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v8/test/mjsunit/strict-mode.js

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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --turbo-deoptimization
function CheckStrictMode(code, exception) {
assertDoesNotThrow(code);
assertThrows("'use strict';\n" + code, exception);
assertThrows('"use strict";\n' + code, exception);
assertDoesNotThrow("\
function outer() {\
function inner() {\n"
+ code +
"\n}\
}");
assertThrows("\
function outer() {\
'use strict';\
function inner() {\n"
+ code +
"\n}\
}", exception);
}
function CheckFunctionConstructorStrictMode() {
var args = [];
for (var i = 0; i < arguments.length; i ++) {
args[i] = arguments[i];
}
// Create non-strict function. No exception.
args[arguments.length] = "";
assertDoesNotThrow(function() {
Function.apply(this, args);
});
// Create strict mode function. Exception expected.
args[arguments.length] = "'use strict';";
assertThrows(function() {
Function.apply(this, args);
}, SyntaxError);
}
// Incorrect 'use strict' directive.
(function UseStrictEscape() {
"use\\x20strict";
with ({}) {};
})();
// Incorrectly place 'use strict' directive.
assertThrows("function foo (x) 'use strict'; {}", SyntaxError);
// 'use strict' in non-directive position.
(function UseStrictNonDirective() {
void(0);
"use strict";
with ({}) {};
})();
// Multiple directives, including "use strict".
assertThrows('\
"directive 1";\
"another directive";\
"use strict";\
"directive after strict";\
"and one more";\
with({}) {}', SyntaxError);
// 'with' disallowed in strict mode.
CheckStrictMode("with({}) {}", SyntaxError);
// Function named 'eval'.
CheckStrictMode("function eval() {}", SyntaxError);
// Function named 'arguments'.
CheckStrictMode("function arguments() {}", SyntaxError);
// Function parameter named 'eval'.
CheckStrictMode("function foo(a, b, eval, c, d) {}", SyntaxError);
// Function parameter named 'arguments'.
CheckStrictMode("function foo(a, b, arguments, c, d) {}", SyntaxError);
// Property accessor parameter named 'eval'.
CheckStrictMode("var o = { set foo(eval) {} }", SyntaxError);
// Property accessor parameter named 'arguments'.
CheckStrictMode("var o = { set foo(arguments) {} }", SyntaxError);
// Duplicate function parameter name.
CheckStrictMode("function foo(a, b, c, d, b) {}", SyntaxError);
// Function constructor: eval parameter name.
CheckFunctionConstructorStrictMode("eval");
// Function constructor: arguments parameter name.
CheckFunctionConstructorStrictMode("arguments");
// Function constructor: duplicate parameter name.
CheckFunctionConstructorStrictMode("a", "b", "c", "b");
CheckFunctionConstructorStrictMode("a,b,c,b");
// catch(eval)
CheckStrictMode("try{}catch(eval){};", SyntaxError);
// catch(arguments)
CheckStrictMode("try{}catch(arguments){};", SyntaxError);
// var eval
CheckStrictMode("var eval;", SyntaxError);
// var arguments
CheckStrictMode("var arguments;", SyntaxError);
// Strict mode applies to the function in which the directive is used..
assertThrows('\
function foo(eval) {\
"use strict";\
}', SyntaxError);
// Strict mode doesn't affect the outer stop of strict code.
(function NotStrict(eval) {
function Strict() {
"use strict";
}
with ({}) {};
})();
// Octal literal
CheckStrictMode("var x = 012");
CheckStrictMode("012");
CheckStrictMode("'Hello octal\\032'");
CheckStrictMode("function octal() { return 012; }");
CheckStrictMode("function octal() { return '\\032'; }");
(function ValidEscape() {
"use strict";
var x = '\0';
var y = "\0";
})();
// Octal before "use strict"
assertThrows('\
function strict() {\
"octal\\032directive";\
"use strict";\
}', SyntaxError);
// Duplicate data properties.
CheckStrictMode("var x = { dupe : 1, nondupe: 3, dupe : 2 };", SyntaxError);
CheckStrictMode("var x = { '1234' : 1, '2345' : 2, '1234' : 3 };", SyntaxError);
CheckStrictMode("var x = { '1234' : 1, '2345' : 2, 1234 : 3 };", SyntaxError);
CheckStrictMode("var x = { 3.14 : 1, 2.71 : 2, 3.14 : 3 };", SyntaxError);
CheckStrictMode("var x = { 3.14 : 1, '3.14' : 2 };", SyntaxError);
CheckStrictMode("var x = { \
123: 1, \
123.00000000000000000000000000000000000000000000000000000000000000000001: 2 \
}", SyntaxError);
// Non-conflicting data properties.
