old_contents: 'use strict';
  
  var test = require('tape');
  var debug = require('object-inspect');
  var forEach = require('foreach');
  
  var v = require('./values');
  var getSymbolDescription = require('../../helpers/getSymbolDescription');
  var getInferredName = require('../../helpers/getInferredName');
  
  test('getSymbolDescription', function (t) {
  	t.test('no symbols', { skip: v.hasSymbols }, function (st) {
  		st['throws'](
  			getSymbolDescription,
  			SyntaxError,
  			'requires Symbol support'
  		);
  
  		st.end();
  	});
  
  	forEach(v.nonSymbolPrimitives.concat(v.objects), function (nonSymbol) {
  		t['throws'](
  			function () { getSymbolDescription(nonSymbol); },
  			v.hasSymbols ? TypeError : SyntaxError,
  			debug(nonSymbol) + ' is not a Symbol'
  		);
  	});
  
  	t.test('with symbols', { skip: !v.hasSymbols }, function (st) {
  		forEach(
  			[
  				[Symbol(), undefined],
  				[Symbol(undefined), undefined],
  				[Symbol(null), 'null'],
  				[Symbol.iterator, 'Symbol.iterator'],
  				[Symbol('foo'), 'foo']
  			],
  			function (pair) {
  				var sym = pair[0];
  				var desc = pair[1];
  				st.equal(getSymbolDescription(sym), desc, debug(sym) + ' yields ' + debug(desc));
  			}
  		);
  
  		st.test('only possible when inference is supported', { skip: !getInferredName }, function (s2t) {
  			s2t.equal(getSymbolDescription(Symbol('')), '', 'Symbol("") description is empty string');
  			s2t.end();
  		});
  
  		st.end();
  	});
  
  	t.end();
  });
  
new_contents: 'use strict';
  
  var test = require('tape');
  var debug = require('object-inspect');
  var forEach = require('foreach');
  var has = require('has');
  
  var v = require('./values');
  var getSymbolDescription = require('../../helpers/getSymbolDescription');
  var getInferredName = require('../../helpers/getInferredName');
  
  test('getSymbolDescription', function (t) {
  	t.test('no symbols', { skip: v.hasSymbols }, function (st) {
  		st['throws'](
  			getSymbolDescription,
  			SyntaxError,
  			'requires Symbol support'
  		);
  
  		st.end();
  	});
  
  	forEach(v.nonSymbolPrimitives.concat(v.objects), function (nonSymbol) {
  		t['throws'](
  			function () { getSymbolDescription(nonSymbol); },
  			v.hasSymbols ? TypeError : SyntaxError,
  			debug(nonSymbol) + ' is not a Symbol'
  		);
  	});
  
  	t.test('with symbols', { skip: !v.hasSymbols }, function (st) {
  		forEach(
  			[
  				[Symbol(), undefined],
  				[Symbol(undefined), undefined],
  				[Symbol(null), 'null'],
  				[Symbol.iterator, 'Symbol.iterator'],
  				[Symbol('foo'), 'foo']
  			],
  			function (pair) {
  				var sym = pair[0];
  				var desc = pair[1];
  				st.equal(getSymbolDescription(sym), desc, debug(sym) + ' description is ' + debug(desc));
  			}
  		);
  
  		st.test('only possible when inference or native `Symbol.prototype.description` is supported', {
  			skip: !getInferredName && !has(Symbol.prototype, 'description')
  		}, function (s2t) {
  			s2t.equal(getSymbolDescription(Symbol('')), '', 'Symbol("") description is ""');
  			s2t.end();
  		});
  
  		st.test('only possible when global symbols are supported', {
  			skip: !has(Symbol, 'for') || !has(Symbol, 'keyFor')
  		}, function (s2t) {
  			// eslint-disable-next-line no-restricted-properties
  			s2t.equal(getSymbolDescription(Symbol['for']('')), '', 'Symbol.for("") description is ""');
  			s2t.end();
  		});
  
  		st.end();
  	});
  
  	t.end();
  });
  
subject: add test cases