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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals, assertRejects, assertThrows } from "./test_util.ts";
Deno.test(
{ permissions: { read: true, write: true } },
function ftruncateSyncSuccess() {
const filename = Deno.makeTempDirSync() + "/test_ftruncateSync.txt";
using file = Deno.openSync(filename, {
create: true,
read: true,
write: true,
});
file.truncateSync(20);
assertEquals(Deno.readFileSync(filename).byteLength, 20);
file.truncateSync(5);
assertEquals(Deno.readFileSync(filename).byteLength, 5);
file.truncateSync(-5);
assertEquals(Deno.readFileSync(filename).byteLength, 0);
Deno.removeSync(filename);
},
);
Deno.test(
{ permissions: { read: true, write: true } },
async function ftruncateSuccess() {
const filename = Deno.makeTempDirSync() + "/test_ftruncate.txt";
using file = await Deno.open(filename, {
create: true,
read: true,
write: true,
});
await file.truncate(20);
assertEquals((await Deno.readFile(filename)).byteLength, 20);
await file.truncate(5);
assertEquals((await Deno.readFile(filename)).byteLength, 5);
await file.truncate(-5);
assertEquals((await Deno.readFile(filename)).byteLength, 0);
await Deno.remove(filename);
},
);
Deno.test(
{ permissions: { read: true, write: true } },
function truncateSyncSuccess() {
const filename = Deno.makeTempDirSync() + "/test_truncateSync.txt";
Deno.writeFileSync(filename, new Uint8Array(5));
Deno.truncateSync(filename, 20);
assertEquals(Deno.readFileSync(filename).byteLength, 20);
Deno.truncateSync(filename, 5);
assertEquals(Deno.readFileSync(filename).byteLength, 5);
Deno.truncateSync(filename, -5);
assertEquals(Deno.readFileSync(filename).byteLength, 0);
Deno.removeSync(filename);
},
);
Deno.test(
{ permissions: { read: true, write: true } },
async function truncateSuccess() {
const filename = Deno.makeTempDirSync() + "/test_truncate.txt";
await Deno.writeFile(filename, new Uint8Array(5));
await Deno.truncate(filename, 20);
assertEquals((await Deno.readFile(filename)).byteLength, 20);
await Deno.truncate(filename, 5);
assertEquals((await Deno.readFile(filename)).byteLength, 5);
await Deno.truncate(filename, -5);
assertEquals((await Deno.readFile(filename)).byteLength, 0);
await Deno.remove(filename);
},
);
Deno.test({ permissions: { write: false } }, function truncateSyncPerm() {
assertThrows(() => {
Deno.truncateSync("/test_truncateSyncPermission.txt");
}, Deno.errors.NotCapable);
});
Deno.test({ permissions: { write: false } }, async function truncatePerm() {
await assertRejects(async () => {
await Deno.truncate("/test_truncatePermission.txt");
}, Deno.errors.NotCapable);
});
Deno.test(
{ permissions: { read: true, write: true } },
function truncateSyncNotFound() {
const filename = "/badfile.txt";
assertThrows(
() => {
Deno.truncateSync(filename);
},
Deno.errors.NotFound,
`truncate '${filename}'`,
);
},
);
Deno.test(
{ permissions: { read: true, write: true } },
async function truncateSyncNotFound() {
const filename = "/badfile.txt";
await assertRejects(
async () => {
await Deno.truncate(filename);
},
Deno.errors.NotFound,
`truncate '${filename}'`,
);
},
);
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