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-rw-r--r--js/src/tests/non262/strict/shell.js65
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diff --git a/js/src/tests/non262/strict/shell.js b/js/src/tests/non262/strict/shell.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+(function(global) {
+
+ /*
+ * Return true if both of these return true:
+ * - LENIENT_PRED applied to CODE
+ * - STRICT_PRED applied to CODE with a use strict directive added to the front
+ *
+ * Run STRICT_PRED first, for testing code that affects the global environment
+ * in loose mode, but fails in strict mode.
+ */
+ global.testLenientAndStrict = function testLenientAndStrict(code, lenient_pred, strict_pred) {
+ return (strict_pred("'use strict'; " + code) &&
+ lenient_pred(code));
+ }
+
+ /*
+ * parsesSuccessfully(CODE) returns true if CODE parses as function
+ * code without an error.
+ */
+ global.parsesSuccessfully = function parsesSuccessfully(code) {
+ try {
+ Function(code);
+ return true;
+ } catch (exception) {
+ return false;
+ }
+ };
+
+ /*
+ * parseRaisesException(EXCEPTION)(CODE) returns true if parsing CODE
+ * as function code raises EXCEPTION.
+ */
+ global.parseRaisesException = function parseRaisesException(exception) {
+ return function (code) {
+ try {
+ Function(code);
+ return false;
+ } catch (actual) {
+ return exception.prototype.isPrototypeOf(actual);
+ }
+ };
+ };
+
+ /*
+ * returns(VALUE)(CODE) returns true if evaluating CODE (as eval code)
+ * completes normally (rather than throwing an exception), yielding a value
+ * strictly equal to VALUE.
+ */
+ global.returns = function returns(value) {
+ return function(code) {
+ try {
+ return eval(code) === value;
+ } catch (exception) {
+ return false;
+ }
+ }
+ }
+
+})(this);