ApplicationManager;
 import com.intellij.psi.PsiElement;
-import com.intellij.testFramework.LightPlatformTestCase;
 import com.intellij.testFramework.LightProjectDescriptor;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.idea.test.ProjectDescriptorWithStdlibSources;
+import org.jetbrains.kotlin.idea.test.TestPackage;
 
 public class NavigateToStdlibSourceRegressionTest extends NavigateToLibraryRegressionTest {
     /**
@@ -34,16 +33,11 @@ public class NavigateToStdlibSourceRegressionTest extends NavigateToLibraryRegre
 
     @Override
     protected void tearDown() throws Exception {
+        super.tearDown();
         // Workaround for IDEA's bug during tests.
         // After tests IDEA disposes VirtualFiles within LocalFileSystem, but doesn't rebuild indices.
         // This causes library source files to be impossible to find via indices
-        super.tearDown();
-        ApplicationManager.getApplication().runWriteAction(new Runnable() {
-            @Override
-            public void run() {
-                LightPlatformTestCase.closeAndDeleteProject();
-            }
-        });
+        TestPackage.closeAndDeleteProject();
     }
 
     @NotNull

idea/tests/org/jetbrains/kotlin/idea/decompiler/navigation/NavigateToStdlibSourceTest.kt

@@ -16,13 +16,12 @@
 
 package org.jetbrains.kotlin.idea.decompiler.navigation
 
-import com.intellij.openapi.application.ApplicationManager
 import com.intellij.psi.PsiElement
-import com.intellij.testFramework.LightPlatformTestCase
 import junit.framework.TestCase
 import org.jetbrains.kotlin.idea.JetFileType
 import org.jetbrains.kotlin.idea.test.KotlinCodeInsightTestCase
 import org.jetbrains.kotlin.idea.test.ModuleKind
+import org.jetbrains.kotlin.idea.test.closeAndDeleteProject
 import org.jetbrains.kotlin.idea.test.configureAs
 
 public class NavigateToStdlibSourceTest : KotlinCodeInsightTestCase() {
@@ -51,16 +50,11 @@ public class NavigateToStdlibSourceTest : KotlinCodeInsightTestCase() {
     }
 
     override fun tearDown() {
-        // Copied verbatim from NavigateToStdlibSourceRegressionTest.
+        super.tearDown()
         // Workaround for IDEA's bug during tests.
         // After tests IDEA disposes VirtualFiles within LocalFileSystem, but doesn't rebuild indices.
         // This causes library source files to be impossible to find via indices
-        super.tearDown()
-        ApplicationManager.getApplication().runWriteAction(object : Runnable {
-            override fun run() {
-                LightPlatformTestCase.closeAndDeleteProject()
-            }
-        })
+        closeAndDeleteProject()
     }
 
     protected fun configureAndResolve(