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      1 // Copyright 2008 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 var n = null;
     29 var u = void 0;
     30 assertTrue(null === null);
     31 assertTrue(null === n);
     32 assertTrue(n === null);
     33 assertTrue(n === n);
     34 assertFalse(null === void 0);
     35 assertFalse(void 0 === null);
     36 assertFalse(u === null);
     37 assertFalse(null === u);
     38 assertFalse(n === u);
     39 assertFalse(u === n);
     40 assertTrue(void 0 === void 0);
     41 assertTrue(u === u);
     42 assertTrue(u === void 0);
     43 assertTrue(void 0 === u);
     44 
     45 assertTrue('foo' === 'foo');
     46 assertFalse('bar' === 'foo');
     47 assertFalse('foo' === new String('foo'));
     48 assertFalse(new String('foo') === new String('foo'));
     49 var s = new String('foo');
     50 assertTrue(s === s);
     51 assertFalse(s === null);
     52 assertFalse(s === void 0);
     53 assertFalse('foo' === null);
     54 assertFalse('foo' === 7);
     55 assertFalse('foo' === true);
     56 assertFalse('foo' === void 0);
     57 assertFalse('foo' === {});
     58 
     59 assertFalse({} === {});
     60 var x = {};
     61 assertTrue(x === x);
     62 assertFalse(x === null);
     63 assertFalse(x === 7);
     64 assertFalse(x === true);
     65 assertFalse(x === void 0);
     66 assertFalse(x === {});
     67 
     68 assertTrue(true === true);
     69 assertTrue(false === false);
     70 assertFalse(false === true);
     71 assertFalse(true === false);
     72 assertFalse(true === new Boolean(true));
     73 assertFalse(true === new Boolean(false));
     74 assertFalse(false === new Boolean(true));
     75 assertFalse(false === new Boolean(false));
     76 assertFalse(true === 0);
     77 assertFalse(true === 1);
     78 
     79 assertTrue(0 === 0);
     80 assertTrue(-0 === -0);
     81 assertTrue(-0 === 0);
     82 assertTrue(0 === -0);
     83 assertFalse(0 === new Number(0));
     84 assertFalse(1 === new Number(1));
     85 assertTrue(4.2 === 4.2);
     86 assertTrue(4.2 === Number(4.2));
     87