Add mechanism for Electron to render toasts (#30765) (#30767)

Co-authored-by: Michael Telatynski <7t3chguy@gmail.com>

test/unit-tests/vector/platform/ElectronPlatform-test.ts

@@ -21,6 +21,7 @@ import DesktopCapturerSourcePicker from "../../../../src/components/views/elemen
 import ElectronPlatform from "../../../../src/vector/platform/ElectronPlatform";
 import { setupLanguageMock } from "../../../setup/setupLanguage";
 import { stubClient } from "../../../test-utils";
+import ToastStore from "../../../../src/stores/ToastStore.ts";
 
 jest.mock("../../../../src/rageshake/rageshake", () => ({
     flush: jest.fn(),
@@ -127,6 +128,19 @@ describe("ElectronPlatform", () => {
         expect(plat.ipc.call).toHaveBeenCalledWith("callDisplayMediaCallback", "source");
     });
 
+    it("should show a toast when showToast is fired", async () => {
+        new ElectronPlatform();
+        const spy = jest.spyOn(ToastStore.sharedInstance(), "addOrReplaceToast");
+
+        const [event, handler] = getElectronEventHandlerCall("showToast")!;
+        handler({} as any, { title: "title", description: "description" });
+
+        expect(event).toBeTruthy();
+        expect(spy).toHaveBeenCalledWith(
+            expect.objectContaining({ title: "title", props: expect.objectContaining({ description: "description" }) }),
+        );
+    });
+
     describe("updates", () => {
         it("dispatches on check updates action", () => {
             new ElectronPlatform();