1 files changed, 57 insertions, 0 deletions
diff --git a/node_modules/es-abstract/2016/SetIntegrityLevel.js b/node_modules/es-abstract/2016/SetIntegrityLevel.js
new file mode 100644
index 000000000..3d5c81d56
--- /dev/null
+++ b/node_modules/es-abstract/2016/SetIntegrityLevel.js
@@ -0,0 +1,57 @@
+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $SyntaxError = GetIntrinsic('%SyntaxError%');
+var $TypeError = GetIntrinsic('%TypeError%');
+var $preventExtensions = GetIntrinsic('%Object.preventExtensions%');
+var $gOPD = require('../helpers/getOwnPropertyDescriptor');
+var $gOPN = GetIntrinsic('%Object.getOwnPropertyNames%');
+
+var forEach = require('../helpers/forEach');
+
+var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
+var IsAccessorDescriptor = require('./IsAccessorDescriptor');
+var ToPropertyDescriptor = require('./ToPropertyDescriptor');
+var Type = require('./Type');
+
+// https://www.ecma-international.org/ecma-262/6.0/#sec-setintegritylevel
+
+module.exports = function SetIntegrityLevel(O, level) {
+	if (Type(O) !== 'Object') {
+		throw new $TypeError('Assertion failed: Type(O) is not Object');
+	}
+	if (level !== 'sealed' && level !== 'frozen') {
+		throw new $TypeError('Assertion failed: `level` must be `"sealed"` or `"frozen"`');
+	}
+	if (!$preventExtensions) {
+		throw new $SyntaxError('SetIntegrityLevel requires native `Object.preventExtensions` support');
+	}
+	var status = $preventExtensions(O);
+	if (!status) {
+		return false;
+	}
+	if (!$gOPN) {
+		throw new $SyntaxError('SetIntegrityLevel requires native `Object.getOwnPropertyNames` support');
+	}
+	var theKeys = $gOPN(O);
+	if (level === 'sealed') {
+		forEach(theKeys, function (k) {
+			DefinePropertyOrThrow(O, k, { configurable: false });
+		});
+	} else if (level === 'frozen') {
+		forEach(theKeys, function (k) {
+			var currentDesc = $gOPD(O, k);
+			if (typeof currentDesc !== 'undefined') {
+				var desc;
+				if (IsAccessorDescriptor(ToPropertyDescriptor(currentDesc))) {
+					desc = { configurable: false };
+				} else {
+					desc = { configurable: false, writable: false };
+				}
+				DefinePropertyOrThrow(O, k, desc);
+			}
+		});
+	}
+	return true;
+};