@angular/material/fesm2022/form-field/testing/control.mjs

Angular Material

import { ComponentHarness } from '@angular/cdk/testing';

/**
 * Base class for custom form-field control harnesses. Harnesses for
 * custom controls with form-fields need to implement this interface.
 */
class MatFormFieldControlHarness extends ComponentHarness {
}
/**
 * Shared behavior for `MatFormFieldControlHarness` implementations
 */
class MatFormFieldControlHarnessBase extends MatFormFieldControlHarness {
    _floatingLabelSelector = '.mdc-floating-label';
    /** Gets the text content of the floating label, if it exists. */
    async getLabel() {
        const documentRootLocator = this.documentRootLocatorFactory();
        const labelId = await (await this.host()).getAttribute('aria-labelledby');
        const hostId = await (await this.host()).getAttribute('id');
        if (labelId) {
            // First option, try to fetch the label using the `aria-labelledby`
            // attribute.
            const labelEl = await documentRootLocator.locatorForOptional(`${this._floatingLabelSelector}[id="${labelId}"]`)();
            return labelEl ? labelEl.text() : null;
        }
        else if (hostId) {
            // Fallback option, try to match the id of the input with the `for`
            // attribute of the label.
            const labelEl = await documentRootLocator.locatorForOptional(`${this._floatingLabelSelector}[for="${hostId}"]`)();
            return labelEl ? labelEl.text() : null;
        }
        return null;
    }
}

export { MatFormFieldControlHarness, MatFormFieldControlHarnessBase };
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