helpers.js
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helpers.js
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	const GREEN = '\x1b[32m';
	const RED = '\x1b[31m';
	const RESET = '\x1b[0m';

	let passed = 0;
	let failed = 0;
	let failures = [];

	function specHook() {
	return globalThis.__ANT_SPEC_HOOK__ \|\| null;
	}

	function specState() {
	const hook = specHook();
	if (hook && hook.current) return hook.current;
	return null;
	}

	function incPassed() {
	const s = specState();
	if (s) s.passed++;
	else passed++;
	}

	function incFailed(name) {
	const s = specState();
	if (s) {
	s.failed++;
	if (name) s.failures.push(`${RED}✗${RESET} ${name}`);
	} else {
	failed++;
	if (name) failures.push(`${RED}✗${RESET} ${name}`);
	}
	}

	export function test(name, actual, expected) {
	if (actual === expected) {
	console.log(`${GREEN}✓${RESET} ${name}`);
	incPassed();
	} else {
	console.log(`${RED}✗${RESET} ${name}`);
	console.log(` Expected: ${expected}`);
	console.log(` Actual: ${actual}`);
	incFailed(name);
	}
	}

	export function testApprox(name, actual, expected, epsilon = 1e-10) {
	const pass =
	(Number.isNaN(actual) && Number.isNaN(expected)) \|\|
	(!Number.isFinite(actual) && !Number.isFinite(expected) && actual === expected) \|\|
	Math.abs(actual - expected) < epsilon;
	if (pass) {
	console.log(`${GREEN}✓${RESET} ${name}`);
	incPassed();
	} else {
	console.log(`${RED}✗${RESET} ${name}`);
	console.log(` Expected: ${expected}`);
	console.log(` Actual: ${actual}`);
	incFailed(name);
	}
	}

	export function testThrows(name, fn) {
	try {
	fn();
	console.log(`${RED}✗${RESET} ${name} (expected to throw)`);
	incFailed(`${name} (expected to throw)`);
	} catch (e) {
	console.log(`${GREEN}✓${RESET} ${name}`);
	incPassed();
	}
	}

	export function testDeep(name, actual, expected) {
	const pass = JSON.stringify(actual) === JSON.stringify(expected);
	if (pass) {
	console.log(`${GREEN}✓${RESET} ${name}`);
	incPassed();
	} else {
	console.log(`${RED}✗${RESET} ${name}`);
	console.log(` Expected: ${JSON.stringify(expected)}`);
	console.log(` Actual: ${JSON.stringify(actual)}`);
	incFailed(name);
	}
	}

	export function summary() {
	const s = specState();
	const p = s ? s.passed : passed;
	const f = s ? s.failed : failed;

	console.log(`\nPassed: ${p}`);
	console.log(`Failed: ${f}`);

	const hook = specHook();
	if (hook && hook.current && typeof hook.onSummary === 'function') {
	hook.onSummary({
	passed: p,
	failed: f,
	failures: hook.current.failures.slice()
	});
	return;
	}

	if (f > 0) process.exit(1);
	}

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