Button Functionality with test class in Lightning Web components

buttonFunctionality.html
<template>
   <lightning-button label="submit" onclick={handleClick}></lightning-button>
   <template if:true={isActive}>
	   <div class="ifBlock">
			Yes I am in if block
	   </div>
   </template>
   <template if:false={isActive}>
	   <div class="elseBlock">
			Yes I am in else block
	   </div>
   </template>
</template>


buttonFunctionality.js
import { LightningElement,track } from 'lwc';
export default class ButtonFunctionality extends LightningElement {
	@track isActive=false;
	handleClick(){
		this.isActive=true;
	}	
}


buttonFunctionality.test.js
import {createElement} from 'lwc';
import ButtonFunctionality from 'c/buttonFunctionality';
	describe('c-button-functionality',()=>{
		beforeEach(()=>{
		const element = createElement('c-button-functionality', {
			is: DemoTest
		})
		document.body.appendChild(element)
		})
		
	test('testing else block',()=>{
	const element=document.querySelector('c-button-functionality');
	const divElseText=element.shadowRoot.querySelector('div.elseBlock');
	expect(divElseText.textContent).toBe('Yes I am in else block');
	});
	
	test('testing if block',()=>{
	const element=document.querySelector('c-button-functionality');
	const inputButton=element.shadowRoot.querySelector('lightning-button');
	inputButton.dispatchEvent(new CustomEvent('click'));
	return Promise.resolve().then(()=>{
	const text=element.shadowRoot.querySelector('div.ifBlock');
	expect(text.textContent).toBe('Yes I am in if block');
	});

	});
})