Minor: find tested element with <caret> in ResolveElementCacheTest.kt

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

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.test.util
 
 import com.intellij.psi.*
 import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.testFramework.fixtures.CodeInsightTestFixture
 import com.intellij.util.SmartFMap
 import org.jetbrains.kotlin.psi.KtDeclaration
 import org.jetbrains.kotlin.psi.KtPackageDirective
@@ -59,4 +60,9 @@ fun PsiFile.findElementsByCommentPrefix(prefix: String): Map<PsiElement, String>
 
 fun findLastModifiedFile(dir: File, skipFile: (File) -> Boolean): File {
     return dir.walk().filterNot(skipFile).maxBy { it.lastModified() }!!
-}
+}
+
+val CodeInsightTestFixture.elementByOffset: PsiElement
+    get() {
+        return file.findElementAt(editor.caretModel.offset) ?: error("Can't find element at offset. Probably <caret> is missing.")
+    }