std/fmt/duration_test.ts

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals, assertExists } from "@std/assert";
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 default style (narrow)",
  fn() {
    assertEquals(
      // @ts-expect-error: explicitly giving undefined
      format(99674, { style: undefined }),
      "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");
  },
});