How do i clear a multi-select input using Cypress?

When using Cypress for automated testing, if you need to interact with multi-select inputs (e.g., multi-select dropdowns) and wish to clear the selected values, you can achieve this through several different methods. I will explain these methods in detail with specific code examples.

Method 1: Directly Setting to an Empty Array

For an HTML <select multiple> element, you can directly clear the selected values by setting its value to an empty array:

javascript
cy.get('select[multiple]').select([]);

Here, the select command is used with an empty array to indicate no options are selected.

Method 2: Deselecting Options Individually

If you need to deselect based on specific selected options, you can achieve this by clicking the selected options:

javascript
// Assume it's implemented with a set of checkboxes
 cy.get('.multi-select-checkbox:checked').each(($el) => {
   cy.wrap($el).click(); // Click each selected option to deselect it
 });

This code first finds all selected checkboxes and then iterates through them, clicking each to deselect.

Method 3: Resetting the Form

If the multi-select input is part of a form, you can directly reset the entire form to clear all fields, including the multi-select input:

javascript
cy.get('form').reset(); // Assuming your form has a reset button

Alternatively, if there is no reset button, you can reset it using JavaScript:

javascript
cy.get('form').invoke('reset');

Practical Example

Suppose you have a task management application with a multi-select dropdown for selecting task labels; you can use the following code to clear the selected labels:

javascript
describe('Clearing multi-select input values', () => {
  it('should be able to clear task label selections', () => {
    cy.visit('/tasks'); // Visit the tasks page
    cy.get('.task-labels-select').select(['urgent', 'office']); // Select some labels first
    cy.get('.task-labels-select').select([]); // Then clear the selection
    cy.get('.task-labels-select').should('have.value', ''); // Verify successful clearing
  });
});

Here, the select method is first used to select the labels, and then called again with an empty array to clear the selection.

These are several methods to clear multi-select input values in Cypress; depending on the specific use case and element type, you can choose the most suitable method.