Module

std/assert/mod.ts>assertAlmostEquals

The Deno Standard Library
denoland/deno_std
Latest
function assertAlmostEquals
import { assertAlmostEquals } from "https://dotland.deno.dev/std@0.224.0/assert/mod.ts";

Make an assertion that actual and expected are almost equal numbers through a given tolerance. It can be used to take into account IEEE-754 double-precision floating-point representation limitations. If the values are not almost equal then throw.

Examples

Example 1

import { assertAlmostEquals } from "https://deno.land/std@0.224.0/assert/mod.ts";

assertAlmostEquals(0.01, 0.02, 0.1); // Doesn't throw
assertAlmostEquals(0.01, 0.02); // Throws
assertAlmostEquals(0.1 + 0.2, 0.3, 1e-16); // Doesn't throw
assertAlmostEquals(0.1 + 0.2, 0.3, 1e-17); // Throws

Parameters

actual: number
expected: number
optional
tolerance = [UNSUPPORTED]
optional
msg: string