Introduce Type Parameter

#KT-13155 Fixed

ChangeLog.md

@@ -118,6 +118,10 @@ These artifacts include extensions for the types available in the latter JDKs, s
 - [`KT-13216`](https://youtrack.jetbrains.com/issue/KT-13216) Move: Report separate conflicts for each property accessor
 - [`KT-13216`](https://youtrack.jetbrains.com/issue/KT-13216) Move: Forbid moving of enum entries
 
+##### New features
+
+- [`KT-13155`](https://youtrack.jetbrains.com/issue/KT-13155) Implement "Introduce Type Parameter" refactoring
+
 ## 1.0.4
 
 ### Compiler

compiler/frontend/src/org/jetbrains/kotlin/resolve/BindingContextUtils.kt

@@ -32,7 +32,9 @@ import org.jetbrains.kotlin.resolve.calls.context.ResolutionContext
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfo
 import org.jetbrains.kotlin.resolve.scopes.LexicalScope
 import org.jetbrains.kotlin.resolve.scopes.utils.takeSnapshot
+import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.expressions.typeInfoFactory.noTypeInfo
+import org.jetbrains.kotlin.types.typeUtil.makeNotNullable
 import org.jetbrains.kotlin.util.slicedMap.ReadOnlySlice
 
 operator fun <K, V: Any> BindingContext.get(slice: ReadOnlySlice<K, V>, key: K): V? = get(slice, key)
@@ -98,4 +100,16 @@ fun KtExpression.getReferenceTargets(context: BindingContext): Collection<Declar
 }
 
 fun KtTypeReference.getAbbreviatedTypeOrType(context: BindingContext) =
-        context[BindingContext.ABBREVIATED_TYPE, this] ?: context[BindingContext.TYPE, this]
+        context[BindingContext.ABBREVIATED_TYPE, this] ?: context[BindingContext.TYPE, this]
+
+fun KtTypeElement.getAbbreviatedTypeOrType(context: BindingContext): KotlinType? {
+    val parent = parent
+    return when (parent) {
+        is KtTypeReference -> parent.getAbbreviatedTypeOrType(context)
+        is KtNullableType -> {
+            val outerType = parent.getAbbreviatedTypeOrType(context)
+            if (this is KtNullableType) outerType else outerType?.makeNotNullable()
+        }
+        else -> null
+    }
+}

generators/src/org/jetbrains/kotlin/generators/tests/GenerateTests.kt

@@ -782,6 +782,7 @@ fun main(args: Array<String>) {
             model("refactoring/introduceParameter", pattern = KT_OR_KTS, testMethod = "doIntroduceSimpleParameterTest")
             model("refactoring/introduceLambdaParameter", pattern = KT_OR_KTS, testMethod = "doIntroduceLambdaParameterTest")
             model("refactoring/introduceJavaParameter", extension = "java", testMethod = "doIntroduceJavaParameterTest")
+            model("refactoring/introduceTypeParameter", pattern = KT_OR_KTS, testMethod = "doIntroduceTypeParameterTest")
             model("refactoring/introduceTypeAlias", pattern = KT_OR_KTS, testMethod = "doIntroduceTypeAliasTest")
         }
 

idea/src/META-INF/plugin.xml

@@ -162,10 +162,16 @@
       <add-to-group group-id="IntroduceActionsGroup" anchor="after" relative-to-action="ExtractFunction"/>
     </action>
 
+    <action id="IntroduceTypeParameter" class="org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeParameter.IntroduceTypeParameterAction"
+            text="T_ype Parameter...">
+      <keyboard-shortcut keymap="$default" first-keystroke="control alt shift Y"/>
+      <add-to-group group-id="IntroduceActionsGroup" anchor="after" relative-to-action="ExtractFunctionToScope"/>
+    </action>
+
     <action id="IntroduceTypeAlias" class="org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeAlias.IntroduceTypeAliasAction"
             text="Type _Alias...">
       <keyboard-shortcut keymap="$default" first-keystroke="control alt shift A"/>
-      <add-to-group group-id="IntroduceActionsGroup" anchor="after" relative-to-action="ExtractFunctionToScope"/>
+      <add-to-group group-id="IntroduceActionsGroup" anchor="after" relative-to-action="IntroduceTypeParameter"/>
     </action>
 
