// Copyright 2018-2020 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(): void { 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(): void { 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(): void { 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(): void { assertThrows(() => { Deno.linkSync("oldbaddir", "newbaddir"); }, Deno.errors.PermissionDenied); }, ); unitTest( { perms: { read: true, write: false } }, function linkSyncWritePerm(): void { assertThrows(() => { Deno.linkSync("oldbaddir", "newbaddir"); }, Deno.errors.PermissionDenied); }, ); unitTest( { perms: { read: true, write: true } }, async function linkSuccess(): Promise<void> { 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)), ); }, );