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add encodeInto to TextEncoder (#2558)

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andy finch 2019-06-21 18:32:14 -04:00 • committed by Ryan Dahl
parent 20f41e719d
commit eb93dc58a1
2 changed files with 65 additions and 1 deletions
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31
js/text_encoding_test.ts
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@ -91,7 +91,7 @@ test(function textDecoderErrorEncoding(): void {
assert(didThrow);
});
test(function textEncoder2(): void {
test(function textEncoder(): void {
const fixture = "𝓽𝓮𝔁𝓽";
const encoder = new TextEncoder();
// prettier-ignore
@ -103,6 +103,35 @@ test(function textEncoder2(): void {
]);
});
test(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);
// prettier-ignore
assertEquals(Array.from(bytes), [
0x74, 0x65, 0x78, 0x74, 0x00,
]);
});
test(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);
// prettier-ignore
assertEquals(Array.from(bytes), [
0xf0, 0x9d, 0x93, 0xbd,
0xf0, 0x9d, 0x93, 0xae,
0xf0, 0x9d, 0x94, 0x81,
0xf0, 0x9d, 0x93, 0xbd, 0x00,
]);
});
test(function textDecoderSharedUint8Array(): void {
const ab = new SharedArrayBuffer(6);
const dataView = new DataView(ab);