@ngneat/spectator/esm2022/lib/select-option.mjs

A powerful tool to simplify your Angular tests

import { dispatchFakeEvent } from './dispatch-events';
import { isString, isHTMLOptionElementArray } from './types';
/**
 * Focuses a select element, selects the correct options and dispatches
 * the `change` event, simulating the user selecting an option
 * @param options Options to be selected.
 * @param element Element onto which to select the options.
 * @param config Object with extra config to dispatch change event when option selected
 *
 * selectOption('al' | ['al', 'ab'], select, config);
 */
export function selectOption(options, element, config) {
    if (!(element instanceof HTMLSelectElement)) {
        return;
    }
    element.focus();
    if (isString(options)) {
        const option = element.querySelector(`option[value="${options}"]`);
        if (!option) {
            return;
        }
        setOptionSelected(option, element, config);
    }
    else if (options instanceof HTMLOptionElement) {
        setOptionSelected(options, element, config);
    }
    else {
        if (!element.multiple) {
            return;
        }
        if (isHTMLOptionElementArray(options)) {
            options.forEach((option) => setOptionSelected(option, element, config));
        }
        else {
            element.querySelectorAll('option').forEach((opt) => {
                if (options.includes(opt.value)) {
                    setOptionSelected(opt, element, config);
                }
            });
        }
    }
}
/**
 * Set the option in the HTMLSelectElement to selected
 * @param option HTMLOptionElement to select
 * @param select HTMLSelectElement to add the options to
 * @param config Object with extra config to dispatch change event when option selected
 *
 * setOptionSelected(option, element, config);
 */
function setOptionSelected(option, select, config) {
    option.selected = true;
    if (config.emitEvents) {
        dispatchFakeEvent(select, 'change', true);
    }
}
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