How to check strict equality of floating numbers in jest

Question

  it('returns the median for even number of grades', () => {
    const grades = [80, 90, 85, 110, 100, 60]
    const expectedMedian = 87.50
    const median = calculateMedian(grades)
    expect(median).toBe(expectedMedian)
  })

This test passes but I don't want, 87.5 to equal with 87.50 .

Answer 1

in numerics I've learned, that you rather want to check, whether the difference of two floating point numbers is below a (small) treshold.

See Machine epsilon .

So use toBeLessThanOrEqual of Jest here.