Rename: Do not report redeclaration conflict for private top-level declarations located in different files

#KT-14361 Fixed

ChangeLog.md

@@ -340,6 +340,7 @@ These artifacts include extensions for the types available in the latter JDKs, s
 - [`KT-14583`](https://youtrack.jetbrains.com/issue/KT-14583) Change Signature: Use new signature when looking for redeclaration conflicts
 - [`KT-14854`](https://youtrack.jetbrains.com/issue/KT-14854) Extract Interface: Fix NPE on dialog opening
 - [`KT-14814`](https://youtrack.jetbrains.com/issue/KT-14814) Rename: Fix renaming of .kts file to .kt and vice versa
+- [`KT-14361`](https://youtrack.jetbrains.com/issue/KT-14361) Rename: Do not report redeclaration conflict for private top-level declarations located in different files
 
 ## 1.0.5
 

idea/src/org/jetbrains/kotlin/idea/refactoring/rename/renameConflictUtils.kt

@@ -86,14 +86,24 @@ internal fun checkRedeclarations(
         newName: String,
         result: MutableList<UsageInfo>
 ) {
-    fun MemberScope.findSiblingByName(): DeclarationDescriptor? {
+    fun DeclarationDescriptor.isTopLevelPrivate(): Boolean {
+        return this is DeclarationDescriptorWithVisibility
+               && visibility == Visibilities.PRIVATE
+               && containingDeclaration is PackageFragmentDescriptor
+    }
+
+    fun isInSameFile(d1: DeclarationDescriptor, d2: DeclarationDescriptor): Boolean {
+        return (d1 as? DeclarationDescriptorWithSource)?.source?.getPsi()?.containingFile == (d2 as? DeclarationDescriptorWithSource)?.source?.getPsi()?.containingFile
+    }
+
+    fun MemberScope.findSiblingsByName(): List<DeclarationDescriptor> {
         val descriptorKindFilter = when (descriptor) {
             is ClassDescriptor -> DescriptorKindFilter.CLASSIFIERS
             is PropertyDescriptor -> DescriptorKindFilter.VARIABLES
             is FunctionDescriptor -> DescriptorKindFilter.FUNCTIONS
-            else -> return null
+            else -> return emptyList()
         }
-        return getDescriptorsFiltered(descriptorKindFilter) { it.asString() == newName }.firstOrNull { it != descriptor }
+        return getDescriptorsFiltered(descriptorKindFilter) { it.asString() == newName }.filter { it != descriptor }
     }
 
     fun getSiblingWithNewName(): DeclarationDescriptor? {
@@ -120,8 +130,11 @@ internal fun checkRedeclarations(
         }
 
         return when (containingDescriptor) {
-            is ClassDescriptor -> containingDescriptor.unsubstitutedMemberScope.findSiblingByName()
+            is ClassDescriptor -> containingDescriptor.unsubstitutedMemberScope.findSiblingsByName().firstOrNull()
-            is PackageFragmentDescriptor -> containingDescriptor.getMemberScope().findSiblingByName()
+            is PackageFragmentDescriptor -> containingDescriptor.getMemberScope().findSiblingsByName().firstOrNull {
+                it != descriptor
+                && (!(descriptor.isTopLevelPrivate() || it.isTopLevelPrivate()) || isInSameFile(descriptor, it))
+            }
             else -> {
                 val block = (descriptor as? DeclarationDescriptorWithSource)?.source?.getPsi()?.parent as? KtBlockExpression
                             ?: return null

idea/testData/refactoring/rename/nonPrivateTopLevelDeclarationsConflict/before/test1.kt

@@ -0,0 +1,3 @@
+package p
+
+val /*rename*/foo = 1

idea/testData/refactoring/rename/nonPrivateTopLevelDeclarationsConflict/before/test2.kt

@@ -0,0 +1,3 @@
+package p
+
+val bar = 2

idea/testData/refactoring/rename/nonPrivateTopLevelDeclarationsConflict/nonPrivateTopLevelDeclarationsNoConflict.test

@@ -0,0 +1,6 @@
+{
+  "type": "MARKED_ELEMENT",
+  "mainFile": "test1.kt",
+  "newName": "bar",
+  "hint": "Property 'bar' is already declared in package 'p'"
+}

idea/testData/refactoring/rename/privateAndNonPrivateTopLevelDeclarationsNoConflict/after/test1.kt

