Integration Tests, Prevent duplicated mixin fields

Author: alphanull

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
-node_modules
+node_modules
+test/output

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.3.0] - 2025-11-09
+
+### Added
+
+- Added integration tests that can be invoked by `npm run test`
+- New Fix: Prevent duplicated mixin fields on classes with constructors. Resolves [JSDoc Issue #2092](https://github.com/jsdoc/jsdoc/issues/2092)
+
 ## [1.2.1] - 2025-09-21
 
 ### Fixed

README.md

@@ -17,6 +17,7 @@ Modern JavaScript syntax isn’t always accurately recognized by JSDoc. This plu
 * Fixes various ES6 default export issues - corrects wrong names and structures for exported classes, functions, object literals, and their members.
 * Static class properties are correctly parsed with static scope instead of instance scope.
 * ES6 class mixin static members retain their static scope during augmentation.
+* Prevents duplicated mixin fields when classes declare constructors.
 * Works seamlessly with JSDoc's default parser.
 * Works with all themes (but see note below!).
 * Perfectly integrates with [VisionTheme](https://github.com/alphanull/jsdoc-vision-theme) for a modern UI (optional).
@@ -165,6 +166,16 @@ class TestClass extends TestMixin {
 * `TestClass.staticMethod` retains static scope during mixin augmentation (fixes JSDoc Bug #2146).
 * `TestClass.classStaticProp` is correctly parsed as static scope.
 
+## Tests
+
+Run the integration suite to ensure all plugin features keep working:
+
+```bash
+npm test
+```
+
+Snapshots land in the destination chosen in `test/jsdoc.config.json` (default `test/output/`) for manual inspection.
+
 ## Limitations
 
 While there are no limitations with this plugin per se, for private members (which start with "#")  there can be resulting hash links containing two hashes, like: `<a href="##privateMember">#privateMember</a>` which can lead to broken links. Unfortunately, this cannot be handled by the plugin itself and needs to be managed by the theme.
@@ -175,4 +186,4 @@ The good news is that documenting modern code typically requires a modern theme
 
 [MIT License](https://opensource.org/license/MIT)
 
-Copyright © 2025–present Frank Kudermann @ [alphanull.de](https://alphanull.de)
+Copyright © 2025–present Frank Kudermann @ [alphanull.de](https://alphanull.de)

index.js

@@ -5,9 +5,10 @@
  * - Bound arrow functions (#method = () => {})
  * - Static class properties (fixes JSDoc bug #2144)
  * - ES6 class mixin static members (fixes JSDoc bug #2146)
+ * - Prevent duplicated mixin fields on classes with constructors. (fixes JSDoc bug #2092)
  * It injects missing @function and @private tags where necessary and formats the resulting doclets consistently.
  * @author  Frank Kudermann @ alphanull
- * @version 1.2.1
+ * @version 1.3.0
  * @license MIT
  */
 const handlers = {
@@ -98,6 +99,11 @@ const handlers = {
         // Phase 2: Apply corrections for all relevant doclets
         for (const doclet of doclets) {
 
+            // Prevent duplicate mixin augmentation for synthetic/undocumented class doclets (#2092)
+            if (Array.isArray(doclet.mixes) && doclet.mixes.length > 0 && doclet.undocumented) {
+                doclet.mixes = [];
+            }
+
             // Handle value-carrying assignment doclets related to private properties
             if (doclet.kind === 'member'
               && doclet.scope === 'inner'