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feat(std/node): Add Buffer.allocUnsafe (#6533)

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Marcos Casagrande 2020-06-28 16:16:54 +02:00 committed by GitHub
parent 2da0840583
commit d779053dc6
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2 changed files with 23 additions and 2 deletions
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9
std/node/buffer.ts
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@ -60,8 +60,9 @@ export default class Buffer extends Uint8Array {
if (typeof fill === "string" && fill.length === 1 && encoding === "utf8")
buf.fill(fill.charCodeAt(0));
else bufFill = Buffer.from(fill, encoding);
} else if (typeof fill === "number") buf.fill(fill);
else if (fill instanceof Uint8Array) {
} else if (typeof fill === "number") {
buf.fill(fill);
} else if (fill instanceof Uint8Array) {
if (fill.length === 0) {
throw new TypeError(
`The argument "value" is invalid. Received ${fill.constructor.name} []`
@ -89,6 +90,10 @@ export default class Buffer extends Uint8Array {
return buf;
}
static allocUnsafe(size: number): Buffer {
return new Buffer(size);
}
/**
* Returns the byte length of a string when encoded. This is not the same as
* String.prototype.length, which does not account for the encoding that is

16
std/node/buffer_test.ts
View file

@ -96,6 +96,22 @@ Deno.test({
},
});
Deno.test({
name: "allocUnsafe allocates a buffer with the expected size",
fn() {
const buffer: Buffer = Buffer.allocUnsafe(1);
assertEquals(buffer.length, 1, "Buffer size should be 1");
},
});
Deno.test({
name: "allocUnsafe(0) creates an empty buffer",
fn() {
const buffer: Buffer = Buffer.allocUnsafe(0);
assertEquals(buffer.length, 0, "Buffer size should be 0");
},
});
Deno.test({
name: "alloc filled correctly with integer",
fn() {