Although Cypress imports the moment library, there are no built in commands for it that allow chaining, but you can add a custom command to make it easier.
The toMoment()
command must be chained off a previous selecting command like cy.get()
or cy.contains()
. It returns a moment object which you can then use invoke to call all the methods moment provides, and further chain .should()
to test the value returned from those methods.
For example,
Spec
Cypress.Commands.add('toMoment', {prevSubject: true}, (element) => {
return Cypress.moment(element[0].value);
});
it('input tests with moment', () => {
cy.visit('./app/moment-with-input.html');
cy.get('input').toMoment()
.invoke('isValid')
.should('eq', true);
cy.get('input').toMoment()
.invoke('format', 'dddd')
.should('eq', 'Saturday');
cy.get('input').toMoment()
.invoke('diff', Date(2020, 2, 5), 'days')
.should('eq', -391);
})
HTML fragment (put in '/app' folder of project)
<input id="date" class="input_date" id="XYZ" type="date" value="2019-01-12" on_input="table()">