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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import {
assertEquals,
assertThrows,
fail,
} from "../../../../test_util/std/assert/mod.ts";
import { ftruncate, ftruncateSync } from "node:fs";
Deno.test({
name: "ASYNC: no callback function results in Error",
fn() {
assertThrows(
() => {
// @ts-expect-error Argument of type 'number' is not assignable to parameter of type 'NoParamCallback'
ftruncate(123, 0);
},
Error,
"No callback function supplied",
);
},
});
Deno.test({
name: "ASYNC: truncate entire file contents",
async fn() {
const file: string = Deno.makeTempFileSync();
await Deno.writeFile(file, new TextEncoder().encode("hello world"));
const { rid } = await Deno.open(file, {
read: true,
write: true,
create: true,
});
await new Promise<void>((resolve, reject) => {
ftruncate(rid, (err: Error | null) => {
if (err !== null) reject();
else resolve();
});
})
.then(
() => {
const fileInfo: Deno.FileInfo = Deno.lstatSync(file);
assertEquals(fileInfo.size, 0);
},
() => {
fail("No error expected");
},
)
.finally(() => {
Deno.removeSync(file);
Deno.close(rid);
});
},
});
Deno.test({
name: "ASYNC: truncate file to a size of precisely len bytes",
async fn() {
const file: string = Deno.makeTempFileSync();
await Deno.writeFile(file, new TextEncoder().encode("hello world"));
const { rid } = await Deno.open(file, {
read: true,
write: true,
create: true,
});
await new Promise<void>((resolve, reject) => {
ftruncate(rid, 3, (err: Error | null) => {
if (err !== null) reject();
else resolve();
});
})
.then(
() => {
const fileInfo: Deno.FileInfo = Deno.lstatSync(file);
assertEquals(fileInfo.size, 3);
},
() => {
fail("No error expected");
},
)
.finally(() => {
Deno.removeSync(file);
Deno.close(rid);
});
},
});
Deno.test({
name: "SYNC: truncate entire file contents",
fn() {
const file: string = Deno.makeTempFileSync();
Deno.writeFileSync(file, new TextEncoder().encode("hello world"));
const { rid } = Deno.openSync(file, {
read: true,
write: true,
create: true,
});
try {
ftruncateSync(rid);
const fileInfo: Deno.FileInfo = Deno.lstatSync(file);
assertEquals(fileInfo.size, 0);
} finally {
Deno.removeSync(file);
Deno.close(rid);
}
},
});
Deno.test({
name: "SYNC: truncate file to a size of precisely len bytes",
fn() {
const file: string = Deno.makeTempFileSync();
Deno.writeFileSync(file, new TextEncoder().encode("hello world"));
const { rid } = Deno.openSync(file, {
read: true,
write: true,
create: true,
});
try {
ftruncateSync(rid, 3);
const fileInfo: Deno.FileInfo = Deno.lstatSync(file);
assertEquals(fileInfo.size, 3);
} finally {
Deno.removeSync(file);
Deno.close(rid);
}
},
});
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