rra/ilgonmic/duplicated-import-names

[JS IR] Add tests with external funs and global vals

[JS IR] Non module cases are exceptions for naming

[JS IR] Use fqn for jsModule on declaration

[JS IR] Add test on same external names

Merge-request: KT-MR-5901
Merged-by: Ilya Goncharov <Ilya.Goncharov@jetbrains.com>

^KT-51438 fixed

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/transformers/irToJs/JsNameLinkingNamer.kt

@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.ir.backend.js.utils.*
 import org.jetbrains.kotlin.ir.declarations.*
 import org.jetbrains.kotlin.ir.symbols.IrClassSymbol
 import org.jetbrains.kotlin.ir.types.IrSimpleType
+import org.jetbrains.kotlin.ir.util.fqNameWhenAvailable
 import org.jetbrains.kotlin.ir.util.isEffectivelyExternal
 import org.jetbrains.kotlin.ir.util.parentAsClass
 import org.jetbrains.kotlin.js.backend.ast.*
@@ -40,7 +41,13 @@ class JsNameLinkingNamer(private val context: JsIrBackendContext) : IrNamerBase(
 
             when {
                 jsModule != null -> {
-                    val name = JsName(declaration.getJsNameOrKotlinName().asString(), false)
+                    val nameString = if (declaration.isJsNonModule()) {
+                        declaration.getJsNameOrKotlinName().asString()
+                    } else {
+                        val parent = declaration.fqNameWhenAvailable!!.parent()
+                        parent.child(declaration.getJsNameOrKotlinName()).asString()
+                    }
+                    val name = JsName(sanitizeName(nameString), false)
                     importedModules += JsImportedModule(jsModule, name, name.makeRef())
                     return name
                 }