     <!-- Kotlin Console REPL-->

idea/src/org/jetbrains/kotlin/idea/quickfix/createFromUsage/createTypeParameter/CreateTypeParameterByRefActionFactory.kt

@@ -53,18 +53,22 @@ object CreateTypeParameterByRefActionFactory : KotlinIntentionActionFactoryWithD
         return ktUserType
     }
 
-    override fun extractFixData(element: KtUserType, diagnostic: Diagnostic): CreateTypeParameterData? {
-        val name = element.referencedName ?: return null
+    fun extractFixData(element: KtTypeElement, newName: String): CreateTypeParameterData? {
         val declaration = element.parents.firstOrNull {
             it is KtProperty || it is KtNamedFunction || it is KtClass
         } as? KtTypeParameterListOwner ?: return null
         val containingDescriptor = declaration.resolveToDescriptor()
-        val fakeTypeParameter = createFakeTypeParameterDescriptor(containingDescriptor, name)
+        val fakeTypeParameter = createFakeTypeParameterDescriptor(containingDescriptor, newName)
         val upperBoundType = getUnsubstitutedTypeConstraintInfo(element)?.let {
             it.performSubstitution(it.typeParameter.typeConstructor to TypeProjectionImpl(fakeTypeParameter.defaultType))?.upperBound
         }
         if (upperBoundType != null && upperBoundType.containsError()) return null
-        return CreateTypeParameterData(name, declaration, upperBoundType, fakeTypeParameter)
+        return CreateTypeParameterData(newName, declaration, upperBoundType, fakeTypeParameter)
+    }
+
+    override fun extractFixData(element: KtUserType, diagnostic: Diagnostic): CreateTypeParameterData? {
+        val name = element.referencedName ?: return null
+        return extractFixData(element, name)
     }
 
     override fun createFixes(

idea/src/org/jetbrains/kotlin/idea/quickfix/createFromUsage/createTypeParameter/CreateTypeParameterFromUsageFix.kt

@@ -42,16 +42,21 @@ import org.jetbrains.kotlin.types.typeUtil.isNullableAny
 import org.jetbrains.kotlin.utils.SmartList
 
 class CreateTypeParameterFromUsageFix(
-        originalElement: KtUserType,
+        originalElement: KtTypeElement,
         private val data: CreateTypeParameterData
-) : CreateFromUsageFixBase<KtUserType>(originalElement) {
+) : CreateFromUsageFixBase<KtTypeElement>(originalElement) {
     override fun getText() = "Create type parameter '${data.name}' in " +
                              ElementDescriptionUtil.getElementDescription(data.declaration, UsageViewTypeLocation.INSTANCE) + " '${data.declaration.name}'"
 
     override fun startInWriteAction() = false
 
     override fun invoke(project: Project, editor: Editor?, file: KtFile) {
+        doInvoke()
+    }
+
+    fun doInvoke(): KtTypeParameter? {
         val declaration = data.declaration
+        val project = declaration.project
         val usages = project.runSynchronouslyWithProgress("Searching ${declaration.name}...", true) {
             runReadAction {
                 ReferencesSearch
@@ -62,9 +67,9 @@ class CreateTypeParameterFromUsageFix(
                         }
                         .toSet()
             }
-        } ?: return
+        } ?: return null
 
-        runWriteAction {
+        return runWriteAction {
             val psiFactory = KtPsiFactory(project)
 
             val elementsToShorten = SmartList<KtElement>()
@@ -76,7 +81,8 @@ class CreateTypeParameterFromUsageFix(
             else null
             val upperBound = upperBoundText?.let { psiFactory.createType(it) }
             val newTypeParameterText = if (upperBound != null) "${data.name} : ${upperBound.text}" else data.name
-            elementsToShorten += declaration.addTypeParameter(psiFactory.createTypeParameter(newTypeParameterText))!!
+            val newTypeParameter = declaration.addTypeParameter(psiFactory.createTypeParameter(newTypeParameterText))!!
+            elementsToShorten += newTypeParameter
 
             val anonymizedTypeParameter = createFakeTypeParameterDescriptor(data.fakeTypeParameter.containingDeclaration, "_")
             val anonymizedUpperBoundText = upperBoundType?.let {
@@ -132,6 +138,8 @@ class CreateTypeParameterFromUsageFix(
             }
 