(function StrictModeNonDuplicate() {
"use strict";
var x = { 123 : 1, "0123" : 2 };
var x = {
123: 1,
'123.00000000000000000000000000000000000000000000000000000000000000000001':
2
};
})();
// Two getters (non-strict)
assertThrows("var x = { get foo() { }, get foo() { } };", SyntaxError);
assertThrows("var x = { get foo(){}, get 'foo'(){}};", SyntaxError);
assertThrows("var x = { get 12(){}, get '12'(){}};", SyntaxError);
// Two setters (non-strict)
assertThrows("var x = { set foo(v) { }, set foo(v) { } };", SyntaxError);
assertThrows("var x = { set foo(v) { }, set 'foo'(v) { } };", SyntaxError);
assertThrows("var x = { set 13(v) { }, set '13'(v) { } };", SyntaxError);
// Setter and data (non-strict)
assertThrows("var x = { foo: 'data', set foo(v) { } };", SyntaxError);
assertThrows("var x = { set foo(v) { }, foo: 'data' };", SyntaxError);
assertThrows("var x = { foo: 'data', set 'foo'(v) { } };", SyntaxError);
assertThrows("var x = { set foo(v) { }, 'foo': 'data' };", SyntaxError);
assertThrows("var x = { 'foo': 'data', set foo(v) { } };", SyntaxError);
assertThrows("var x = { set 'foo'(v) { }, foo: 'data' };", SyntaxError);
assertThrows("var x = { 'foo': 'data', set 'foo'(v) { } };", SyntaxError);
assertThrows("var x = { set 'foo'(v) { }, 'foo': 'data' };", SyntaxError);
assertThrows("var x = { 12: 1, set '12'(v){}};", SyntaxError);
assertThrows("var x = { 12: 1, set 12(v){}};", SyntaxError);
assertThrows("var x = { '12': 1, set '12'(v){}};", SyntaxError);
assertThrows("var x = { '12': 1, set 12(v){}};", SyntaxError);
// Getter and data (non-strict)
assertThrows("var x = { foo: 'data', get foo() { } };", SyntaxError);
assertThrows("var x = { get foo() { }, foo: 'data' };", SyntaxError);
assertThrows("var x = { 'foo': 'data', get foo() { } };", SyntaxError);
assertThrows("var x = { get 'foo'() { }, 'foo': 'data' };", SyntaxError);
assertThrows("var x = { '12': 1, get '12'(){}};", SyntaxError);
assertThrows("var x = { '12': 1, get 12(){}};", SyntaxError);
// Assignment to eval or arguments
CheckStrictMode("function strict() { eval = undefined; }", SyntaxError);
CheckStrictMode("function strict() { arguments = undefined; }", SyntaxError);
CheckStrictMode("function strict() { print(eval = undefined); }", SyntaxError);
CheckStrictMode("function strict() { print(arguments = undefined); }",
SyntaxError);
CheckStrictMode("function strict() { var x = eval = undefined; }", SyntaxError);
CheckStrictMode("function strict() { var x = arguments = undefined; }",
SyntaxError);
// Compound assignment to eval or arguments
CheckStrictMode("function strict() { eval *= undefined; }", SyntaxError);
CheckStrictMode("function strict() { arguments /= undefined; }", SyntaxError);
CheckStrictMode("function strict() { print(eval %= undefined); }", SyntaxError);
CheckStrictMode("function strict() { print(arguments %= undefined); }",
SyntaxError);
CheckStrictMode("function strict() { var x = eval += undefined; }",
SyntaxError);
CheckStrictMode("function strict() { var x = arguments -= undefined; }",
SyntaxError);
CheckStrictMode("function strict() { eval <<= undefined; }", SyntaxError);
CheckStrictMode("function strict() { arguments >>= undefined; }", SyntaxError);
CheckStrictMode("function strict() { print(eval >>>= undefined); }",
SyntaxError);
CheckStrictMode("function strict() { print(arguments &= undefined); }",
SyntaxError);
CheckStrictMode("function strict() { var x = eval ^= undefined; }",
SyntaxError);
CheckStrictMode("function strict() { var x = arguments |= undefined; }",
SyntaxError);
// Postfix increment with eval or arguments
CheckStrictMode("function strict() { eval++; }", SyntaxError);
CheckStrictMode("function strict() { arguments++; }", SyntaxError);
CheckStrictMode("function strict() { print(eval++); }", SyntaxError);
CheckStrictMode("function strict() { print(arguments++); }", SyntaxError);
CheckStrictMode("function strict() { var x = eval++; }", SyntaxError);
CheckStrictMode("function strict() { var x = arguments++; }", SyntaxError);
// Postfix decrement with eval or arguments
CheckStrictMode("function strict() { eval--; }", SyntaxError);
CheckStrictMode("function strict() { arguments--; }", SyntaxError);
CheckStrictMode("function strict() { print(eval--); }", SyntaxError);
CheckStrictMode("function strict() { print(arguments--); }", SyntaxError);
CheckStrictMode("function strict() { var x = eval--; }", SyntaxError);
CheckStrictMode("function strict() { var x = arguments--; }", SyntaxError);
// Prefix increment with eval or arguments
CheckStrictMode("function strict() { ++eval; }", SyntaxError);
CheckStrictMode("function strict() { ++arguments; }", SyntaxError);
CheckStrictMode("function strict() { print(++eval); }", SyntaxError);
CheckStrictMode("function strict() { print(++arguments); }", SyntaxError);
CheckStrictMode("function strict() { var x = ++eval; }", SyntaxError);
CheckStrictMode("function strict() { var x = ++arguments; }", SyntaxError);
// Prefix decrement with eval or arguments
CheckStrictMode("function strict() { --eval; }", SyntaxError);
CheckStrictMode("function strict() { --arguments; }", SyntaxError);
CheckStrictMode("function strict() { print(--eval); }", SyntaxError);
CheckStrictMode("function strict() { print(--arguments); }", SyntaxError);
CheckStrictMode("function strict() { var x = --eval; }", SyntaxError);
CheckStrictMode("function strict() { var x = --arguments; }", SyntaxError);
// Use of const in strict mode is disallowed in anticipation of ES Harmony.
