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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
function assert(cond) {
if (!cond) {
throw Error("assert");
}
}
function assertArrayEquals(a1, a2) {
if (a1.length !== a2.length) throw Error("assert");
for (const index in a1) {
if (a1[index] !== a2[index]) {
throw Error("assert");
}
}
}
function btoaSuccess() {
const text = "hello world";
const encoded = btoa(text);
assert(encoded === "aGVsbG8gd29ybGQ=");
}
function atobSuccess() {
const encoded = "aGVsbG8gd29ybGQ=";
const decoded = atob(encoded);
assert(decoded === "hello world");
}
function atobWithAsciiWhitespace() {
const encodedList = [
" aGVsbG8gd29ybGQ=",
" aGVsbG8gd29ybGQ=",
"aGVsbG8gd29ybGQ= ",
"aGVsbG8gd29ybGQ=\n",
"aGVsbG\t8gd29ybGQ=",
`aGVsbG\t8g
d29ybGQ=`,
];
for (const encoded of encodedList) {
const decoded = atob(encoded);
assert(decoded === "hello world");
}
}
function atobThrows() {
let threw = false;
try {
atob("aGVsbG8gd29ybGQ==");
} catch (e) {
threw = true;
}
assert(threw);
}
function atobThrows2() {
let threw = false;
try {
atob("aGVsbG8gd29ybGQ===");
} catch (e) {
threw = true;
}
assert(threw);
}
function btoaFailed() {
let threw = false;
const text = "你好";
try {
btoa(text);
} catch (e) {
assert(e instanceof TypeError);
threw = true;
}
assert(threw);
}
function textDecoder2() {
// deno-fmt-ignore
const fixture = new Uint8Array([
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd
]);
const decoder = new TextDecoder();
assert(decoder.decode(fixture) === "𝓽𝓮𝔁𝓽");
}
function textDecoderIgnoreBOM() {
// deno-fmt-ignore
const fixture = new Uint8Array([
0xef, 0xbb, 0xbf,
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd
]);
const decoder = new TextDecoder("utf-8", { ignoreBOM: true });
assert(decoder.decode(fixture) === "𝓽𝓮𝔁𝓽");
}
function textDecoderNotBOM() {
// deno-fmt-ignore
const fixture = new Uint8Array([
0xef, 0xbb, 0x89,
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd
]);
const decoder = new TextDecoder("utf-8", { ignoreBOM: true });
assert(decoder.decode(fixture) === "ﻉ𝓽𝓮𝔁𝓽");
}
function textDecoderASCII() {
const fixture = new Uint8Array([0x89, 0x95, 0x9f, 0xbf]);
const decoder = new TextDecoder("ascii");
assert(decoder.decode(fixture) === "‰•Ÿ¿");
}
function textDecoderErrorEncoding() {
let didThrow = false;
try {
new TextDecoder("foo");
} catch (e) {
didThrow = true;
assert(e.message === "The encoding label provided ('foo') is invalid.");
}
assert(didThrow);
}
function textEncoder() {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
// deno-fmt-ignore
assertArrayEquals(Array.from(encoder.encode(fixture)), [
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd
]);
}
function textEncodeInto() {
const fixture = "text";
const encoder = new TextEncoder();
const bytes = new Uint8Array(5);
const result = encoder.encodeInto(fixture, bytes);
assert(result.read === 4);
assert(result.written === 4);
// deno-fmt-ignore
assertArrayEquals(Array.from(bytes), [
0x74, 0x65, 0x78, 0x74, 0x00,
]);
}
function textEncodeInto2() {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
const bytes = new Uint8Array(17);
const result = encoder.encodeInto(fixture, bytes);
assert(result.read === 8);
assert(result.written === 16);
// deno-fmt-ignore
assertArrayEquals(Array.from(bytes), [
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd, 0x00,
]);
}
function textEncodeInto3() {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
const bytes = new Uint8Array(5);
const result = encoder.encodeInto(fixture, bytes);
assert(result.read === 2);
assert(result.written === 4);
// deno-fmt-ignore
assertArrayEquals(Array.from(bytes), [
0xf0, 0x9d, 0x93, 0xbd, 0x00,
]);
}
function textDecoderSharedUint8Array() {
const ab = new SharedArrayBuffer(6);
const dataView = new DataView(ab);
const charCodeA = "A".charCodeAt(0);
for (let i = 0; i < ab.byteLength; i++) {
dataView.setUint8(i, charCodeA + i);
}
const ui8 = new Uint8Array(ab);
const decoder = new TextDecoder();
const actual = decoder.decode(ui8);
assert(actual === "ABCDEF");
}
function textDecoderSharedInt32Array() {
const ab = new SharedArrayBuffer(8);
const dataView = new DataView(ab);
const charCodeA = "A".charCodeAt(0);
for (let i = 0; i < ab.byteLength; i++) {
dataView.setUint8(i, charCodeA + i);
}
const i32 = new Int32Array(ab);
const decoder = new TextDecoder();
const actual = decoder.decode(i32);
assert(actual === "ABCDEFGH");
}
function toStringShouldBeWebCompatibility() {
const encoder = new TextEncoder();
assert(encoder.toString() === "[object TextEncoder]");
const decoder = new TextDecoder();
assert(decoder.toString() === "[object TextDecoder]");
}
function main() {
btoaSuccess();
atobSuccess();
atobWithAsciiWhitespace();
atobThrows();
atobThrows2();
btoaFailed();
textDecoder2();
textDecoderIgnoreBOM();
textDecoderNotBOM();
textDecoderASCII();
textDecoderErrorEncoding();
textEncoder();
textEncodeInto();
textEncodeInto2();
textEncodeInto3();
textDecoderSharedUint8Array();
textDecoderSharedInt32Array();
toStringShouldBeWebCompatibility();
}
main();
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