import { assertEquals, assertThrows, fail } from "../../testing/asserts.ts";import { ftruncate, ftruncateSync } from "./_fs_ftruncate.ts";
Deno.test({ name: "ASYNC: no callback function results in Error", fn() { assertThrows( () => { 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); } },});