CheckStrictMode("const x = 0;", SyntaxError);
CheckStrictMode("for (const x = 0; false;) {}", SyntaxError);
CheckStrictMode("function strict() { const x = 0; }", SyntaxError);
// Strict mode only allows functions in SourceElements
CheckStrictMode("if (true) { function invalid() {} }", SyntaxError);
CheckStrictMode("for (;false;) { function invalid() {} }", SyntaxError);
CheckStrictMode("{ function invalid() {} }", SyntaxError);
CheckStrictMode("try { function invalid() {} } catch(e) {}", SyntaxError);
CheckStrictMode("try { } catch(e) { function invalid() {} }", SyntaxError);
CheckStrictMode("function outer() {{ function invalid() {} }}", SyntaxError);
// Delete of an unqualified identifier
CheckStrictMode("delete unqualified;", SyntaxError);
CheckStrictMode("function strict() { delete unqualified; }", SyntaxError);
CheckStrictMode("function function_name() { delete function_name; }",
SyntaxError);
CheckStrictMode("function strict(parameter) { delete parameter; }",
SyntaxError);
CheckStrictMode("function strict() { var variable; delete variable; }",
SyntaxError);
CheckStrictMode("var variable; delete variable;", SyntaxError);
(function TestStrictDelete() {
"use strict";
// "delete this" is allowed in strict mode and should work.
function strict_delete() { delete this; }
strict_delete();
})();
// Prefix unary operators other than delete, ++, -- are valid in strict mode
(function StrictModeUnaryOperators() {
"use strict";
var x = [void eval, typeof eval, +eval, -eval, ~eval, !eval];
var y = [void arguments, typeof arguments,
+arguments, -arguments, ~arguments, !arguments];
})();
// 7.6.1.2 Future Reserved Words in strict mode
var future_strict_reserved_words = [
"implements",
"interface",
"let",
"package",
"private",
"protected",
"public",
"static",
"yield" ];
function testFutureStrictReservedWord(word) {
// Simple use of each reserved word
CheckStrictMode("var " + word + " = 1;", SyntaxError);
CheckStrictMode("typeof (" + word + ");", SyntaxError);
// object literal properties
eval("var x = { " + word + " : 42 };");
eval("var x = { get " + word + " () {} };");
eval("var x = { set " + word + " (value) {} };");
eval("var x = { get " + word + " () { 'use strict'; } };");
eval("var x = { set " + word + " (value) { 'use strict'; } };");
// object literal with string literal property names
eval("var x = { '" + word + "' : 42 };");
eval("var x = { get '" + word + "' () { } };");
eval("var x = { set '" + word + "' (value) { } };");
eval("var x = { get '" + word + "' () { 'use strict'; } };");
eval("var x = { set '" + word + "' (value) { 'use strict'; } };");
// Function names and arguments, strict and non-strict contexts
CheckStrictMode("function " + word + " () {}", SyntaxError);
CheckStrictMode("function foo (" + word + ") {}", SyntaxError);
CheckStrictMode("function foo (" + word + ", " + word + ") {}", SyntaxError);
CheckStrictMode("function foo (a, " + word + ") {}", SyntaxError);
CheckStrictMode("function foo (" + word + ", a) {}", SyntaxError);
CheckStrictMode("function foo (a, " + word + ", b) {}", SyntaxError);
CheckStrictMode("var foo = function (" + word + ") {}", SyntaxError);
// Function names and arguments when the body is strict
assertThrows("function " + word + " () { 'use strict'; }", SyntaxError);
assertThrows("function foo (" + word + ", " + word + ") { 'use strict'; }",
SyntaxError);
assertThrows("function foo (a, " + word + ") { 'use strict'; }", SyntaxError);
assertThrows("function foo (" + word + ", a) { 'use strict'; }", SyntaxError);
assertThrows("function foo (a, " + word + ", b) { 'use strict'; }",
SyntaxError);
assertThrows("var foo = function (" + word + ") { 'use strict'; }",
SyntaxError);
// setter parameter when the body is strict
CheckStrictMode("var x = { set foo(" + word + ") {} };", SyntaxError);
assertThrows("var x = { set foo(" + word + ") { 'use strict'; } };",
SyntaxError);
}
for (var i = 0; i < future_strict_reserved_words.length; i++) {
testFutureStrictReservedWord(future_strict_reserved_words[i]);
}
function testAssignToUndefined(test, should_throw) {
try {
test();
} catch (e) {
assertTrue(should_throw, "strict mode");
assertInstanceof(e, ReferenceError, "strict mode");
return;
}
assertFalse(should_throw, "strict mode");
}
function repeat(n, f) {
for (var i = 0; i < n; i ++) { f(); }
}
function assignToUndefined() {
"use strict";
possibly_undefined_variable_for_strict_mode_test = "should throw?";
}
testAssignToUndefined(assignToUndefined, true);
testAssignToUndefined(assignToUndefined, true);
testAssignToUndefined(assignToUndefined, true);
possibly_undefined_variable_for_strict_mode_test = "value";
testAssignToUndefined(assignToUndefined, false);