             ShortenReferences.DEFAULT.process(elementsToShorten)
+
+            newTypeParameter
         }
     }
 }

idea/src/org/jetbrains/kotlin/idea/refactoring/KotlinRefactoringBundle.properties

@@ -25,7 +25,7 @@ cannot.refactor.synthesized.function=Cannot refactor synthesized function ''{0}'
 error.types.in.generated.function=Cannot generate function with erroneous return type
 cannot.introduce.parameter.of.0.type=Cannot introduce parameter of type ''{0}''
 
-0.has.detected.1.code.fragments.in.this.file.that.can.be.replaced.with.a.call.to.extracted.declaration={0} has detected {1} code {1,choice,1#fragment|2#fragments} in this file that can be replaced with a call to extracted declaration. Would you like to review and replace {1,choice,1#it|2#them}?
+0.has.detected.1.code.fragments.in.this.file.that.can.be.replaced.with.a.call.to.extracted.declaration={0} has detected {1} code {1,choice,1#fragment|2#fragments} in this file that can be replaced with a usage of extracted declaration. Would you like to review and replace {1,choice,1#it|2#them}?
 
 error.wrong.caret.position.function.or.constructor.name=The caret should be positioned at the name of the function or constructor to be refactored.
 error.cant.refactor.vararg.functions=Can't refactor the function with variable arguments

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceParameter/KotlinIntroduceParameterHandler.kt

@@ -176,8 +176,6 @@ fun IntroduceParameterDescriptor.performRefactoring() {
     }
 }
 
-private fun isObjectOrNonInnerClass(e: PsiElement): Boolean = e is KtObjectDeclaration || (e is KtClass && !e.isInner())
-
 fun selectNewParameterContext(
         editor: Editor,
         file: KtFile,

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceTypeParameter/KotlinIntroduceTypeParameterHandler.kt

