Fix.

node_modules/define-properties/test/index.js

@@ -0,0 +1,125 @@
+'use strict';
+
+var define = require('../');
+var test = require('tape');
+var keys = require('object-keys');
+
+var arePropertyDescriptorsSupported = function () {
+	var obj = { a: 1 };
+	try {
+		Object.defineProperty(obj, 'x', { value: obj });
+		return obj.x === obj;
+	} catch (e) { /* this is IE 8. */
+		return false;
+	}
+};
+var descriptorsSupported = !!Object.defineProperty && arePropertyDescriptorsSupported();
+
+var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+
+test('defineProperties', function (dt) {
+	dt.test('with descriptor support', { skip: !descriptorsSupported }, function (t) {
+		var getDescriptor = function (value) {
+			return {
+				configurable: true,
+				enumerable: false,
+				value: value,
+				writable: true
+			};
+		};
+
+		var obj = {
+			a: 1,
+			b: 2,
+			c: 3
+		};
+		t.deepEqual(keys(obj), ['a', 'b', 'c'], 'all literal-set keys start enumerable');
+		define(obj, {
+			b: 3,
+			c: 4,
+			d: 5
+		});
+		t.deepEqual(obj, {
+			a: 1,
+			b: 2,
+			c: 3
+		}, 'existing properties were not overridden');
+		t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'new property "d" was added and is not enumerable');
+		t.deepEqual(['a', 'b', 'c'], keys(obj), 'new keys are not enumerable');
+
+		define(obj, {
+			a: 2,
+			b: 3,
+			c: 4
+		}, {
+			a: function () { return true; },
+			b: function () { return false; }
+		});
+		t.deepEqual(obj, {
+			b: 2,
+			c: 3
+		}, 'properties only overriden when predicate exists and returns true');
+		t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'd'), getDescriptor(5), 'existing property "d" remained and is not enumerable');
+		t.deepEqual(Object.getOwnPropertyDescriptor(obj, 'a'), getDescriptor(2), 'existing property "a" was overridden and is not enumerable');
+		t.deepEqual(['b', 'c'], keys(obj), 'overridden keys are not enumerable');
+
+		t.end();
+	});
+
+	dt.test('without descriptor support', { skip: descriptorsSupported }, function (t) {
+		var obj = {
+			a: 1,
+			b: 2,
+			c: 3
+		};
+		define(obj, {
+			b: 3,
+			c: 4,
+			d: 5
+		});
+		t.deepEqual(obj, {
+			a: 1,
+			b: 2,
+			c: 3,
+			d: 5
+		}, 'existing properties were not overridden, new properties were added');
+
+		define(obj, {
+			a: 2,
+			b: 3,
+			c: 4
+		}, {
+			a: function () { return true; },
+			b: function () { return false; }
+		});
+		t.deepEqual(obj, {
+			a: 2,
+			b: 2,
+			c: 3,
+			d: 5
+		}, 'properties only overriden when predicate exists and returns true');
+
+		t.end();
+	});
+
+	dt.end();
+});
+
+test('symbols', { skip: !hasSymbols }, function (t) {
+	var sym = Symbol('foo');
+	var obj = {};
+	var aValue = {};
+	var bValue = {};
+	var properties = { a: aValue };
+	properties[sym] = bValue;
+
+	define(obj, properties);
+
+	t.deepEqual(Object.keys(obj), [], 'object has no enumerable keys');
+	t.deepEqual(Object.getOwnPropertyNames(obj), ['a'], 'object has non-enumerable "a" key');
+	t.deepEqual(Object.getOwnPropertySymbols(obj), [sym], 'object has non-enumerable symbol key');
+	t.equal(obj.a, aValue, 'string keyed value is defined');
+	t.equal(obj[sym], bValue, 'symbol keyed value is defined');
+
+	t.end();
+});