testAssignToUndefined(assignToUndefined, false);
testAssignToUndefined(assignToUndefined, false);
delete possibly_undefined_variable_for_strict_mode_test;
testAssignToUndefined(assignToUndefined, true);
testAssignToUndefined(assignToUndefined, true);
testAssignToUndefined(assignToUndefined, true);
repeat(10, function() { testAssignToUndefined(assignToUndefined, true); });
possibly_undefined_variable_for_strict_mode_test = "value";
repeat(10, function() { testAssignToUndefined(assignToUndefined, false); });
delete possibly_undefined_variable_for_strict_mode_test;
repeat(10, function() { testAssignToUndefined(assignToUndefined, true); });
possibly_undefined_variable_for_strict_mode_test = undefined;
repeat(10, function() { testAssignToUndefined(assignToUndefined, false); });
function assignToUndefinedWithEval() {
"use strict";
possibly_undefined_variable_for_strict_mode_test_with_eval = "should throw?";
eval("");
}
testAssignToUndefined(assignToUndefinedWithEval, true);
testAssignToUndefined(assignToUndefinedWithEval, true);
testAssignToUndefined(assignToUndefinedWithEval, true);
possibly_undefined_variable_for_strict_mode_test_with_eval = "value";
testAssignToUndefined(assignToUndefinedWithEval, false);
testAssignToUndefined(assignToUndefinedWithEval, false);
testAssignToUndefined(assignToUndefinedWithEval, false);
delete possibly_undefined_variable_for_strict_mode_test_with_eval;
testAssignToUndefined(assignToUndefinedWithEval, true);
testAssignToUndefined(assignToUndefinedWithEval, true);
testAssignToUndefined(assignToUndefinedWithEval, true);
repeat(10, function() {
testAssignToUndefined(assignToUndefinedWithEval, true);
});
possibly_undefined_variable_for_strict_mode_test_with_eval = "value";
repeat(10, function() {
testAssignToUndefined(assignToUndefinedWithEval, false);
});
delete possibly_undefined_variable_for_strict_mode_test_with_eval;
repeat(10, function() {
testAssignToUndefined(assignToUndefinedWithEval, true);
});
possibly_undefined_variable_for_strict_mode_test_with_eval = undefined;
repeat(10, function() {
testAssignToUndefined(assignToUndefinedWithEval, false);
});
(function testDeleteNonConfigurable() {
function delete_property(o) {
"use strict";
delete o.property;
}
function delete_element(o, i) {
"use strict";
delete o[i];
}
var object = {};
Object.defineProperty(object, "property", { value: "property_value" });
Object.defineProperty(object, "1", { value: "one" });
Object.defineProperty(object, 7, { value: "seven" });
Object.defineProperty(object, 3.14, { value: "pi" });
assertThrows(function() { delete_property(object); }, TypeError);
assertEquals(object.property, "property_value");
assertThrows(function() { delete_element(object, "1"); }, TypeError);
assertThrows(function() { delete_element(object, 1); }, TypeError);
assertEquals(object[1], "one");
assertThrows(function() { delete_element(object, "7"); }, TypeError);
assertThrows(function() { delete_element(object, 7); }, TypeError);
assertEquals(object[7], "seven");
assertThrows(function() { delete_element(object, "3.14"); }, TypeError);
assertThrows(function() { delete_element(object, 3.14); }, TypeError);
assertEquals(object[3.14], "pi");
})();
// Not transforming this in Function.call and Function.apply.
(function testThisTransformCallApply() {
function non_strict() {
return this;
}
function strict() {
"use strict";
return this;
}
var global_object = (function() { return this; })();
var object = {};
// Non-strict call.
assertTrue(non_strict.call(null) === global_object);
assertTrue(non_strict.call(undefined) === global_object);
assertEquals(typeof non_strict.call(7), "object");
assertEquals(typeof non_strict.call("Hello"), "object");
assertTrue(non_strict.call(object) === object);
// Non-strict apply.
assertTrue(non_strict.apply(null) === global_object);
assertTrue(non_strict.apply(undefined) === global_object);
assertEquals(typeof non_strict.apply(7), "object");
assertEquals(typeof non_strict.apply("Hello"), "object");
assertTrue(non_strict.apply(object) === object);
// Strict call.
assertTrue(strict.call(null) === null);
assertTrue(strict.call(undefined) === undefined);
assertEquals(typeof strict.call(7), "number");
assertEquals(typeof strict.call("Hello"), "string");
assertTrue(strict.call(object) === object);
// Strict apply.
assertTrue(strict.apply(null) === null);
assertTrue(strict.apply(undefined) === undefined);
assertEquals(typeof strict.apply(7), "number");
assertEquals(typeof strict.apply("Hello"), "string");
assertTrue(strict.apply(object) === object);
})();
(function testThisTransform() {
try {
function strict() {
"use strict";
return typeof(this);
}
function nonstrict() {
return typeof(this);
}
// Concat to avoid symbol.
