assertAlmostEquals | /assert/assert_almost_equals.ts | std@0.222.0

Module

std/assert/assert_almost_equals.ts>assertAlmostEquals

The Deno Standard Library

denoland/deno_std

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assert_almost_equals.ts

assertAlmostEquals

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assert_instance_of.ts

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The Standard Library has been moved to JSR. See the blog post for details.

function assertAlmostEquals

import { assertAlmostEquals } from "https://deno.land/std@0.222.0/assert/assert_almost_equals.ts";

assertAlmostEquals(

actual: number,

expected: number,

tolerance?,

msg?: string,

)

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@0.222.0/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