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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
import {
assertEquals,
assertThrows,
assertThrowsAsync,
unitTest,
} from "./test_util.ts";
unitTest(
{ perms: { read: true, write: true } },
function ftruncateSyncSuccess() {
const filename = Deno.makeTempDirSync() + "/test_ftruncateSync.txt";
const file = Deno.openSync(filename, {
create: true,
read: true,
write: true,
});
Deno.ftruncateSync(file.rid, 20);
assertEquals(Deno.readFileSync(filename).byteLength, 20);
Deno.ftruncateSync(file.rid, 5);
assertEquals(Deno.readFileSync(filename).byteLength, 5);
Deno.ftruncateSync(file.rid, -5);
assertEquals(Deno.readFileSync(filename).byteLength, 0);
Deno.close(file.rid);
Deno.removeSync(filename);
},
);
unitTest(
{ perms: { read: true, write: true } },
async function ftruncateSuccess() {
const filename = Deno.makeTempDirSync() + "/test_ftruncate.txt";
const file = await Deno.open(filename, {
create: true,
read: true,
write: true,
});
await Deno.ftruncate(file.rid, 20);
assertEquals((await Deno.readFile(filename)).byteLength, 20);
await Deno.ftruncate(file.rid, 5);
assertEquals((await Deno.readFile(filename)).byteLength, 5);
await Deno.ftruncate(file.rid, -5);
assertEquals((await Deno.readFile(filename)).byteLength, 0);
Deno.close(file.rid);
await Deno.remove(filename);
},
);
unitTest(
{ perms: { 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);
},
);
unitTest(
{ perms: { 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);
},
);
unitTest({ perms: { write: false } }, function truncateSyncPerm() {
assertThrows(() => {
Deno.truncateSync("/test_truncateSyncPermission.txt");
}, Deno.errors.PermissionDenied);
});
unitTest({ perms: { write: false } }, async function truncatePerm() {
await assertThrowsAsync(async () => {
await Deno.truncate("/test_truncatePermission.txt");
}, Deno.errors.PermissionDenied);
});
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