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56 lines
1.8 KiB
TypeScript
56 lines
1.8 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { unitTest, assertEquals, assert } from "./test_util.ts";
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unitTest(
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{ perms: { read: true, write: true } },
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function truncateSyncSuccess(): void {
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const filename = Deno.makeTempDirSync() + "/test_truncateSync.txt";
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Deno.writeFileSync(filename, new Uint8Array(5));
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Deno.truncateSync(filename, 20);
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assertEquals(Deno.readFileSync(filename).byteLength, 20);
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Deno.truncateSync(filename, 5);
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assertEquals(Deno.readFileSync(filename).byteLength, 5);
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Deno.truncateSync(filename, -5);
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assertEquals(Deno.readFileSync(filename).byteLength, 0);
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Deno.removeSync(filename);
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}
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);
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unitTest(
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{ perms: { read: true, write: true } },
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async function truncateSuccess(): Promise<void> {
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const filename = Deno.makeTempDirSync() + "/test_truncate.txt";
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await Deno.writeFile(filename, new Uint8Array(5));
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await Deno.truncate(filename, 20);
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assertEquals((await Deno.readFile(filename)).byteLength, 20);
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await Deno.truncate(filename, 5);
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assertEquals((await Deno.readFile(filename)).byteLength, 5);
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await Deno.truncate(filename, -5);
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assertEquals((await Deno.readFile(filename)).byteLength, 0);
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await Deno.remove(filename);
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}
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);
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unitTest({ perms: { write: false } }, function truncateSyncPerm(): void {
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let err;
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try {
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Deno.truncateSync("/test_truncateSyncPermission.txt");
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} catch (e) {
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err = e;
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}
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assert(err instanceof Deno.errors.PermissionDenied);
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assertEquals(err.name, "PermissionDenied");
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});
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unitTest({ perms: { write: false } }, async function truncatePerm(): Promise<
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void
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> {
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let err;
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try {
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await Deno.truncate("/test_truncatePermission.txt");
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} catch (e) {
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err = e;
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}
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assert(err instanceof Deno.errors.PermissionDenied);
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assertEquals(err.name, "PermissionDenied");
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});
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