client/js/src/test/mock_eventsource.ts

import { vi } from "vitest";

if (process.env.TEST_MODE !== "node") {
	Object.defineProperty(window, "EventSource", {
		writable: true,
		value: vi.fn().mockImplementation(() => ({
			close: vi.fn(() => {}),
			addEventListener: vi.fn(),
			onmessage: vi.fn((_event: MessageEvent) => {}),
			onerror: vi.fn((_event: Event) => {})
		}))
	});
}