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ant/examples/spec/fs_async.js
8755416ca476master

fs_async.js
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			import { test, summary } from './helpers.js';
			import fs from 'ant:fs';
			import path from 'ant:path';

			console.log('FS Async Tests\n');

			async function run() {
			const testDir = '/tmp/ant-spec-test-async';
			const testFile = path.join(testDir, 'test.txt');

			await fs.mkdir(testDir, { recursive: true });
			test('mkdir creates dir', await fs.exists(testDir), true);

			await fs.writeFile(testFile, 'hello world');
			test('writeFile creates file', await fs.exists(testFile), true);

			const content = await fs.readFile(testFile, 'utf8');
			test('readFile content', content, 'hello world');

			const stat = await fs.stat(testFile);
			test('stat isFile', stat.isFile(), true);
			test('stat isDirectory', stat.isDirectory(), false);
			test('stat size', stat.size > 0, true);

			const dirStat = await fs.stat(testDir);
			test('stat dir isDirectory', dirStat.isDirectory(), true);

			const files = await fs.readdir(testDir);
			test('readdir length', files.length >= 1, true);
			test('readdir includes test.txt', files.includes('test.txt'), true);

			await fs.unlink(testFile);
			test('unlink removes file', await fs.exists(testFile), false);

			// fd-based open/write/close
			const fdFile = path.join(testDir, 'fd_test.txt');
			const fd = await fs.open(fdFile, 'w');
			test('open returns fd', typeof fd, 'number');

			const written = await fs.write(fd, 'hello fd');
			test('write returns bytes written', written, 8);

			const buf = new Uint8Array([33]);
			const bufWritten = await fs.write(fd, buf);
			test('write buffer returns bytes written', bufWritten, 1);

			await fs.close(fd);

			const fdContent = fs.readFileSync(fdFile, 'utf8');
			test('write wrote correct data', fdContent, 'hello fd!');

			await fs.unlink(fdFile);

			// writev
			const wvFile = path.join(testDir, 'writev_test.txt');
			const wvFd = await fs.open(wvFile, 'w');
			const bufs = [new Uint8Array([65, 66]), new Uint8Array([67, 68])];
			const wvWritten = await fs.writev(wvFd, bufs);
			test('writev returns total bytes', wvWritten, 4);
			await fs.close(wvFd);

			const wvContent = fs.readFileSync(wvFile, 'utf8');
			test('writev wrote correct data', wvContent, 'ABCD');
			await fs.unlink(wvFile);

			await fs.rmdir(testDir);
			test('rmdir removes dir', await fs.exists(testDir), false);

			summary();
			}

			void run();

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