var strict_name = "str" + "ict";
var nonstrict_name = "non" + "str" + "ict";
var strict_number = 17;
var nonstrict_number = 19;
var strict_name_get = "str" + "ict" + "get";
var nonstrict_name_get = "non" + "str" + "ict" + "get"
var strict_number_get = 23;
var nonstrict_number_get = 29;
function install(t) {
t.prototype.strict = strict;
t.prototype.nonstrict = nonstrict;
t.prototype[strict_number] = strict;
t.prototype[nonstrict_number] = nonstrict;
Object.defineProperty(t.prototype, strict_name_get,
{ get: function() { return strict; },
configurable: true });
Object.defineProperty(t.prototype, nonstrict_name_get,
{ get: function() { return nonstrict; },
configurable: true });
Object.defineProperty(t.prototype, strict_number_get,
{ get: function() { return strict; },
configurable: true });
Object.defineProperty(t.prototype, nonstrict_number_get,
{ get: function() { return nonstrict; },
configurable: true });
}
function cleanup(t) {
delete t.prototype.strict;
delete t.prototype.nonstrict;
delete t.prototype[strict_number];
delete t.prototype[nonstrict_number];
delete t.prototype[strict_name_get];
delete t.prototype[nonstrict_name_get];
delete t.prototype[strict_number_get];
delete t.prototype[nonstrict_number_get];
}
// Set up fakes
install(String);
install(Number);
install(Boolean)
function callStrict(o) {
return o.strict();
}
function callNonStrict(o) {
return o.nonstrict();
}
function callKeyedStrict(o) {
return o[strict_name]();
}
function callKeyedNonStrict(o) {
return o[nonstrict_name]();
}
function callIndexedStrict(o) {
return o[strict_number]();
}
function callIndexedNonStrict(o) {
return o[nonstrict_number]();
}
function callStrictGet(o) {
return o.strictget();
}
function callNonStrictGet(o) {
return o.nonstrictget();
}
function callKeyedStrictGet(o) {
return o[strict_name_get]();
}
function callKeyedNonStrictGet(o) {
return o[nonstrict_name_get]();
}
function callIndexedStrictGet(o) {
return o[strict_number_get]();
}
function callIndexedNonStrictGet(o) {
return o[nonstrict_number_get]();
}
for (var i = 0; i < 10; i ++) {
assertEquals(("hello").strict(), "string");
assertEquals(("hello").nonstrict(), "object");
assertEquals(("hello")[strict_name](), "string");
assertEquals(("hello")[nonstrict_name](), "object");
assertEquals(("hello")[strict_number](), "string");
assertEquals(("hello")[nonstrict_number](), "object");
assertEquals((10 + i).strict(), "number");
assertEquals((10 + i).nonstrict(), "object");
assertEquals((10 + i)[strict_name](), "number");
assertEquals((10 + i)[nonstrict_name](), "object");
assertEquals((10 + i)[strict_number](), "number");
assertEquals((10 + i)[nonstrict_number](), "object");
assertEquals((true).strict(), "boolean");
assertEquals((true).nonstrict(), "object");
assertEquals((true)[strict_name](), "boolean");
assertEquals((true)[nonstrict_name](), "object");
assertEquals((true)[strict_number](), "boolean");
assertEquals((true)[nonstrict_number](), "object");
assertEquals((false).strict(), "boolean");
assertEquals((false).nonstrict(), "object");
assertEquals((false)[strict_name](), "boolean");
assertEquals((false)[nonstrict_name](), "object");
assertEquals((false)[strict_number](), "boolean");
assertEquals((false)[nonstrict_number](), "object");
assertEquals(callStrict("howdy"), "string");
assertEquals(callNonStrict("howdy"), "object");
assertEquals(callKeyedStrict("howdy"), "string");
assertEquals(callKeyedNonStrict("howdy"), "object");
assertEquals(callIndexedStrict("howdy"), "string");
assertEquals(callIndexedNonStrict("howdy"), "object");
assertEquals(callStrict(17 + i), "number");
assertEquals(callNonStrict(17 + i), "object");
assertEquals(callKeyedStrict(17 + i), "number");
assertEquals(callKeyedNonStrict(17 + i), "object");
assertEquals(callIndexedStrict(17 + i), "number");
assertEquals(callIndexedNonStrict(17 + i), "object");
assertEquals(callStrict(true), "boolean");
assertEquals(callNonStrict(true), "object");
assertEquals(callKeyedStrict(true), "boolean");
assertEquals(callKeyedNonStrict(true), "object");
assertEquals(callIndexedStrict(true), "boolean");
assertEquals(callIndexedNonStrict(true), "object");
assertEquals(callStrict(false), "boolean");
assertEquals(callNonStrict(false), "object");
assertEquals(callKeyedStrict(false), "boolean");
assertEquals(callKeyedNonStrict(false), "object");
assertEquals(callIndexedStrict(false), "boolean");
assertEquals(callIndexedNonStrict(false), "object");
// All of the above, with getters
assertEquals(("hello").strictget(), "string");
assertEquals(("hello").nonstrictget(), "object");
assertEquals(("hello")[strict_name_get](), "string");
assertEquals(("hello")[nonstrict_name_get](), "object");
assertEquals(("hello")[strict_number_get](), "string");
