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JavaScript API

jslib

k6-testing

Retrying Assertions

toHaveAttribute()

Open source

toHaveAttribute()

The toHaveAttribute() method asserts that an element has a specific attribute and optionally a specific value. This is a retrying assertion that automatically waits for the element to have the expected attribute.

Syntax

await expect(locator).toHaveAttribute(attribute);
await expect(locator).toHaveAttribute(attribute, value);
await expect(locator).toHaveAttribute(attribute, value, options);
await expect(locator).not.toHaveAttribute(attribute);

Parameters

Parameter	Type	Description
attribute	string	The attribute name to check for
value	string	Optional. The expected attribute value
options	RetryConfig	Optional configuration options

Returns

Type	Description
Promise	A promise that resolves when the assertion passes

Description

The toHaveAttribute() method checks if an element has a specific attribute. When called with just an attribute name, it verifies the attribute exists regardless of its value. When called with both attribute name and value, it verifies the attribute exists and has the exact specified value.

This is a retrying assertion that will automatically re-check the element’s attributes until the condition is met or the timeout is reached.

Usage

import { browser } from 'k6/browser';
import { expect } from 'https://jslib.k6.io/k6-testing/0.6.1/index.js';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  }
};

export default async function () {
  const page = await browser.newPage();
  await page.goto('https://quickpizza.grafana.com/');

  // Check that the pizza button has specific attributes
  await expect(page.locator('button[name="pizza-please"]')).toHaveAttribute('name', 'pizza-please');
  await expect(page.locator('button[name="pizza-please"]')).toHaveAttribute('type', 'button');

  // Check that the main heading has expected attributes
  await expect(page.locator('h1')).toHaveAttribute('class');

  // Click the pizza button to get a recommendation
  await page.locator('button[name="pizza-please"]').click();

  // Check that the recommendation heading has an id attribute
  await expect(page.locator('h2[id="pizza-name"]')).toHaveAttribute('id', 'pizza-name');

  // Check absence of attribute on non-existent elements
  await expect(page.locator('h1')).not.toHaveAttribute('disabled');
}