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std/fmt/bytes_test.ts

Deno standard library
denoland/deno_std
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.// Copyright 2014-2021 Sindre Sorhus. All rights reserved. MIT license.// Copyright 2021 Yoshiya Hinosawa. All rights reserved. MIT license.
import { format } from "./bytes.ts";import { assertEquals, assertThrows } from "../testing/asserts.ts";
const parts = new Intl.NumberFormat().formatToParts(1000.1);const decimal = parts.find(({ type }) => type === "decimal")!.value;const group = parts.find(({ type }) => type === "group")!.value;
Deno.test("throws on invalid input", () => {  // deno-lint-ignore no-explicit-any  assertThrows(() => format("" as any));  // deno-lint-ignore no-explicit-any  assertThrows(() => format("1" as any));  assertThrows(() => format(NaN));  // deno-lint-ignore no-explicit-any  assertThrows(() => format(true as any));  assertThrows(() => format(Infinity));  assertThrows(() => format(-Infinity));  // deno-lint-ignore no-explicit-any  assertThrows(() => format(null as any));});
Deno.test("converts bytes to human readable strings", () => {  assertEquals(format(0), "0 B");  assertEquals(format(0.4), "0.4 B");  assertEquals(format(0.7), "0.7 B");  assertEquals(format(10), "10 B");  assertEquals(format(10.1), "10.1 B");  assertEquals(format(999), "999 B");  assertEquals(format(1001), "1 kB");  assertEquals(format(1001), "1 kB");  assertEquals(format(1e16), "10 PB");  assertEquals(format(1e30), "1000000 YB");});
Deno.test("supports negative number", () => {  assertEquals(format(-0.4), "-0.4 B");  assertEquals(format(-0.7), "-0.7 B");  assertEquals(format(-10.1), "-10.1 B");  assertEquals(format(-999), "-999 B");  assertEquals(format(-1001), "-1 kB");});
Deno.test("locale option", () => {  assertEquals(format(-0.4, { locale: "de" }), "-0,4 B");  assertEquals(format(0.4, { locale: "de" }), "0,4 B");  assertEquals(format(1001, { locale: "de" }), "1 kB");  assertEquals(format(10.1, { locale: "de" }), "10,1 B");  assertEquals(format(1e30, { locale: "de" }), "1.000.000 YB");
  assertEquals(format(-0.4, { locale: "en" }), "-0.4 B");  assertEquals(format(0.4, { locale: "en" }), "0.4 B");  assertEquals(format(1001, { locale: "en" }), "1 kB");  assertEquals(format(10.1, { locale: "en" }), "10.1 B");  assertEquals(format(1e30, { locale: "en" }), "1,000,000 YB");
  assertEquals(    format(-0.4, { locale: ["unknown", "de", "en"] }),    "-0,4 B",  );  assertEquals(format(0.4, { locale: ["unknown", "de", "en"] }), "0,4 B");  assertEquals(format(1001, { locale: ["unknown", "de", "en"] }), "1 kB");  assertEquals(    format(10.1, { locale: ["unknown", "de", "en"] }),    "10,1 B",  );  assertEquals(    format(1e30, { locale: ["unknown", "de", "en"] }),    "1.000.000 YB",  );
  assertEquals(format(-0.4, { locale: true }), `-0${decimal}4 B`);  assertEquals(format(0.4, { locale: true }), `0${decimal}4 B`);  assertEquals(format(1001, { locale: true }), "1 kB");  assertEquals(format(10.1, { locale: true }), `10${decimal}1 B`);  assertEquals(    format(1e30, { locale: true }),    `1${group}000${group}000 YB`,  );
  assertEquals(format(-0.4, { locale: false }), "-0.4 B");  assertEquals(format(0.4, { locale: false }), "0.4 B");  assertEquals(format(1001, { locale: false }), "1 kB");  assertEquals(format(10.1, { locale: false }), "10.1 B");  assertEquals(format(1e30, { locale: false }), "1000000 YB");