assertEquals(("hello")[nonstrict_number_get](), "object");
assertEquals((10 + i).strictget(), "number");
assertEquals((10 + i).nonstrictget(), "object");
assertEquals((10 + i)[strict_name_get](), "number");
assertEquals((10 + i)[nonstrict_name_get](), "object");
assertEquals((10 + i)[strict_number_get](), "number");
assertEquals((10 + i)[nonstrict_number_get](), "object");
assertEquals((true).strictget(), "boolean");
assertEquals((true).nonstrictget(), "object");
assertEquals((true)[strict_name_get](), "boolean");
assertEquals((true)[nonstrict_name_get](), "object");
assertEquals((true)[strict_number_get](), "boolean");
assertEquals((true)[nonstrict_number_get](), "object");
assertEquals((false).strictget(), "boolean");
assertEquals((false).nonstrictget(), "object");
assertEquals((false)[strict_name_get](), "boolean");
assertEquals((false)[nonstrict_name_get](), "object");
assertEquals((false)[strict_number_get](), "boolean");
assertEquals((false)[nonstrict_number_get](), "object");
assertEquals(callStrictGet("howdy"), "string");
assertEquals(callNonStrictGet("howdy"), "object");
assertEquals(callKeyedStrictGet("howdy"), "string");
assertEquals(callKeyedNonStrictGet("howdy"), "object");
assertEquals(callIndexedStrictGet("howdy"), "string");
assertEquals(callIndexedNonStrictGet("howdy"), "object");
assertEquals(callStrictGet(17 + i), "number");
assertEquals(callNonStrictGet(17 + i), "object");
assertEquals(callKeyedStrictGet(17 + i), "number");
assertEquals(callKeyedNonStrictGet(17 + i), "object");
assertEquals(callIndexedStrictGet(17 + i), "number");
assertEquals(callIndexedNonStrictGet(17 + i), "object");
assertEquals(callStrictGet(true), "boolean");
assertEquals(callNonStrictGet(true), "object");
assertEquals(callKeyedStrictGet(true), "boolean");
assertEquals(callKeyedNonStrictGet(true), "object");
assertEquals(callIndexedStrictGet(true), "boolean");
assertEquals(callIndexedNonStrictGet(true), "object");
assertEquals(callStrictGet(false), "boolean");
assertEquals(callNonStrictGet(false), "object");
assertEquals(callKeyedStrictGet(false), "boolean");
assertEquals(callKeyedNonStrictGet(false), "object");
assertEquals(callIndexedStrictGet(false), "boolean");
assertEquals(callIndexedNonStrictGet(false), "object");
}
} finally {
// Cleanup
cleanup(String);
cleanup(Number);
cleanup(Boolean);
}
})();
(function ObjectEnvironment() {
var o = {};
Object.defineProperty(o, "foo", { value: "FOO", writable: false });
assertThrows(
function () {
with (o) {
(function() {
"use strict";
foo = "Hello";
})();
}
},
TypeError);
})();
(function TestSetPropertyWithoutSetter() {
var o = { get foo() { return "Yey"; } };
assertThrows(
function broken() {
"use strict";
o.foo = (0xBADBAD00 >> 1);
},
TypeError);
})();
(function TestSetPropertyNonConfigurable() {
var frozen = Object.freeze({});
var sealed = Object.seal({});
function strict(o) {
"use strict";
o.property = "value";
}
assertThrows(function() { strict(frozen); }, TypeError);
assertThrows(function() { strict(sealed); }, TypeError);
})();
(function TestAssignmentToReadOnlyProperty() {
"use strict";
var o = {};
Object.defineProperty(o, "property", { value: 7 });
assertThrows(function() { o.property = "new value"; }, TypeError);
assertThrows(function() { o.property += 10; }, TypeError);
assertThrows(function() { o.property -= 10; }, TypeError);
assertThrows(function() { o.property *= 10; }, TypeError);
assertThrows(function() { o.property /= 10; }, TypeError);
assertThrows(function() { o.property++; }, TypeError);
assertThrows(function() { o.property--; }, TypeError);
assertThrows(function() { ++o.property; }, TypeError);
assertThrows(function() { --o.property; }, TypeError);
var name = "prop" + "erty"; // to avoid symbol path.
assertThrows(function() { o[name] = "new value"; }, TypeError);
assertThrows(function() { o[name] += 10; }, TypeError);
assertThrows(function() { o[name] -= 10; }, TypeError);
assertThrows(function() { o[name] *= 10; }, TypeError);
assertThrows(function() { o[name] /= 10; }, TypeError);
assertThrows(function() { o[name]++; }, TypeError);
assertThrows(function() { o[name]--; }, TypeError);
assertThrows(function() { ++o[name]; }, TypeError);
assertThrows(function() { --o[name]; }, TypeError);
assertEquals(o.property, 7);
})();
(function TestAssignmentToReadOnlyLoop() {
var name = "prop" + "erty"; // to avoid symbol path.
var o = {};
Object.defineProperty(o, "property", { value: 7 });
function strict(o, name) {
"use strict";
o[name] = "new value";
}
for (var i = 0; i < 10; i ++) {
var exception = false;
try {
strict(o, name);
} catch(e) {
exception = true;
assertInstanceof(e, TypeError);
}
assertTrue(exception);
}
})();
// Specialized KeyedStoreIC experiencing miss.
