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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
import { assert, assertEquals, assertThrows, unitTest } from "./test_util.ts";
unitTest(
{ perms: { read: true, write: true } },
function linkSyncSuccess() {
const testDir = Deno.makeTempDirSync();
const oldData = "Hardlink";
const oldName = testDir + "/oldname";
const newName = testDir + "/newname";
Deno.writeFileSync(oldName, new TextEncoder().encode(oldData));
// Create the hard link.
Deno.linkSync(oldName, newName);
// We should expect reading the same content.
const newData = new TextDecoder().decode(Deno.readFileSync(newName));
assertEquals(oldData, newData);
// Writing to newname also affects oldname.
const newData2 = "Modified";
Deno.writeFileSync(newName, new TextEncoder().encode(newData2));
assertEquals(
newData2,
new TextDecoder().decode(Deno.readFileSync(oldName)),
);
// Writing to oldname also affects newname.
const newData3 = "ModifiedAgain";
Deno.writeFileSync(oldName, new TextEncoder().encode(newData3));
assertEquals(
newData3,
new TextDecoder().decode(Deno.readFileSync(newName)),
);
// Remove oldname. File still accessible through newname.
Deno.removeSync(oldName);
const newNameStat = Deno.statSync(newName);
assert(newNameStat.isFile);
assert(!newNameStat.isSymlink); // Not a symlink.
assertEquals(
newData3,
new TextDecoder().decode(Deno.readFileSync(newName)),
);
},
);
unitTest(
{ perms: { read: true, write: true } },
function linkSyncExists() {
const testDir = Deno.makeTempDirSync();
const oldName = testDir + "/oldname";
const newName = testDir + "/newname";
Deno.writeFileSync(oldName, new TextEncoder().encode("oldName"));
// newname is already created.
Deno.writeFileSync(newName, new TextEncoder().encode("newName"));
assertThrows(() => {
Deno.linkSync(oldName, newName);
}, Deno.errors.AlreadyExists);
},
);
unitTest(
{ perms: { read: true, write: true } },
function linkSyncNotFound() {
const testDir = Deno.makeTempDirSync();
const oldName = testDir + "/oldname";
const newName = testDir + "/newname";
assertThrows(() => {
Deno.linkSync(oldName, newName);
}, Deno.errors.NotFound);
},
);
unitTest(
{ perms: { read: false, write: true } },
function linkSyncReadPerm() {
assertThrows(() => {
Deno.linkSync("oldbaddir", "newbaddir");
}, Deno.errors.PermissionDenied);
},
);
unitTest(
{ perms: { read: true, write: false } },
function linkSyncWritePerm() {
assertThrows(() => {
Deno.linkSync("oldbaddir", "newbaddir");
}, Deno.errors.PermissionDenied);
},
);
unitTest(
{ perms: { read: true, write: true } },
async function linkSuccess() {
const testDir = Deno.makeTempDirSync();
const oldData = "Hardlink";
const oldName = testDir + "/oldname";
const newName = testDir + "/newname";
Deno.writeFileSync(oldName, new TextEncoder().encode(oldData));
// Create the hard link.
await Deno.link(oldName, newName);
// We should expect reading the same content.
const newData = new TextDecoder().decode(Deno.readFileSync(newName));
assertEquals(oldData, newData);
// Writing to newname also affects oldname.
const newData2 = "Modified";
Deno.writeFileSync(newName, new TextEncoder().encode(newData2));
assertEquals(
newData2,
new TextDecoder().decode(Deno.readFileSync(oldName)),
);
// Writing to oldname also affects newname.
const newData3 = "ModifiedAgain";
Deno.writeFileSync(oldName, new TextEncoder().encode(newData3));
assertEquals(
newData3,
new TextDecoder().decode(Deno.readFileSync(newName)),
);
// Remove oldname. File still accessible through newname.
Deno.removeSync(oldName);
const newNameStat = Deno.statSync(newName);
assert(newNameStat.isFile);
assert(!newNameStat.isSymlink); // Not a symlink.
assertEquals(
newData3,
new TextDecoder().decode(Deno.readFileSync(newName)),
);
},
);
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