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      1 // Copyright 2009 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Tests loading of properties across eval calls.
     29 
     30 var x = 1;
     31 function global_function() { return 'global'; }
     32 const const_uninitialized;
     33 const const_initialized = function() { return "const_global"; }
     34 
     35 // Test loading across an eval call that does not shadow variables.
     36 function testNoShadowing() {
     37   var y = 2;
     38   function local_function() { return 'local'; }
     39   const local_const_uninitialized;
     40   const local_const_initialized = function() { return "const_local"; }
     41   function f() {
     42     eval('1');
     43     assertEquals(1, x);
     44     try { typeof(asdf); } catch(e) { assertUnreachable(); }
     45     assertEquals(2, y);
     46     assertEquals('global', global_function());
     47     assertEquals('local', local_function());
     48     var exception = false;
     49     try {
     50       const_uninitialized();
     51     } catch(e) {
     52       exception = true;
     53     }
     54     assertTrue(exception);
     55     assertEquals('const_global', const_initialized());
     56     exception = false;
     57     try {
     58       local_const_uninitialized();
     59     } catch(e) {
     60       exception = true;
     61     }
     62     assertTrue(exception);
     63     assertEquals('const_local', local_const_initialized());
     64     function g() {
     65       assertEquals(1, x);
     66       try { typeof(asdf); } catch(e) { assertUnreachable(); }
     67       assertEquals(2, y);
     68       assertEquals('global', global_function());
     69       assertEquals('local', local_function());
     70       var exception = false;
     71       try {
     72         const_uninitialized();
     73       } catch(e) {
     74         exception = true;
     75       }
     76       assertTrue(exception);
     77       assertEquals('const_global', const_initialized());
     78       exception = false;
     79       try {
     80         local_const_uninitialized();
     81       } catch(e) {
     82         exception = true;
     83       }
     84       assertTrue(exception);
     85       assertEquals('const_local', local_const_initialized());
     86     }
     87     g();
     88   }
     89   f();
     90 }
     91 
     92 testNoShadowing();
     93 
     94 // Test loading across eval calls that do not shadow variables.
     95 function testNoShadowing2() {
     96   var y = 2;
     97   function local_function() { return 'local'; }
     98   eval('1');
     99   function f() {
    100     eval('1');
    101     assertEquals(1, x);
    102     assertEquals(2, y);
    103     assertEquals('global', global_function());
    104     assertEquals('local', local_function());
    105     function g() {
    106       assertEquals(1, x);
    107       assertEquals(2, y);
    108       assertEquals('global', global_function());
    109       assertEquals('local', local_function());
    110     }
    111     g();
    112   }
    113   f();
    114 }
    115 
    116 testNoShadowing2();
    117 
    118 // Test loading across an eval call that shadows variables.
    119 function testShadowing() {
    120   var y = 2;
    121   function local_function() { return 'local'; }
    122   function f() {
    123     eval('var x = 3; var y = 4;');
    124     assertEquals(3, x);
    125     assertEquals(4, y);
    126     eval('function local_function() { return "new_local"; }');
    127     eval('function global_function() { return "new_nonglobal"; }');
    128     assertEquals('new_nonglobal', global_function());
    129     assertEquals('new_local', local_function());
    130     function g() {
    131       assertEquals(3, x);
    132       assertEquals(4, y);
    133       assertEquals('new_nonglobal', global_function());
    134       assertEquals('new_local', local_function());
    135     }
    136     g();
    137   }
    138   f();
    139 }
    140 
    141 testShadowing();
    142