test_dot_property_syntax.cjs
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test_dot_property_syntax.cjs
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	const { spawnSync } = require('child_process');
	const fs = require('fs');
	const os = require('os');
	const path = require('path');

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

	const keywordKeys = {
	default: 'default value',
	true: 'true value',
	null: 'null value',
	class: 'class value',
	};

	assert(keywordKeys.default === 'default value', 'dot access should allow default as property name');
	assert(keywordKeys.true === 'true value', 'dot access should allow true as property name');
	assert(keywordKeys.null === 'null value', 'dot access should allow null as property name');
	assert(keywordKeys.class === 'class value', 'dot access should allow class as property name');

	const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'ant-dot-property-syntax-'));

	function runInvalid(file, source) {
	const scriptPath = path.join(tmpDir, file);
	fs.writeFileSync(scriptPath, source);
	const result = spawnSync(process.execPath, [scriptPath], { encoding: 'utf8' });
	if (result.error) throw result.error;
	assert(result.status !== 0, `${file} should fail to parse`);
	assert(result.stderr.includes('SyntaxError'), `${file} should report SyntaxError\n${result.stderr}`);
	assert(result.stderr.includes("Unexpected token '&'"), `${file} should reject the punctuator after dot\n${result.stderr}`);
	assert(!result.stderr.includes('ReferenceError'), `${file} should not execute as a bitwise expression\n${result.stderr}`);
	}

	runInvalid(
	'invalid-dot-property.cjs',
	"const person = { '&weird property': 'YYCJS' };\nperson.&weird property;\n"
	);

	runInvalid(
	'invalid-optional-dot-property.cjs',
	"const person = { '&weird property': 'YYCJS' };\nperson?.&weird property;\n"
	);

	console.log('dot property syntax test passed');

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