externalisLessThan

Callable

• isLessThan(...answerableArguments: [expected: Answerable<number>]): Expectation<number>

---

• Creates an expectation that is met when the actual value of type number is less than the expected number.

  Ensuring that a given number is less than the expected number

  import { actorCalled } from '@serenity-js/core'
  import { Ensure, isLessThan } from '@serenity-js/assertions'
  
  await actorCalled('Ester').attemptsTo(
    Ensure.that(5, isLessThan(10)),
  )

  Ensuring that a given number is within the expected range

  import { actorCalled, Expectation, d } from '@serenity-js/core'
  import { Ensure, and, equals, isGreaterThan, isLessThan, or } from '@serenity-js/assertions'
  
  const isWithinRange = (lowerBound: Answerable<number>, upperBound: Answerable<number>) =>
    Expectation.to(d`have value that is between ${ lowerBound } and ${ upperBound }`)
      .soThatActual(
        and(
          or(equals(lowerBound), isGreaterThan(lowerBound)),
          or(equals(upperBound), isLessThan(upperBound)),
        )
      ),
  
  await actorCalled('Ester').attemptsTo(
    Ensure.that(
      7,
      isWithinRange(5, 10)
    ),
  )

  ---

  Parameters

  • externalrest...answerableArguments: [expected: Answerable<number>]

  Returns Expectation<number>