Diffusion Ant (type-hints-typescript) Code

ant/tests/test_fs_streams.cjs
899dad6b8a9etype-hints-typescript

test_fs_streams.cjs
View Options

			const fs = require('node:fs');
			const { Buffer } = require('node:buffer');
			const sourcePath = '/tmp/ant_fs_stream_seq_source.bin';
			const copyPath = '/tmp/ant_fs_stream_seq_copy.bin';
			const content = Buffer.alloc(70000);

			for (let i = 0; i < content.length; i++) {
			content[i] = i & 255;
			}

			function sameBuffer(left, right) {
			if (!left \|\| !right \|\| left.length !== right.length) return false;
			for (let i = 0; i < left.length; i++) {
			if (left[i] !== right[i]) return false;
			}
			return true;
			}

			try {
			fs.unlinkSync(sourcePath);
			} catch {}
			try {
			fs.unlinkSync(copyPath);
			} catch {}

			function fail(error) {
			console.error(error);
			process.exit(1);
			}

			const writer = fs.createWriteStream(sourcePath);
			if (!(writer instanceof fs.WriteStream)) throw new Error('createWriteStream() did not return fs.WriteStream');
			writer.on('error', fail);
			writer.on('finish', () => {
			const written = fs.readFileSync(sourcePath);
			if (!sameBuffer(written, content)) fail(new Error(`unexpected write content length: ${written.length}`));

			const reader = fs.createReadStream(sourcePath);
			if (!(reader instanceof fs.ReadStream)) fail(new Error('createReadStream() did not return fs.ReadStream'));

			const readBack = [];
			reader.on('error', fail);
			reader.on('data', chunk => {
			readBack.push(chunk);
			});
			reader.on('end', () => {
			if (!sameBuffer(Buffer.concat(readBack), content)) fail(new Error('unexpected read content'));

			const pipedReader = fs.createReadStream(sourcePath);
			const pipedWriter = fs.createWriteStream(copyPath);
			pipedReader.on('error', fail);
			pipedWriter.on('error', fail);
			pipedWriter.on('finish', () => {
			const copied = fs.readFileSync(copyPath);
			if (!sameBuffer(copied, content)) fail(new Error(`unexpected piped content length: ${copied.length}`));

			fs.unlinkSync(sourcePath);
			fs.unlinkSync(copyPath);
			console.log('fs stream test passed');
			});
			pipedReader.pipe(pipedWriter);
			});
			});

			writer.write(content.subarray(0, 32768));
			writer.end(content.subarray(32768));

Owner Packages

No Owners