diff --git a/idea/tests/org/jetbrains/kotlin/idea/caches/resolve/PsiElementChecker.kt.201 b/idea/tests/org/jetbrains/kotlin/idea/caches/resolve/PsiElementChecker.kt.201
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+++ b/idea/tests/org/jetbrains/kotlin/idea/caches/resolve/PsiElementChecker.kt.201
@@ -0,0 +1,120 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.caches.resolve
+
+import com.intellij.openapi.util.Key
+import com.intellij.psi.*
+import org.jetbrains.kotlin.asJava.elements.KtLightElement
+import org.jetbrains.kotlin.asJava.elements.KtLightModifierList
+import org.jetbrains.kotlin.idea.KotlinLanguage
+import org.junit.Assert
+
+object PsiElementChecker {
+    val TEST_DATA_KEY = Key.create<Int>("Test Key")
+
+    fun checkPsiElementStructure(lightClass: PsiClass) {
+        checkPsiElement(lightClass)
+
+        lightClass.methods.forEach {
+            it.parameterList.parameters.forEach { checkPsiElement(it) }
+            checkPsiElement(it)
+        }
+
+        lightClass.fields.forEach { checkPsiElement(it) }
+
+        lightClass.innerClasses.forEach { checkPsiElementStructure(it) }
+    }
+
+    private fun checkPsiElement(element: PsiElement) {
+        if (element !is KtLightElement<*, *> && element !is KtLightModifierList<*>) return
+
+        if (element is PsiModifierListOwner) {
+            val modifierList = element.modifierList
+            if (modifierList != null) {
+                checkPsiElement(modifierList)
+            }
+        }
+
+        if (element is PsiTypeParameterListOwner) {
+            val typeParameterList = element.typeParameterList
+            if (typeParameterList != null) {
+                checkPsiElement(typeParameterList)
+                typeParameterList.typeParameters.forEach { checkPsiElement(it) }
+            }
+        }
+
+        with(element) {
+            try {
+                Assert.assertEquals("Number of methods has changed. Please update test.", 56, PsiElement::class.java.methods.size)
+
+                project
+                Assert.assertTrue(language == KotlinLanguage.INSTANCE)
+                manager
+                children
+                parent
+                firstChild
+                lastChild
+                nextSibling
+                prevSibling
+                containingFile
+                textRange
+                //textRangeInParent - throws an exception for non-physical elements, it is expected behaviour
+                startOffsetInParent
+                textLength
+                findElementAt(0)
+                findReferenceAt(0)
+                textOffset
+                text
+                textToCharArray()
+                navigationElement
+                originalElement
+                textMatches("")
+                Assert.assertTrue(textMatches(this))
+                textContains('a')
+                accept(PsiElementVisitor.EMPTY_VISITOR)
+                acceptChildren(PsiElementVisitor.EMPTY_VISITOR)
+
+                val copy = copy()
+                Assert.assertTrue(copy == null || copy::class.java == this::class.java)
+
+                // Modify methods:
+                // add(this)
+                // addBefore(this, lastChild)
+                // addAfter(firstChild, this)
+                // checkAdd(this)
+                // addRange(firstChild, lastChild)
+                // addRangeBefore(firstChild, lastChild, lastChild)
+                // addRangeAfter(firstChild, lastChild, firstChild)
+                // delete()
+                // checkDelete()
+                // deleteChildRange(firstChild, lastChild)
+                // replace(this)
+
+                Assert.assertTrue(isValid)
+                isWritable
+                @Suppress("UnstableApiUsage") ownReferences
+                reference
+                references
+                putCopyableUserData(TEST_DATA_KEY, 12)
+
+                Assert.assertTrue(getCopyableUserData(TEST_DATA_KEY) == 12)
+                // Assert.assertTrue(copy().getCopyableUserData(TEST_DATA_KEY) == 12) { this } Doesn't work
+
+                // processDeclarations(...)
+
+                context
+                isPhysical
+                resolveScope
+                useScope
+                node
+                toString()
+                Assert.assertTrue(isEquivalentTo(this))
+            } catch (t: Throwable) {
+                throw AssertionErrorWithCause("Failed for ${this::class.java} ${this}", t)
+            }
+        }
+    }
+}
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