Diffusion Ant (master) Code

ant/tests/test_child_process_stream_setencoding.cjs
e35c3ed2ab40master

test_child_process_stream_setencoding.cjs
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			const { spawn } = require('child_process');

			function assert(condition, message) {
			if (!condition) throw new Error(message);
			}

			const child = spawn(process.execPath, [
			'-e',
			'process.stdout.write("OUT"); process.stderr.write("ERR");'
			]);

			assert(child.stdout && typeof child.stdout.setEncoding === 'function', 'child.stdout.setEncoding should exist');
			assert(child.stderr && typeof child.stderr.setEncoding === 'function', 'child.stderr.setEncoding should exist');
			assert(child.stdout.readableEncoding === null, 'stdout readableEncoding should start as null');
			assert(child.stderr.readableEncoding === null, 'stderr readableEncoding should start as null');
			assert(child.stdout.setEncoding('utf8') === child.stdout, 'stdout.setEncoding should return stdout');
			assert(child.stderr.setEncoding('utf8') === child.stderr, 'stderr.setEncoding should return stderr');
			assert(child.stdout.readableEncoding === 'utf8', 'stdout readableEncoding should be utf8');
			assert(child.stderr.readableEncoding === 'utf8', 'stderr readableEncoding should be utf8');

			let stdout = '';
			let stderr = '';

			child.stdout.on('data', chunk => {
			assert(typeof chunk === 'string', 'stdout data should be a string after setEncoding');
			stdout += chunk;
			});

			child.stderr.on('data', chunk => {
			assert(typeof chunk === 'string', 'stderr data should be a string after setEncoding');
			stderr += chunk;
			});

			child.on('close', code => {
			assert(code === 0, `child exited ${code}`);
			assert(stdout === 'OUT', `expected stdout OUT, got ${JSON.stringify(stdout)}`);
			assert(stderr === 'ERR', `expected stderr ERR, got ${JSON.stringify(stderr)}`);
			console.log('child process stream setEncoding ok');
			});

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