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node_file_test.ts
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node_file_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { writeBuffer } from "./node_file.ts";
import { assertEquals } from "../../testing/asserts.ts";
import { isWindows } from "../../_util/os.ts";
Deno.test("[node/internal_binding/node_file] writeBuffer", async () => {
const tempfile = await Deno.makeTempFile();
await Deno.writeTextFile(tempfile, "01234567890123456789");
const file = await Deno.open(tempfile, { write: true });
await Deno.seek(file.rid, 5, Deno.SeekMode.Start);
try {
const ctx: { errno?: number } = {};
const bytesWritten = writeBuffer(
file.rid,
new Uint8Array([65, 66, 67, 68, 69] /* abcde */),
1,
3,
5,
ctx,
);
assertEquals(await Deno.readTextFile(tempfile), "0123456789BCD3456789");
assertEquals(bytesWritten, 3);
assertEquals(typeof ctx.errno, "undefined");
} finally {
Deno.close(file.rid);
await Deno.remove(tempfile);
}
});
Deno.test("[node/internal_binding/node_file] writeBuffer", async () => {
const tempfile = await Deno.makeTempFile();
await Deno.writeTextFile(tempfile, "01234567890123456789");
const file = await Deno.open(tempfile, { read: true, write: false });
try {
const ctx: { errno?: number } = {};
const bytesWritten = writeBuffer(
file.rid,
new Uint8Array([65, 66, 67, 68, 69] /* abcde */),
1,
3,
5,
ctx,
);
assertEquals(bytesWritten, 0);
if (isWindows) {
assertEquals(ctx.errno, 5); // Access is denied
} else {
assertEquals(ctx.errno, 9); // Bad file descriptor
}
} finally {
Deno.close(file.rid);
await Deno.remove(tempfile);
}
});