test: fix flaky did-change-theme-color test (#27739)

* test: move did-change-theme-color test to main

* test: enable did-change-theme-color test for WOA

spec-main/api-web-contents-spec.ts

@@ -1383,8 +1383,7 @@ describe('webContents module', () => {
     }
   });
 
-  // TODO (jkleinsc) - reenable this test on WOA once https://github.com/electron/electron/issues/26045 is resolved
-  ifdescribe(process.platform !== 'win32' || process.arch !== 'arm64')('did-change-theme-color event', () => {
+  describe('did-change-theme-color event', () => {
     afterEach(closeAllWindows);
     it('is triggered with correct theme color', (done) => {
       const w = new BrowserWindow({ show: true });

spec-main/webview-spec.ts

@@ -1,4 +1,5 @@
 import * as path from 'path';
+import * as url from 'url';
 import { BrowserWindow, session, ipcMain, app, WebContents } from 'electron/main';
 import { closeAllWindows } from './window-helpers';
 import { emittedOnce, emittedUntil } from './events-helpers';
@@ -181,6 +182,31 @@ describe('<webview> tag', function () {
     });
   });
 
+  describe('did-change-theme-color event', () => {
+    it('emits when theme color changes', async () => {
+      const w = new BrowserWindow({
+        webPreferences: {
+          webviewTag: true
+        }
+      });
+      await w.loadURL('about:blank');
+      const src = url.format({
+        pathname: `${fixtures.replace(/\\/g, '/')}/pages/theme-color.html`,
+        protocol: 'file',
+        slashes: true
+      });
+      const message = await w.webContents.executeJavaScript(`new Promise((resolve, reject) => {
+        const webview = new WebView()
+        webview.setAttribute('src', '${src}')
+        webview.addEventListener('did-change-theme-color', (e) => {
+          resolve('ok')
+        })
+        document.body.appendChild(webview)
+      })`);
+      expect(message).to.equal('ok');
+    });
+  });
+
   it('loads devtools extensions registered on the parent window', async () => {
     const w = new BrowserWindow({
       show: false,

spec/webview-spec.js

@@ -992,16 +992,6 @@ describe('<webview> tag', function () {
     });
   });
 
-  // TODO (jkleinsc) - reenable this test on WOA once https://github.com/electron/electron/issues/26045 is resolved
-  ifdescribe(process.platform !== 'win32' || process.arch !== 'arm64')('did-change-theme-color event', () => {
-    it('emits when theme color changes', async () => {
-      loadWebView(webview, {
-        src: `file://${fixtures}/pages/theme-color.html`
-      });
-      await waitForEvent(webview, 'did-change-theme-color');
-    });
-  });
-
   describe('<webview>.getWebContentsId', () => {
     it('can return the WebContents ID', async () => {
       const src = 'about:blank';