testing: Set MouseEvent.buttons when simulating mouse events.

abhiomkar · copybara-github · commit cc2e892bbf94 · 2022-05-11T09:34:30.000-07:00
PiperOrigin-RevId: 448014072
diff --git a/components/testing/harness.ts b/components/testing/harness.ts
@@ -481,6 +481,7 @@ export class Harness<E extends HTMLElement = HTMLElement> {
       clientY: (rect.top + rect.bottom) / 2,
       screenX: (rect.left + rect.right) / 2,
       screenY: (rect.top + rect.bottom) / 2,
+      buttons: 1,  // Primary button (usually the left button)
     };
   }
 

Original file line number	Diff line number	Diff line change
`@@ -481,6 +481,7 @@ export class Harness<E extends HTMLElement = HTMLElement> {`
`481`	`481`	`clientY: (rect.top + rect.bottom) / 2,`
`482`	`482`	`screenX: (rect.left + rect.right) / 2,`
`483`	`483`	`screenY: (rect.top + rect.bottom) / 2,`
	`484`	`+ buttons: 1, // Primary button (usually the left button)`
`484`	`485`	`};`
`485`	`486`	`}`
`486`	`487`