@@ -0,0 +1,144 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeParameter
+
+import com.intellij.lang.refactoring.RefactoringSupportProvider
+import com.intellij.openapi.actionSystem.CommonDataKeys
+import com.intellij.openapi.actionSystem.DataContext
+import com.intellij.openapi.actionSystem.impl.SimpleDataContext
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.editor.ex.EditorEx
+import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiFile
+import com.intellij.refactoring.RefactoringActionHandler
+import com.intellij.refactoring.rename.inplace.VariableInplaceRenameHandler
+import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
+import org.jetbrains.kotlin.idea.core.KotlinNameSuggester
+import org.jetbrains.kotlin.idea.quickfix.createFromUsage.createTypeParameter.CreateTypeParameterByRefActionFactory
+import org.jetbrains.kotlin.idea.quickfix.createFromUsage.createTypeParameter.CreateTypeParameterFromUsageFix
+import org.jetbrains.kotlin.idea.quickfix.createFromUsage.createTypeParameter.getPossibleTypeParameterContainers
+import org.jetbrains.kotlin.idea.refactoring.introduce.AbstractIntroduceAction
+import org.jetbrains.kotlin.idea.refactoring.introduce.extractionEngine.processDuplicates
+import org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeAlias.KotlinIntroduceTypeAliasHandler
+import org.jetbrains.kotlin.idea.refactoring.introduce.selectElementsWithTargetParent
+import org.jetbrains.kotlin.idea.refactoring.introduce.showErrorHint
+import org.jetbrains.kotlin.idea.util.application.executeCommand
+import org.jetbrains.kotlin.idea.util.application.runWriteAction
+import org.jetbrains.kotlin.idea.util.getResolutionScope
+import org.jetbrains.kotlin.idea.util.psi.patternMatching.KotlinPsiUnifier
+import org.jetbrains.kotlin.idea.util.psi.patternMatching.toRange
+import org.jetbrains.kotlin.incremental.components.NoLookupLocation
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi.KtPsiFactory
+import org.jetbrains.kotlin.psi.KtTypeElement
+import org.jetbrains.kotlin.psi.KtTypeParameterListOwner
+import org.jetbrains.kotlin.resolve.bindingContextUtil.getAbbreviatedTypeOrType
+import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
+import org.jetbrains.kotlin.resolve.scopes.utils.findClassifier
+import org.jetbrains.kotlin.utils.keysToMap
+import java.lang.AssertionError
+
+object KotlinIntroduceTypeParameterHandler : RefactoringActionHandler {
+    @JvmField
+    val REFACTORING_NAME = "Introduce Type Parameter"
+
+    fun selectElements(editor: Editor, file: KtFile, continuation: (elements: List<PsiElement>, targetParent: PsiElement) -> Unit) {
+        selectElementsWithTargetParent(
+                REFACTORING_NAME,
+                editor,
+                file,
+                "Introduce type parameter to declaration",
+                listOf(CodeInsightUtils.ElementKind.TYPE_ELEMENT),
+                { elements, parent -> getPossibleTypeParameterContainers(parent) },
+                continuation
+        )
+    }
+
+    fun doInvoke(project: Project, editor: Editor, elements: List<PsiElement>, targetParent: PsiElement) {
+        val targetOwner = targetParent as KtTypeParameterListOwner
+        val typeElementToExtract = elements.singleOrNull() as? KtTypeElement
+                            ?: return showErrorHint(project, editor, "No type to refactor", REFACTORING_NAME)
+
+        val scope = targetOwner.getResolutionScope()
+        val suggestedNames = KotlinNameSuggester.suggestNamesForTypeParameters(1) {
+            scope.findClassifier(Name.identifier(it), NoLookupLocation.FROM_IDE) == null
+        }
+        val defaultName = suggestedNames.single()
+
+        val context = typeElementToExtract.analyze(BodyResolveMode.PARTIAL)
+        val originalType = typeElementToExtract.getAbbreviatedTypeOrType(context)
+
+        val createTypeParameterData =
+                CreateTypeParameterByRefActionFactory.extractFixData(typeElementToExtract, defaultName)
+                        ?.copy(upperBoundType = originalType, declaration = targetOwner)
+                ?: return showErrorHint(project, editor, "Refactoring is not applicable in the current context", REFACTORING_NAME)
+
+        val parameterRefElement = KtPsiFactory(project).createType(defaultName).typeElement!!
+
+        val duplicateRanges = typeElementToExtract
+                .toRange()
+                .match(targetParent, KotlinPsiUnifier.DEFAULT)
+                .filterNot {
+                    val textRange = it.range.getTextRange()
+                    typeElementToExtract.textRange.intersects(textRange) || targetOwner.typeParameterList?.textRange?.intersects(textRange) ?: false
+                }
+                .mapNotNull { it.range.elements.toRange() }
+
+        project.executeCommand(REFACTORING_NAME) {
+            runWriteAction {
+                typeElementToExtract.replace(parameterRefElement)
+
+                processDuplicates(
+                        duplicateRanges.keysToMap {
+                            {
+                                it.elements.singleOrNull()?.replace(parameterRefElement)
+                                Unit
+                            }
+                        },
+                        project,
+                        editor
+                )
+            }
+
+            val newTypeParameter = CreateTypeParameterFromUsageFix(typeElementToExtract, createTypeParameterData).doInvoke()
+                                   ?: return@executeCommand
+
+            if (!ApplicationManager.getApplication().isUnitTestMode) {
+                val dataContext = SimpleDataContext.getSimpleContext(CommonDataKeys.PSI_ELEMENT.name, newTypeParameter,
+                                                                     (editor as? EditorEx)?.dataContext)
+                VariableInplaceRenameHandler().doRename(newTypeParameter, editor, dataContext)
+            }
+        }
+    }
+
+    override fun invoke(project: Project, editor: Editor, file: PsiFile, dataContext: DataContext?) {
+        if (file !is KtFile) return
+        selectElements(editor, file) { elements, targetParent -> doInvoke(project, editor, elements, targetParent) }
+    }
+
+    override fun invoke(project: Project, elements: Array<out PsiElement>, dataContext: DataContext?) {
+        throw AssertionError("${KotlinIntroduceTypeAliasHandler.REFACTORING_NAME} can only be invoked from editor")
+    }
+}
+
+class IntroduceTypeParameterAction : AbstractIntroduceAction() {
+    override fun getRefactoringHandler(provider: RefactoringSupportProvider) = KotlinIntroduceTypeParameterHandler
+}

