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Code Issues Packages 1 Wiki Activity

improve truncate tests (#6251)

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Casper Beyer 2020-06-12 13:40:06 +00:00 committed by GitHub
parent c073f552d9
commit b34f468943
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1 changed files with 8 additions and 32 deletions
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40
cli/tests/unit/truncate_test.ts
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@ -1,36 +1,17 @@
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { unitTest, assertEquals, assert } from "./test_util.ts";
function readDataSync(name: string): string {
const data = Deno.readFileSync(name);
const decoder = new TextDecoder("utf-8");
const text = decoder.decode(data);
return text;
}
async function readData(name: string): Promise<string> {
const data = await Deno.readFile(name);
const decoder = new TextDecoder("utf-8");
const text = decoder.decode(data);
return text;
}
unitTest(
{ perms: { read: true, write: true } },
function truncateSyncSuccess(): void {
const enc = new TextEncoder();
const d = enc.encode("Hello");
const filename = Deno.makeTempDirSync() + "/test_truncateSync.txt";
Deno.writeFileSync(filename, d);
Deno.writeFileSync(filename, new Uint8Array(5));
Deno.truncateSync(filename, 20);
let data = readDataSync(filename);
assertEquals(data.length, 20);
assertEquals(Deno.readFileSync(filename).byteLength, 20);
Deno.truncateSync(filename, 5);
data = readDataSync(filename);
assertEquals(data.length, 5);
assertEquals(Deno.readFileSync(filename).byteLength, 5);
Deno.truncateSync(filename, -5);
data = readDataSync(filename);
assertEquals(data.length, 0);
assertEquals(Deno.readFileSync(filename).byteLength, 0);
Deno.removeSync(filename);
}
);
@ -38,19 +19,14 @@ unitTest(
unitTest(
{ perms: { read: true, write: true } },
async function truncateSuccess(): Promise<void> {
const enc = new TextEncoder();
const d = enc.encode("Hello");
const filename = Deno.makeTempDirSync() + "/test_truncate.txt";
await Deno.writeFile(filename, d);
await Deno.writeFile(filename, new Uint8Array(5));
await Deno.truncate(filename, 20);
let data = await readData(filename);
assertEquals(data.length, 20);
assertEquals((await Deno.readFile(filename)).byteLength, 20);
await Deno.truncate(filename, 5);
data = await readData(filename);
assertEquals(data.length, 5);
assertEquals((await Deno.readFile(filename)).byteLength, 5);
await Deno.truncate(filename, -5);
data = await readData(filename);
assertEquals(data.length, 0);
assertEquals((await Deno.readFile(filename)).byteLength, 0);
await Deno.remove(filename);
}
);