Ensure addons are loaded in standalone tests

addons/addon-canvas/test/CanvasRenderer.test.ts

@@ -28,5 +28,10 @@ test.describe('Canvas Renderer Integration Tests', () => {
   test.skip(({ browserName }) => browserName === 'webkit');
 
   injectSharedRendererTests(ctxWrapper);
-  injectSharedRendererTestsStandalone(ctxWrapper);
+  injectSharedRendererTestsStandalone(ctxWrapper, async () => {
+    await ctx.page.evaluate(`
+      window.addon = new window.CanvasAddon(true);
+      window.term.loadAddon(window.addon);
+    `);
+  });
 });

test/playwright/Renderer.test.ts

@@ -21,5 +21,5 @@ test.afterAll(async () => await ctx.page.close());
 
 test.describe('DOM Renderer Integration Tests', () => {
   injectSharedRendererTests(ctxWrapper);
-  injectSharedRendererTestsStandalone(ctxWrapper);
+  injectSharedRendererTestsStandalone(ctxWrapper, () => {});
 });

test/playwright/SharedRendererTests.ts

@@ -1244,16 +1244,17 @@ enum CellColorPosition {
  * This is much slower than just calling `Terminal.reset` but testing some features needs this
  * treatment.
  */
-export function injectSharedRendererTestsStandalone(ctx: ISharedRendererTestContext): void {
+export function injectSharedRendererTestsStandalone(ctx: ISharedRendererTestContext, setupCb: () => Promise<void> | void): void {
   test.describe('standalone tests', () => {
     test.beforeEach(async () => {
       // Recreate terminal
       await openTerminal(ctx.value);
-      ctx.value.page.evaluate(`
+      await ctx.value.page.evaluate(`
         window.term.options.minimumContrastRatio = 1;
         window.term.options.allowTransparency = false;
         window.term.options.theme = undefined;
       `);
+      await setupCb();
       // Clear the cached screenshot before each test
       frameDetails = undefined;
     });