idea/testData/refactoring/introduceTypeParameter/duplicates.kt

@@ -0,0 +1,9 @@
+class A
+
+fun foo(x: List<A>, f: (<selection>A</selection>) -> Int) {
+    val a: A? = x.firstOrNull()
+}
+
+fun test() {
+    foo(listOf(A())) { 1 }
+}

idea/testData/refactoring/introduceTypeParameter/duplicates.kt.after

@@ -0,0 +1,9 @@
+class A
+
+fun <T : A> foo(x: List<T>, f: (T) -> Int) {
+    val a: T? = x.firstOrNull()
+}
+
+fun test() {
+    foo(listOf(A())) { 1 }
+}

idea/testData/refactoring/introduceTypeParameter/functionType.kt

@@ -0,0 +1,9 @@
+class A
+
+fun foo(x: List<<selection>(A?) -> List<Int></selection>>) {
+
+}
+
+fun test() {
+    foo(listOf({ a -> listOf(1) }))
+}

idea/testData/refactoring/introduceTypeParameter/functionType.kt.after

@@ -0,0 +1,9 @@
+class A
+
+fun <T : (A?) -> List<Int>> foo(x: List<T>) {
+
+}
+
+fun test() {
+    foo(listOf({ a -> listOf(1) }))
+}

idea/testData/refactoring/introduceTypeParameter/inClass.kt

@@ -0,0 +1,11 @@
+class A
+
+open class X(x: List<A>, f: (<selection>A</selection>) -> Int) {
+    val a: A? = x.firstOrNull()
+}
+
+class Y : X(listOf(A()), { 1 })
+
+fun test() {
+    X(listOf(A())) { 1 }
+}

idea/testData/refactoring/introduceTypeParameter/inClass.kt.after

@@ -0,0 +1,11 @@
+class A
+
+open class X<T : A>(x: List<T>, f: (T) -> Int) {
+    val a: T? = x.firstOrNull()
+}
+
+class Y : X<A>(listOf(A()), { 1 })
+
+fun test() {
+    X(listOf(A())) { 1 }
+}

idea/testData/refactoring/introduceTypeParameter/inProperty.kt

@@ -0,0 +1,11 @@
+class A
+
+val List<<selection>A</selection>>.foo: (A) -> Int
+    get() {
+        val a: A? = firstOrNull()
+        return { 0 }
+    }
+
+fun test() {
+    val t = listOf(A()).foo
+}

idea/testData/refactoring/introduceTypeParameter/inProperty.kt.after

@@ -0,0 +1,11 @@
+class A
+
+val <T : A> List<T>.foo: (T) -> Int
+    get() {
+        val a: T? = firstOrNull()
+        return { 0 }
+    }
+
+fun test() {
+    val t = listOf(A()).foo
+}

idea/testData/refactoring/introduceTypeParameter/nullableType.kt

@@ -0,0 +1,9 @@
+class A
+
+fun foo(x: List<<selection>A?</selection>>) {
+
+}
+
+fun test() {
+    foo(listOf(A()))
+}

idea/testData/refactoring/introduceTypeParameter/nullableType.kt.after

@@ -0,0 +1,9 @@
+class A
+
+fun <T : A?> foo(x: List<T>) {
+
+}
+
+fun test() {
+    foo(listOf(A()))
+}