@@ -0,0 +1,3 @@
+package p
+
+val bar = 1

idea/testData/refactoring/rename/privateAndNonPrivateTopLevelDeclarationsNoConflict/after/test2.kt

@@ -0,0 +1,3 @@
+package p
+
+private val bar = 2

idea/testData/refactoring/rename/privateAndNonPrivateTopLevelDeclarationsNoConflict/before/test1.kt

@@ -0,0 +1,3 @@
+package p
+
+val /*rename*/foo = 1

idea/testData/refactoring/rename/privateAndNonPrivateTopLevelDeclarationsNoConflict/before/test2.kt

@@ -0,0 +1,3 @@
+package p
+
+private val bar = 2

idea/testData/refactoring/rename/privateAndNonPrivateTopLevelDeclarationsNoConflict/privateAndNonPrivateTopLevelDeclarationsNoConflict.test

@@ -0,0 +1,5 @@
+{
+  "type": "MARKED_ELEMENT",
+  "mainFile": "test1.kt",
+  "newName": "bar"
+}

idea/testData/refactoring/rename/privateTopLevelDeclarationsNoConflict/after/test1.kt

@@ -0,0 +1,3 @@
+package p
+
+private val bar = 1

idea/testData/refactoring/rename/privateTopLevelDeclarationsNoConflict/after/test2.kt

@@ -0,0 +1,3 @@
+package p
+
+private val bar = 2

idea/testData/refactoring/rename/privateTopLevelDeclarationsNoConflict/before/test1.kt

@@ -0,0 +1,3 @@
+package p
+
+private val /*rename*/foo = 1

idea/testData/refactoring/rename/privateTopLevelDeclarationsNoConflict/before/test2.kt

@@ -0,0 +1,3 @@
+package p
+
+private val bar = 2

idea/testData/refactoring/rename/privateTopLevelDeclarationsNoConflict/privateTopLevelDeclarationsNoConflict.test

@@ -0,0 +1,5 @@
+{
+  "type": "MARKED_ELEMENT",
+  "mainFile": "test1.kt",
+  "newName": "bar"
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/rename/RenameTestGenerated.java

@@ -246,6 +246,12 @@ public class RenameTestGenerated extends AbstractRenameTest {
         doTest(fileName);
     }
 
+    @TestMetadata("nonPrivateTopLevelDeclarationsConflict/nonPrivateTopLevelDeclarationsNoConflict.test")
+    public void testNonPrivateTopLevelDeclarationsConflict_NonPrivateTopLevelDeclarationsNoConflict() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/rename/nonPrivateTopLevelDeclarationsConflict/nonPrivateTopLevelDeclarationsNoConflict.test");
+        doTest(fileName);
+    }
+
     @TestMetadata("noShadowingConflictForSiblingDeclarations/noShadowingConflictForSiblingDeclarations.test")
     public void testNoShadowingConflictForSiblingDeclarations_NoShadowingConflictForSiblingDeclarations() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/rename/noShadowingConflictForSiblingDeclarations/noShadowingConflictForSiblingDeclarations.test");
@@ -294,6 +300,18 @@ public class RenameTestGenerated extends AbstractRenameTest {
         doTest(fileName);
     }
 
+    @TestMetadata("privateAndNonPrivateTopLevelDeclarationsNoConflict/privateAndNonPrivateTopLevelDeclarationsNoConflict.test")
+    public void testPrivateAndNonPrivateTopLevelDeclarationsNoConflict_PrivateAndNonPrivateTopLevelDeclarationsNoConflict() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/rename/privateAndNonPrivateTopLevelDeclarationsNoConflict/privateAndNonPrivateTopLevelDeclarationsNoConflict.test");
+        doTest(fileName);
+    }
+
+    @TestMetadata("privateTopLevelDeclarationsNoConflict/privateTopLevelDeclarationsNoConflict.test")
+    public void testPrivateTopLevelDeclarationsNoConflict_PrivateTopLevelDeclarationsNoConflict() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/rename/privateTopLevelDeclarationsNoConflict/privateTopLevelDeclarationsNoConflict.test");
+        doTest(fileName);
+    }
+
     @TestMetadata("propertyAccidentalOverrideSubclass/propertyAccidentalOverrideSubclass.test")
     public void testPropertyAccidentalOverrideSubclass_PropertyAccidentalOverrideSubclass() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/refactoring/rename/propertyAccidentalOverrideSubclass/propertyAccidentalOverrideSubclass.test");