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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { assert, assertEquals, assertThrows, unitTest } from "./test_util.ts";
unitTest(function btoaSuccess(): void {
const text = "hello world";
const encoded = btoa(text);
assertEquals(encoded, "aGVsbG8gd29ybGQ=");
});
unitTest(function atobSuccess(): void {
const encoded = "aGVsbG8gd29ybGQ=";
const decoded = atob(encoded);
assertEquals(decoded, "hello world");
});
unitTest(function atobWithAsciiWhitespace(): void {
const encodedList = [
" aGVsbG8gd29ybGQ=",
" aGVsbG8gd29ybGQ=",
"aGVsbG8gd29ybGQ= ",
"aGVsbG8gd29ybGQ=\n",
"aGVsbG\t8gd29ybGQ=",
`aGVsbG\t8g
d29ybGQ=`,
];
for (const encoded of encodedList) {
const decoded = atob(encoded);
assertEquals(decoded, "hello world");
}
});
unitTest(function atobThrows(): void {
let threw = false;
try {
atob("aGVsbG8gd29ybGQ==");
} catch (e) {
threw = true;
}
assert(threw);
});
unitTest(function atobThrows2(): void {
let threw = false;
try {
atob("aGVsbG8gd29ybGQ===");
} catch (e) {
threw = true;
}
assert(threw);
});
unitTest(function atobThrows3(): void {
let threw = false;
try {
atob("foobar!!");
} catch (e) {
if (
e instanceof DOMException &&
e.toString().startsWith("InvalidCharacterError:")
) {
threw = true;
}
}
assert(threw);
});
unitTest(function btoaFailed(): void {
const text = "你好";
assertThrows(() => {
btoa(text);
}, TypeError);
});
unitTest(function textDecoder2(): void {
// 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();
assertEquals(decoder.decode(fixture), "𝓽𝓮𝔁𝓽");
});
// ignoreBOM is tested through WPT
unitTest(function textDecoderASCII(): void {
const fixture = new Uint8Array([0x89, 0x95, 0x9f, 0xbf]);
const decoder = new TextDecoder("ascii");
assertEquals(decoder.decode(fixture), "‰•Ÿ¿");
});
unitTest(function textDecoderErrorEncoding(): void {
let didThrow = false;
try {
new TextDecoder("Foo");
} catch (e) {
didThrow = true;
assertEquals(e.message, "The encoding label provided ('Foo') is invalid.");
}
assert(didThrow);
});
unitTest(function textDecoderHandlesNotFoundInternalDecoder() {
let didThrow = false;
try {
new TextDecoder("gbk");
} catch (e) {
didThrow = true;
assert(e instanceof RangeError);
}
assert(didThrow);
});
unitTest(function textEncoder(): void {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
// deno-fmt-ignore
assertEquals(Array.from(encoder.encode(fixture)), [
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd
]);
});
unitTest(function textEncodeInto(): void {
const fixture = "text";
const encoder = new TextEncoder();
const bytes = new Uint8Array(5);
const result = encoder.encodeInto(fixture, bytes);
assertEquals(result.read, 4);
assertEquals(result.written, 4);
// deno-fmt-ignore
assertEquals(Array.from(bytes), [
0x74, 0x65, 0x78, 0x74, 0x00,
]);
});
unitTest(function textEncodeInto2(): void {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
const bytes = new Uint8Array(17);
const result = encoder.encodeInto(fixture, bytes);
assertEquals(result.read, 8);
assertEquals(result.written, 16);
// deno-fmt-ignore
assertEquals(Array.from(bytes), [
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd, 0x00,
]);
});
unitTest(function textEncodeInto3(): void {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
const bytes = new Uint8Array(5);
const result = encoder.encodeInto(fixture, bytes);
assertEquals(result.read, 2);
assertEquals(result.written, 4);
// deno-fmt-ignore
assertEquals(Array.from(bytes), [
0xf0, 0x9d, 0x93, 0xbd, 0x00,
]);
});
unitTest(function textDecoderSharedUint8Array(): void {
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);
assertEquals(actual, "ABCDEF");
});
unitTest(function textDecoderSharedInt32Array(): void {
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);
assertEquals(actual, "ABCDEFGH");
});
unitTest(function toStringShouldBeWebCompatibility(): void {
const encoder = new TextEncoder();
assertEquals(encoder.toString(), "[object TextEncoder]");
const decoder = new TextDecoder();
assertEquals(decoder.toString(), "[object TextDecoder]");
});
unitTest(function textEncoderShouldCoerceToString(): void {
const encoder = new TextEncoder();
const fixutreText = "text";
const fixture = {
toString() {
return fixutreText;
},
};
const bytes = encoder.encode(fixture as unknown as string);
const decoder = new TextDecoder();
const decoded = decoder.decode(bytes);
assertEquals(decoded, fixutreText);
});
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