From c890dc6edbea7dc5e85df0c3d1dae37e78117486 Mon Sep 17 00:00:00 2001
From: Patrik Oldsberg <poldsberg@gmail.com>
Date: Thu, 25 Sep 2025 11:58:22 +0200
Subject: [PATCH] bui-themer: remove unnecessary matchMedia mocks

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
---
 .../BuiThemerPage/BuiThemePreview.test.tsx       | 15 ---------------
 .../BuiThemerPage/BuiThemerPage.test.tsx         | 15 ---------------
 .../BuiThemerPage/ThemeContent.test.tsx          | 16 ----------------
 3 files changed, 46 deletions(-)

diff --git a/plugins/bui-themer/src/components/BuiThemerPage/BuiThemePreview.test.tsx b/plugins/bui-themer/src/components/BuiThemerPage/BuiThemePreview.test.tsx
index 79a2f9e83e..375f9411a7 100644
--- a/plugins/bui-themer/src/components/BuiThemerPage/BuiThemePreview.test.tsx
+++ b/plugins/bui-themer/src/components/BuiThemerPage/BuiThemePreview.test.tsx
@@ -20,21 +20,6 @@ import { renderInTestApp } from '@backstage/test-utils';
 import { BuiThemePreview } from './BuiThemePreview';
 
 describe('BuiThemePreview', () => {
-  beforeAll(() => {
-    Object.defineProperty(window, 'matchMedia', {
-      writable: true,
-      value: jest.fn().mockImplementation(query => ({
-        matches: false,
-        media: query,
-        onchange: null,
-        addListener: jest.fn(),
-        removeListener: jest.fn(),
-        addEventListener: jest.fn(),
-        removeEventListener: jest.fn(),
-        dispatchEvent: jest.fn(),
-      })),
-    });
-  });
   it('renders headings and sample components', async () => {
     const { container } = await renderInTestApp(
       <BuiThemePreview
diff --git a/plugins/bui-themer/src/components/BuiThemerPage/BuiThemerPage.test.tsx b/plugins/bui-themer/src/components/BuiThemerPage/BuiThemerPage.test.tsx
index 49fe6f2a9a..ad6d750c9e 100644
--- a/plugins/bui-themer/src/components/BuiThemerPage/BuiThemerPage.test.tsx
+++ b/plugins/bui-themer/src/components/BuiThemerPage/BuiThemerPage.test.tsx
@@ -33,21 +33,6 @@ function makeAppTheme(id: string, title: string, variant: 'light' | 'dark') {
 }
 
 describe('BuiThemerPage', () => {
-  beforeAll(() => {
-    Object.defineProperty(window, 'matchMedia', {
-      writable: true,
-      value: jest.fn().mockImplementation(query => ({
-        matches: false,
-        media: query,
-        onchange: null,
-        addListener: jest.fn(),
-        removeListener: jest.fn(),
-        addEventListener: jest.fn(),
-        removeEventListener: jest.fn(),
-        dispatchEvent: jest.fn(),
-      })),
-    });
-  });
   it('renders empty state when no themes installed', async () => {
     const apis = [[appThemeApiRef, { getInstalledThemes: () => [] }]] as const;
     await renderInTestApp(
diff --git a/plugins/bui-themer/src/components/BuiThemerPage/ThemeContent.test.tsx b/plugins/bui-themer/src/components/BuiThemerPage/ThemeContent.test.tsx
index 8ece77ad0e..3a075b80d3 100644
--- a/plugins/bui-themer/src/components/BuiThemerPage/ThemeContent.test.tsx
+++ b/plugins/bui-themer/src/components/BuiThemerPage/ThemeContent.test.tsx
@@ -30,22 +30,6 @@ jest.mock('./convertMuiToBuiTheme', () => ({
 describe('ThemeContent', () => {
   const muiTheme = createTheme();
 
-  beforeAll(() => {
-    Object.defineProperty(window, 'matchMedia', {
-      writable: true,
-      value: jest.fn().mockImplementation(query => ({
-        matches: false,
-        media: query,
-        onchange: null,
-        addListener: jest.fn(),
-        removeListener: jest.fn(),
-        addEventListener: jest.fn(),
-        removeEventListener: jest.fn(),
-        dispatchEvent: jest.fn(),
-      })),
-    });
-  });
-
   it('renders title, variant and tabs', async () => {
     await renderInTestApp(
       <ThemeContent