(function testKeyedStoreICStrict() {
var o = [9,8,7,6,5,4,3,2,1];
function test(o, i, v) {
"use strict";
o[i] = v;
}
for (var i = 0; i < 10; i ++) {
test(o, 5, 17); // start specialized for smi indices
assertEquals(o[5], 17);
test(o, "a", 19);
assertEquals(o["a"], 19);
test(o, "5", 29);
assertEquals(o[5], 29);
test(o, 100000, 31);
assertEquals(o[100000], 31);
}
})();
(function TestSetElementWithoutSetter() {
"use strict";
var o = { };
Object.defineProperty(o, 0, { get : function() { } });
var zero_smi = 0;
var zero_number = new Number(0);
var zero_symbol = "0";
var zero_string = "-0-".substring(1,2);
assertThrows(function() { o[zero_smi] = "new value"; }, TypeError);
assertThrows(function() { o[zero_number] = "new value"; }, TypeError);
assertThrows(function() { o[zero_symbol] = "new value"; }, TypeError);
assertThrows(function() { o[zero_string] = "new value"; }, TypeError);
})();
(function TestSetElementNonConfigurable() {
"use strict";
var frozen = Object.freeze({});
var sealed = Object.seal({});
var zero_number = 0;
var zero_symbol = "0";
var zero_string = "-0-".substring(1,2);
assertThrows(function() { frozen[zero_number] = "value"; }, TypeError);
assertThrows(function() { sealed[zero_number] = "value"; }, TypeError);
assertThrows(function() { frozen[zero_symbol] = "value"; }, TypeError);
assertThrows(function() { sealed[zero_symbol] = "value"; }, TypeError);
assertThrows(function() { frozen[zero_string] = "value"; }, TypeError);
assertThrows(function() { sealed[zero_string] = "value"; }, TypeError);
})();
(function TestAssignmentToReadOnlyElement() {
"use strict";
var o = {};
Object.defineProperty(o, 7, { value: 17 });
var seven_smi = 7;
var seven_number = new Number(7);
var seven_symbol = "7";
var seven_string = "-7-".substring(1,2);
// Index with number.
assertThrows(function() { o[seven_smi] = "value"; }, TypeError);
assertThrows(function() { o[seven_smi] += 10; }, TypeError);
assertThrows(function() { o[seven_smi] -= 10; }, TypeError);
assertThrows(function() { o[seven_smi] *= 10; }, TypeError);
assertThrows(function() { o[seven_smi] /= 10; }, TypeError);
assertThrows(function() { o[seven_smi]++; }, TypeError);
assertThrows(function() { o[seven_smi]--; }, TypeError);
assertThrows(function() { ++o[seven_smi]; }, TypeError);
assertThrows(function() { --o[seven_smi]; }, TypeError);
assertThrows(function() { o[seven_number] = "value"; }, TypeError);
assertThrows(function() { o[seven_number] += 10; }, TypeError);
assertThrows(function() { o[seven_number] -= 10; }, TypeError);
assertThrows(function() { o[seven_number] *= 10; }, TypeError);
assertThrows(function() { o[seven_number] /= 10; }, TypeError);
assertThrows(function() { o[seven_number]++; }, TypeError);
assertThrows(function() { o[seven_number]--; }, TypeError);
assertThrows(function() { ++o[seven_number]; }, TypeError);
assertThrows(function() { --o[seven_number]; }, TypeError);
assertThrows(function() { o[seven_symbol] = "value"; }, TypeError);
assertThrows(function() { o[seven_symbol] += 10; }, TypeError);
assertThrows(function() { o[seven_symbol] -= 10; }, TypeError);
assertThrows(function() { o[seven_symbol] *= 10; }, TypeError);
assertThrows(function() { o[seven_symbol] /= 10; }, TypeError);
assertThrows(function() { o[seven_symbol]++; }, TypeError);
assertThrows(function() { o[seven_symbol]--; }, TypeError);
assertThrows(function() { ++o[seven_symbol]; }, TypeError);
assertThrows(function() { --o[seven_symbol]; }, TypeError);
assertThrows(function() { o[seven_string] = "value"; }, TypeError);
assertThrows(function() { o[seven_string] += 10; }, TypeError);
assertThrows(function() { o[seven_string] -= 10; }, TypeError);
assertThrows(function() { o[seven_string] *= 10; }, TypeError);
assertThrows(function() { o[seven_string] /= 10; }, TypeError);
assertThrows(function() { o[seven_string]++; }, TypeError);
assertThrows(function() { o[seven_string]--; }, TypeError);
assertThrows(function() { ++o[seven_string]; }, TypeError);
assertThrows(function() { --o[seven_string]; }, TypeError);
assertEquals(o[seven_number], 17);
assertEquals(o[seven_symbol], 17);
assertEquals(o[seven_string], 17);
})();
(function TestAssignmentToReadOnlyLoop() {
"use strict";
var o = {};
Object.defineProperty(o, 7, { value: 17 });
var seven_smi = 7;
var seven_number = new Number(7);
var seven_symbol = "7";
var seven_string = "-7-".substring(1,2);
for (var i = 0; i < 10; i ++) {
assertThrows(function() { o[seven_smi] = "value" }, TypeError);
assertThrows(function() { o[seven_number] = "value" }, TypeError);
assertThrows(function() { o[seven_symbol] = "value" }, TypeError);
assertThrows(function() { o[seven_string] = "value" }, TypeError);
}
assertEquals(o[7], 17);
})();
(function TestAssignmentToStringLength() {
"use strict";
var str_val = "string";
var str_obj = new String(str_val);
var str_cat = str_val + str_val + str_obj;
assertThrows(function() { str_val.length = 1; }, TypeError);
assertThrows(function() { str_obj.length = 1; }, TypeError);
