test/mjsunit/strict-mode.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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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);
}

// Incorrect 'use strict' directive.
function UseStrictEscape() {
  "use\\x20strict";
  with ({}) {};
}

// '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)

// 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'; }");

// Octal before "use strict"
assertThrows('\
  function strict() {\
    "octal\\032directive";\
    "use strict";\
  }', SyntaxError);