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      1 // Copyright 2012 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 function rec1(a) { rec1(a+1); }
     29 function rec2(a) { rec3(a+1); }
     30 function rec3(a) { rec2(a+1); }
     31 
     32 // Test stack trace getter and setter.
     33 try {
     34   rec1(0);
     35 } catch (e) {
     36   assertTrue(e.stack.indexOf("rec1") > 0);
     37   e.stack = "123";
     38   assertEquals("123", e.stack);
     39 }
     40 
     41 // Test setter w/o calling the getter.
     42 try {
     43   rec2(0);
     44 } catch (e) {
     45   assertTrue(e.stack.indexOf("rec2") > 0);
     46   assertTrue(e.stack.indexOf("rec3") > 0);
     47   e.stack = "123";
     48   assertEquals("123", e.stack);
     49 }
     50 
     51 // Test getter to make sure setter does not affect the boilerplate.
     52 try {
     53   rec1(0);
     54 } catch (e) {
     55   assertTrue(e.stack.indexOf("rec1") > 0);
     56   assertInstanceof(e, RangeError);
     57 }
     58 
     59 
     60 // Check setting/getting stack property on the prototype chain.
     61 function testErrorPrototype(prototype) {
     62   var object = {};
     63   object.__proto__ = prototype;
     64   object.stack = "123";
     65   assertEquals("123", object.stack);
     66   assertTrue("123" != prototype.stack);
     67 }
     68 
     69 try {
     70   rec1(0);
     71 } catch (e) {
     72   e.stack;
     73   testErrorPrototype(e);
     74 }
     75 
     76 try {
     77   rec1(0);
     78 } catch (e) {
     79   testErrorPrototype(e);
     80 }
     81 
     82 try {
     83   throw new Error();
     84 } catch (e) {
     85   testErrorPrototype(e);
     86 }
     87 
     88 Error.stackTraceLimit = 3;
     89 try {
     90   rec1(0);
     91 } catch (e) {
     92   assertEquals(4, e.stack.split('\n').length);
     93 }
     94 
     95 Error.stackTraceLimit = 25.9;
     96 try {
     97   rec1(0);
     98 } catch (e) {
     99   assertEquals(26, e.stack.split('\n').length);
    100 }
    101 
    102 Error.stackTraceLimit = NaN;
    103 try {
    104   rec1(0);
    105 } catch (e) {
    106   assertEquals(1, e.stack.split('\n').length);
    107 }
    108 
    109 Error.stackTraceLimit = "not a number";
    110 try {
    111   rec1(0);
    112 } catch (e) {
    113   assertEquals(undefined, e.stack);
    114 }
    115 
    116 Error.stackTraceLimit = 3;
    117 Error = "";  // Overwrite Error in the global object.
    118 try {
    119   rec1(0);
    120 } catch (e) {
    121   assertEquals(4, e.stack.split('\n').length);
    122 }
    123