| // 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 |
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| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Test dictionary -> double elements -> dictionary elements round trip |
| |
| var foo = new Array(500000); |
| |
| function func(a) { |
| for (var i= 0; i < 100000; ++i ) { |
| a[i] = i+0.5; |
| } |
| } |
| |
| func(foo); |
| |
| for (var i= 0; i < 100000; i += 500 ) { |
| assertEquals(i+0.5, foo[i]); |
| } |
| |
| delete foo[5]; |
| // Don't use assertEquals for comparison to undefined due to |
| assertTrue(undefined === foo[5]); |
| assertTrue(undefined === foo[500000-1]); |
| assertTrue(undefined === foo[-1]); |
| assertEquals(500000, foo.length); |
| |
| // Cause the array to grow beyond it's JSArray length. This will double the |
| // size of the capacity and force the array into "slow" dictionary case. |
| foo[500001] = 50; |
| assertEquals(50, foo[500001]); |
| assertEquals(500002, foo.length); |
| assertTrue(undefined === foo[5]) |
| assertTrue(undefined === foo[500000-1]) |
| assertTrue(undefined === foo[-1]) |
| assertEquals(500002, foo.length); |
| |
| // Test dictionary -> double elements -> fast elements. |
| |
| var foo2 = new Array(500000); |
| func(foo2); |
| delete foo2[5]; |
| |
| // Convert back to fast elements and make sure the contents of the array are |
| // unchanged. |
| foo2[25] = new Object(); |
| for (var i= 0; i < 100000; i += 500 ) { |
| if (i != 25 && i != 5) { |
| assertEquals(i+0.5, foo2[i]); |
| } |
| } |
| assertTrue(undefined === foo2[5]) |
| assertTrue(undefined === foo2[500000-1]) |
| assertTrue(undefined === foo2[-1]) |
| assertEquals(500000, foo2.length); |