[bidi] [js] Add realm destroyed event

Author: pujagani

javascript/node/selenium-webdriver/bidi/scriptManager.js

@@ -359,6 +359,10 @@ class ScriptManager {
     await this.subscribeAndHandleEvent('script.realmCreated', callback)
   }
 
+  async onRealmDestroyed(callback) {
+    await this.subscribeAndHandleEvent('script.realmDestroyed', callback)
+  }
+
   async subscribeAndHandleEvent(eventType, callback) {
     if (this._browsingContextIds != null) {
       await this.bidi.subscribe(eventType, this._browsingContextIds)

javascript/node/selenium-webdriver/test/bidi/script_test.js

@@ -1006,6 +1006,27 @@ suite(
         assert.notEqual(realmInfo.realmId, null)
         assert.equal(realmInfo.realmType, RealmType.WINDOW)
       })
+
+      xit('can listen to realm destroyed message', async function () {
+        const manager = await ScriptManager(undefined, driver)
+
+        let realmInfo = null
+
+        await manager.onRealmDestroyed((result) => {
+          realmInfo = result
+        })
+
+        const id = await driver.getWindowHandle()
+        const browsingContext = await BrowsingContext(driver, {
+          browsingContextId: id,
+        })
+
+        await browsingContext.close()
+
+        assert.notEqual(realmInfo, null)
+        assert.notEqual(realmInfo.realmId, null)
+        assert.equal(realmInfo.realmType, RealmType.WINDOW)
+      })
     })
   },
   {browsers: [Browser.FIREFOX]}