Tauri-demo: the IPC test

greeter.test.ipc.ts

    it('should set the greeting message inside the message element', async () => {
        const greeter = document.createElement('yag-greeter');
        const name = 'John Doe';
        const greetForm = greeter.shadowRoot?.querySelector('#greet-form') as HTMLFormElement;
        const greetInput = greeter.shadowRoot?.querySelector('#greet-input') as HTMLInputElement;
        const greetMsgEl = greeter.shadowRoot?.querySelector('#greet-msg') as HTMLElement;

        greetInput.value = name;
    
        mockIPC((cmd, args) => {
          if(cmd === "greet") {
              return `Hello, ${args.name}! You've been greeted from Rust!`;
          }
        });
    
        greetForm.dispatchEvent(new Event("submit"));
        await new Promise((resolve) => setTimeout(resolve, 0));
        
        expect(greetMsgEl?.textContent).toBe(`Hello, ${name}! You've been greeted from Rust!`);
    });