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@std/fmt@1.0.1
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denoland/std
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This package works with Cloudflare Workers, Node.js, Deno, Bun, Browsers
This package works with Cloudflare Workers
This package works with Node.js
This package works with Deno
This package works with Bun
This package works with Browsers
•JSR Score100%•
Downloads18,780/wk
•
Publisheda year ago (1.0.1)

Utilities for formatting values, such as adding colors to text, formatting durations, printf utils, formatting byte numbers.

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals, assertExists, assertThrows } from "jsr:@std/assert@^1.0.3";
import { format } from "./duration.ts";

Deno.test({
  name: "format() handles duration since epoch",
  fn() {
    assertExists(format(Date.now()));
  },
});

Deno.test({
  name: "format() handles narrow duration",
  fn() {
    assertEquals(format(99674), "0d 0h 1m 39s 674ms 0µs 0ns");
  },
});

Deno.test({
  name: "format() handles full duration",
  fn() {
    assertEquals(
      format(99674, { style: "full" }),
      "0 days, 0 hours, 1 minutes, 39 seconds, 674 milliseconds, 0 microseconds, 0 nanoseconds",
    );
  },
});

Deno.test({
  name: "format() handles digital duration",
  fn() {
    assertEquals(
      format(99674, { style: "digital" }),
      "00:00:01:39:674:000:000",
    );
  },
});

Deno.test({
  name: "format() handles negative duration",
  fn() {
    assertEquals(
      format(-99674, { style: "digital" }),
      "00:00:01:39:674:000:000",
    );
  },
});

Deno.test({
  name: "format() handles full duration ignore zero",
  fn() {
    assertEquals(
      format(99674, { style: "full", ignoreZero: true }),
      "1 minutes, 39 seconds, 674 milliseconds",
    );
  },
});

Deno.test({
  name: "format() handles narrow duration ignore zero",
  fn() {
    assertEquals(format(99674, { ignoreZero: true }), "1m 39s 674ms");
  },
});

Deno.test({
  name: "format() handles digital style ignore zero",
  fn() {
    assertEquals(
      format(99674, { ignoreZero: true, style: "digital" }),
      "00:00:01:39:674",
    );
  },
});

Deno.test({
  name: "format() handles duration rounding error",
  fn() {
    assertEquals(format(16.342, { ignoreZero: true }), "16ms 342µs");
  },
});

Deno.test({
  name: "format() handles default style error",
  fn() {
    assertThrows(
      () => {
        format(16.342, { style: undefined });
      },
      TypeError,
      `style must be "narrow", "full", or "digital"!`,
    );
  },
});