assertThrows(function() { str_cat.length = 1; }, TypeError);
})();
(function TestArgumentsAliasing() {
function strict(a, b) {
"use strict";
a = "c";
b = "d";
return [a, b, arguments[0], arguments[1]];
}
function nonstrict(a, b) {
a = "c";
b = "d";
return [a, b, arguments[0], arguments[1]];
}
assertEquals(["c", "d", "a", "b"], strict("a", "b"));
assertEquals(["c", "d", "c", "d"], nonstrict("a", "b"));
})();
function CheckPillDescriptor(func, name) {
function CheckPill(pill) {
assertEquals("function", typeof pill);
assertInstanceof(pill, Function);
pill.property = "value";
assertEquals(pill.value, undefined);
assertThrows(function() { 'use strict'; pill.property = "value"; },
TypeError);
assertThrows(pill, TypeError);
assertEquals(pill.prototype, (function(){}).prototype);
var d = Object.getOwnPropertyDescriptor(pill, "prototype");
assertFalse(d.writable);
assertFalse(d.configurable);
assertFalse(d.enumerable);
}
var descriptor = Object.getOwnPropertyDescriptor(func, name);
CheckPill(descriptor.get)
CheckPill(descriptor.set);
assertFalse(descriptor.enumerable);
assertFalse(descriptor.configurable);
}
(function TestStrictFunctionPills() {
function strict() {
"use strict";
}
assertThrows(function() { strict.caller; }, TypeError);
assertThrows(function() { strict.arguments; }, TypeError);
assertThrows(function() { strict.caller = 42; }, TypeError);
assertThrows(function() { strict.arguments = 42; }, TypeError);
var another = new Function("'use strict'");
assertThrows(function() { another.caller; }, TypeError);
assertThrows(function() { another.arguments; }, TypeError);
assertThrows(function() { another.caller = 42; }, TypeError);
assertThrows(function() { another.arguments = 42; }, TypeError);
var third = (function() { "use strict"; return function() {}; })();
assertThrows(function() { third.caller; }, TypeError);
assertThrows(function() { third.arguments; }, TypeError);
assertThrows(function() { third.caller = 42; }, TypeError);
assertThrows(function() { third.arguments = 42; }, TypeError);
CheckPillDescriptor(strict, "caller");
CheckPillDescriptor(strict, "arguments");
CheckPillDescriptor(another, "caller");
CheckPillDescriptor(another, "arguments");
CheckPillDescriptor(third, "caller");
CheckPillDescriptor(third, "arguments");
})();
(function TestStrictFunctionWritablePrototype() {
"use strict";
function TheClass() {
}
assertThrows(function() { TheClass.caller; }, TypeError);
assertThrows(function() { TheClass.arguments; }, TypeError);
// Strict functions must have writable prototype.
TheClass.prototype = {
func: function() { return "func_value"; },
get accessor() { return "accessor_value"; },
property: "property_value",
};
var o = new TheClass();
assertEquals(o.func(), "func_value");
assertEquals(o.accessor, "accessor_value");
assertEquals(o.property, "property_value");
})();
(function TestStrictArgumentPills() {
function strict() {
"use strict";
return arguments;
}
var args = strict();
CheckPillDescriptor(args, "caller");
CheckPillDescriptor(args, "callee");
args = strict(17, "value", strict);
assertEquals(17, args[0])
assertEquals("value", args[1])
assertEquals(strict, args[2]);
CheckPillDescriptor(args, "caller");
CheckPillDescriptor(args, "callee");
function outer() {
"use strict";
function inner() {
return arguments;
}
return inner;
}
var args = outer()();
CheckPillDescriptor(args, "caller");
CheckPillDescriptor(args, "callee");
args = outer()(17, "value", strict);
assertEquals(17, args[0])
assertEquals("value", args[1])
assertEquals(strict, args[2]);
CheckPillDescriptor(args, "caller");
CheckPillDescriptor(args, "callee");
})();
(function TestNonStrictFunctionCallerPillSimple() {
function return_my_caller() {
return return_my_caller.caller;
}
function strict() {
"use strict";
return return_my_caller();
}
assertSame(null, strict());
function non_strict() {
return return_my_caller();
}
assertSame(non_strict(), non_strict);
})();
(function TestNonStrictFunctionCallerPill() {
function strict(n) {
"use strict";
return non_strict(n);
}
function recurse(n, then) {
if (n > 0) {
return recurse(n - 1, then);
} else {
return then();
}
}
function non_strict(n) {
return recurse(n, function() { return non_strict.caller; });
}
function test(n) {
return recurse(n, function() { return strict(n); });
}
for (var i = 0; i < 10; i ++) {
assertSame(null, test(i));
}
})();
(function TestNonStrictFunctionCallerDescriptorPill() {
function strict(n) {
"use strict";
return non_strict(n);
}
function recurse(n, then) {
if (n > 0) {
return recurse(n - 1, then);
} else {
return then();
}
}
function non_strict(n) {
return recurse(n, function() {
return Object.getOwnPropertyDescriptor(non_strict, "caller").value;
});
}
function test(n) {
return recurse(n, function() { return strict(n); });
}
for (var i = 0; i < 10; i ++) {
assertSame(null, test(i));
}
})();
(function TestStrictModeEval() {
"use strict";
eval("var eval_local = 10;");
assertThrows(function() { return eval_local; }, ReferenceError);
})();
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