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toContainEqual()
The toContainEqual() method asserts that an array or set contains an element that is deeply equal to the expected value, using the same equality logic as toEqual().
Syntax
expect(actual).toContainEqual(expected);
expect(actual).not.toContainEqual(expected);Parameters
Returns
Description
The toContainEqual() method checks if an array or set contains an element that is deeply equal to the expected value. Unlike toContain(), which uses strict equality (===), toContainEqual() performs deep equality comparison, making it suitable for finding objects with matching content even if they are different instances.
Usage
import http from 'k6/http';
import { expect } from 'https://jslib.k6.io/k6-testing/0.6.1/index.js';
export default function () {
const response = http.get('https://quickpizza.grafana.com/');
// Create test data to demonstrate toContainEqual
const pizzaOptions = [
{ name: 'Margherita', toppings: ['tomato', 'mozzarella'] },
{ name: 'Pepperoni', toppings: ['tomato', 'mozzarella', 'pepperoni'] },
{ name: 'Veggie', toppings: ['tomato', 'mozzarella', 'peppers'] },
];
// Check if array contains specific pizza objects
expect(pizzaOptions).toContainEqual({
name: 'Margherita',
toppings: ['tomato', 'mozzarella'],
});
// Works with various data types
const mixedArray = ['string', 123, { key: 'value' }, [1, 2, 3]];
expect(mixedArray).toContainEqual({ key: 'value' });
expect(mixedArray).toContainEqual([1, 2, 3]);
expect(mixedArray).not.toContainEqual({ key: 'different' });
}