idea/testData/refactoring/introduceTypeParameter/userType.kt

@@ -0,0 +1,9 @@
+class A
+
+fun foo(x: (<selection>List<A?></selection>) -> Int) {
+
+}
+
+fun test() {
+    foo { 1 }
+}

idea/testData/refactoring/introduceTypeParameter/userType.kt.after

@@ -0,0 +1,9 @@
+class A
+
+fun <T : List<A?>> foo(x: (T) -> Int) {
+
+}
+
+fun test() {
+    foo<List<A?>> { 1 }
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/introduce/AbstractExtractionTest.kt

@@ -45,6 +45,7 @@ import org.jetbrains.kotlin.idea.refactoring.introduce.introduceParameter.*
 import org.jetbrains.kotlin.idea.refactoring.introduce.introduceProperty.INTRODUCE_PROPERTY
 import org.jetbrains.kotlin.idea.refactoring.introduce.introduceProperty.KotlinIntroducePropertyHandler
 import org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeAlias.KotlinIntroduceTypeAliasHandler
+import org.jetbrains.kotlin.idea.refactoring.introduce.introduceTypeParameter.KotlinIntroduceTypeParameterHandler
 import org.jetbrains.kotlin.idea.refactoring.introduce.introduceVariable.KotlinIntroduceVariableHandler
 import org.jetbrains.kotlin.idea.test.ConfigLibraryUtil
 import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
@@ -314,6 +315,18 @@ abstract class AbstractExtractionTest() : KotlinLightCodeInsightFixtureTestCase(
         }
     }
 
+    protected fun doIntroduceTypeParameterTest(path: String) {
+        doTest(path) { file ->
+            file as KtFile
+
+            val explicitPreviousSibling = file.findElementByCommentPrefix("// SIBLING:")
+            val editor = fixture.editor
+            KotlinIntroduceTypeParameterHandler.selectElements(editor, file) { elements, previousSibling ->
+                KotlinIntroduceTypeParameterHandler.doInvoke(project, editor, elements, explicitPreviousSibling ?: previousSibling)
+            }
+        }
+    }
+
     protected fun doIntroduceTypeAliasTest(path: String) {
         doTest(path) { file ->
             file as KtFile

idea/tests/org/jetbrains/kotlin/idea/refactoring/introduce/ExtractionTestGenerated.java

@@ -3992,6 +3992,51 @@ public class ExtractionTestGenerated extends AbstractExtractionTest {
         }
     }
 
+    @TestMetadata("idea/testData/refactoring/introduceTypeParameter")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class IntroduceTypeParameter extends AbstractExtractionTest {
+        public void testAllFilesPresentInIntroduceTypeParameter() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/refactoring/introduceTypeParameter"), Pattern.compile("^(.+)\\.(kt|kts)$"), true);
+        }
+
+        @TestMetadata("duplicates.kt")
+        public void testDuplicates() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceTypeParameter/duplicates.kt");
+            doIntroduceTypeParameterTest(fileName);
+        }
+
+        @TestMetadata("functionType.kt")
+        public void testFunctionType() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceTypeParameter/functionType.kt");
+            doIntroduceTypeParameterTest(fileName);
+        }
+
+        @TestMetadata("inClass.kt")
+        public void testInClass() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceTypeParameter/inClass.kt");
+            doIntroduceTypeParameterTest(fileName);
+        }
+
+        @TestMetadata("inProperty.kt")
+        public void testInProperty() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceTypeParameter/inProperty.kt");
+            doIntroduceTypeParameterTest(fileName);
+        }
+
+        @TestMetadata("nullableType.kt")
+        public void testNullableType() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceTypeParameter/nullableType.kt");
+            doIntroduceTypeParameterTest(fileName);
+        }
+
+        @TestMetadata("userType.kt")
+        public void testUserType() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/introduceTypeParameter/userType.kt");
+            doIntroduceTypeParameterTest(fileName);
+        }
+    }
+
     @TestMetadata("idea/testData/refactoring/introduceTypeAlias")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)