Spring Support: Test framework

compiler/tests/org/jetbrains/kotlin/test/util/jetTestUtils.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.test.util
 import com.intellij.openapi.util.io.FileUtil
 import com.intellij.psi.*
 import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.testFramework.UsefulTestCase
 import com.intellij.testFramework.fixtures.CodeInsightTestFixture
 import com.intellij.util.SmartFMap
 import org.jetbrains.kotlin.psi.KtDeclaration
@@ -73,4 +74,6 @@ fun PsiFile.findElementsByCommentPrefix(prefix: String): Map<PsiElement, String>
             }
     )
     return result
-}
+}
+
+inline fun <reified T: Any> Any?.assertInstanceOf() = UsefulTestCase.assertInstanceOf(this, T::class.java)