import { AssertionError } from "assert" ; author Sindre Sorhus + fork contributions from Alex Birch
 *  license export const assertFloatEqual = ( a , b , tolerance = Number . EPSILON ) : void => { if ( a === b ) { return ; } const diff = Math . abs ( a - b ) ; if ( diff < tolerance ) { return ; } if ( diff <= tolerance * Math . min ( Math . abs ( a ) , Math . abs ( b ) ) ) { return ; } throw new AssertionError ( { operator : `within ${ tolerance } of` , expected : `${ b } (difference: ${ diff })` , actual : a } ) ; } ;