Don't change name of interface/class

src/generate-output.ts

@@ -231,6 +231,13 @@ function getStatementText(statement: ts.Statement, includeSortingValue: boolean,
 							return node;
 						}
 
+						if (ts.isIdentifier(node) && (node.parent as ts.NamedDeclaration).name === node && (
+							ts.isInterfaceDeclaration(node.parent) ||
+							ts.isClassDeclaration(node.parent)
+						)) {
+							return node;
+						}
+
 						return recreateEntityName(node, helpers);
 					}
 				}

tests/e2e/test-cases/names-collision-with-globals/config.ts

@@ -1,6 +1,9 @@
 import { TestCaseConfig } from '../test-case-config';
 
 const config: TestCaseConfig = {
+    output: {
+        inlineDeclareExternals: true
+    }
 };
 
 export = config;

tests/e2e/test-cases/names-collision-with-globals/input.ts

@@ -1,4 +1,5 @@
 import { Date as LocalDate, Promise as LocalPromise } from './local-types';
+import { BaseEncodingOptions as Alias1, BigIntOptions as Alias2 } from 'node:fs';
 
 export interface Int {
 	localD: LocalDate;
@@ -7,3 +8,16 @@ export interface Int {
 	localP: LocalPromise;
 	globalP: Promise<number>;
 }
+
+export interface Interface1 extends Alias1 {}
+export interface Interface2 extends Alias2 {}
+
+declare module 'node:fs' {
+    interface BaseEncodingOptions {
+        newField: string;
+    }
+
+	class BigIntOptions {
+		newField: string;
+	}
+}

tests/e2e/test-cases/names-collision-with-globals/output.d.ts

@@ -1,3 +1,5 @@
+import { BaseEncodingOptions as Alias1, BigIntOptions as Alias2 } from 'node:fs';
+
 interface Promise$3 {
 }
 interface Date$2 {
@@ -8,5 +10,17 @@ export interface Int {
 	localP: Promise$3;
 	globalP: Promise<number>;
 }
+export interface Interface1 extends Alias1 {
+}
+export interface Interface2 extends Alias2 {
+}
+declare module "node:fs" {
+	interface BaseEncodingOptions {
+		newField: string;
+	}
+	class BigIntOptions {
+		newField: string;
+	}
+}
 
 export {};

tests/e2e/test-cases/names-collision-with-globals/tsconfig.json

@@ -0,0 +1,6 @@
+{
+	"extends": "../tsconfig.json",
+	"compilerOptions": {
+		"types": ["node"]
+	}
+}