  assertEquals(format(-0.4, { locale: undefined }), "-0.4 B");  assertEquals(format(0.4, { locale: undefined }), "0.4 B");  assertEquals(format(1001, { locale: undefined }), "1 kB");  assertEquals(format(10.1, { locale: undefined }), "10.1 B");  assertEquals(format(1e30, { locale: undefined }), "1000000 YB");});
Deno.test("signed option", () => {  assertEquals(format(42, { signed: true }), "+42 B");  assertEquals(format(-13, { signed: true }), "-13 B");  assertEquals(format(0, { signed: true }), " 0 B");});
Deno.test("bits option", () => {  assertEquals(format(0, { bits: true }), "0 b");  assertEquals(format(0.4, { bits: true }), "0.4 b");  assertEquals(format(0.7, { bits: true }), "0.7 b");  assertEquals(format(10, { bits: true }), "10 b");  assertEquals(format(10.1, { bits: true }), "10.1 b");  assertEquals(format(999, { bits: true }), "999 b");  assertEquals(format(1001, { bits: true }), "1 kbit");  assertEquals(format(1001, { bits: true }), "1 kbit");  assertEquals(format(1e16, { bits: true }), "10 Pbit");  assertEquals(format(1e30, { bits: true }), "1000000 Ybit");});
Deno.test("binary option", () => {  assertEquals(format(0, { binary: true }), "0 B");  assertEquals(format(4, { binary: true }), "4 B");  assertEquals(format(10, { binary: true }), "10 B");  assertEquals(format(10.1, { binary: true }), "10.1 B");  assertEquals(format(999, { binary: true }), "999 B");  assertEquals(format(1025, { binary: true }), "1 kiB");  assertEquals(format(1001, { binary: true }), "1000 B");  assertEquals(format(1e16, { binary: true }), "8.88 PiB");  assertEquals(format(1e30, { binary: true }), "827000 YiB");});
Deno.test("bits and binary option", () => {  assertEquals(format(0, { bits: true, binary: true }), "0 b");  assertEquals(format(4, { bits: true, binary: true }), "4 b");  assertEquals(format(10, { bits: true, binary: true }), "10 b");  assertEquals(format(999, { bits: true, binary: true }), "999 b");  assertEquals(format(1025, { bits: true, binary: true }), "1 kibit");  assertEquals(format(1e6, { bits: true, binary: true }), "977 kibit");});
Deno.test("fractional digits options", () => {  assertEquals(    format(1900, { maximumFractionDigits: 1 }),    `1${decimal}9 kB`,  );  assertEquals(    format(1900, { minimumFractionDigits: 3 }),    `1${decimal}900 kB`,  );  assertEquals(    format(1911, { maximumFractionDigits: 1 }),    `1${decimal}9 kB`,  );  assertEquals(    format(1111, { maximumFractionDigits: 2 }),    `1${decimal}11 kB`,  );  assertEquals(    format(1019, { maximumFractionDigits: 3 }),    `1${decimal}019 kB`,  );  assertEquals(    format(1001, { maximumFractionDigits: 3 }),    `1${decimal}001 kB`,  );  assertEquals(    format(1000, { minimumFractionDigits: 1, maximumFractionDigits: 3 }),    `1${decimal}0 kB`,  );  assertEquals(    format(3942, { minimumFractionDigits: 1, maximumFractionDigits: 2 }),    `3${decimal}94 kB`,  );  assertEquals(    format(4001, { maximumFractionDigits: 3, binary: true }),    `3${decimal}907 kiB`,  );  assertEquals(    format(18717, { maximumFractionDigits: 2, binary: true }),    `18${decimal}28 kiB`,  );  assertEquals(    format(18717, { maximumFractionDigits: 4, binary: true }),    `18${decimal}2783 kiB`,  );  assertEquals(    format(32768, {      minimumFractionDigits: 2,      maximumFractionDigits: 3,      binary: true,    }),    `32${decimal}00 kiB`,  );  assertEquals(    format(65536, {      minimumFractionDigits: 1,      maximumFractionDigits: 3,      binary: true,    }),    `64${decimal}0 kiB`,  );});