Testing in Cypress to determine if one date is half a year before another can be achieved using date manipulation functions and assertions

Question

Testing in Cypress to determine if one date is half a year before another can be achieved using date manipulation functions and assertions

I'm currently working on testing an SVG graph with dynamic dates on the x-axis. For demonstration purposes, let's assume that the early date is 'Feb 22' and the later date is 'Aug 22'.

While I can extract values from each element in the graph and save them as variables, I'm struggling to figure out how to verify that the early date is always 6 months before the later date using Cypress. This is what I have so far:

//To retrieve the value of the later date
cy.get("laterDateSelector").invoke('text').as('val');
  cy.get('@val').then((val) => {
   let laterDate = val;

//Assertion, this is where I'm stuck
cy.get('earlyDateSelector').should('equal', 'Need this part to be equal: laterDate minus 6 months in the format MMM yy');

javascript typescript cypress

Answer 1

Answer №1

If you utilize the dayjs library, the process becomes quite simple.

Your date strings can be parsed directly, followed by conducting subtraction on the $M attributes.

import dayjs from 'dayjs';

it('verifies a 6-month gap between dates', () => {
  
  cy.get("earlyDateSelector").invoke('text').then(earlyDate => {       // 'Feb 22'
    cy.get("laterDateSelector").invoke('text').should(laterDate => {     // 'Aug 22'

      const early = dayjs(`01 ${earlyDate}`)  // '01 Feb 22'
      const later = dayjs(`01 ${laterDate}`)  // '01 Aug 22'

      expect(later.$M - early.$M).to.eq(6)

      // alternatively, for better handling across different years

      expect(end.diff(start, 'M')).to.eq(6)

    })
  })
})

Answer 2

If you utilize the dayjs library, the process becomes quite simple.

Your date strings can be parsed directly, followed by conducting subtraction on the $M attributes.

import dayjs from 'dayjs';

it('verifies a 6-month gap between dates', () => {
  
  cy.get("earlyDateSelector").invoke('text').then(earlyDate => {       // 'Feb 22'
    cy.get("laterDateSelector").invoke('text').should(laterDate => {     // 'Aug 22'

      const early = dayjs(`01 ${earlyDate}`)  // '01 Feb 22'
      const later = dayjs(`01 ${laterDate}`)  // '01 Aug 22'

      expect(later.$M - early.$M).to.eq(6)

      // alternatively, for better handling across different years

      expect(end.diff(start, 'M')).to.eq(6)

    })
  })
})

Testing in Cypress to determine if one date is half a year before another can be achieved using date manipulation functions and assertions

Answer №1

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