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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 /**
     29  * This test uses assert{True,False}(... == ...) instead of
     30  * assertEquals(..., ...) to not rely on the details of the
     31  * implementation of assertEquals.
     32  */
     33 
     34 assertTrue (void 0 == void 0, "void 0 == void 0");
     35 assertTrue (null == null,     "null == null");
     36 assertFalse(NaN == NaN,       "NaN == NaN");
     37 assertFalse(NaN == 0,         "NaN == 0");
     38 assertFalse(0 == NaN,         "0 == NaN");
     39 assertFalse(NaN == Infinity,  "NaN == Inf");
     40 assertFalse(Infinity == NaN,  "Inf == NaN");
     41 
     42 assertTrue(Number.MAX_VALUE == Number.MAX_VALUE, "MAX == MAX");
     43 assertTrue(Number.MIN_VALUE == Number.MIN_VALUE, "MIN == MIN");
     44 assertTrue(Infinity == Infinity,                 "Inf == Inf");
     45 assertTrue(-Infinity == -Infinity,               "-Inf == -Inf");
     46 
     47 assertTrue(0 == 0,   "0 == 0");
     48 assertTrue(0 == -0,  "0 == -0");
     49 assertTrue(-0 == 0,  "-0 == 0");
     50 assertTrue(-0 == -0, "-0 == -0");
     51 
     52 assertFalse(0.9 == 1,             "0.9 == 1");
     53 assertFalse(0.999999 == 1,        "0.999999 == 1");
     54 assertFalse(0.9999999999 == 1,    "0.9999999999 == 1");
     55 assertFalse(0.9999999999999 == 1, "0.9999999999999 == 1");
     56 
     57 assertTrue('hello' == 'hello', "'hello' == 'hello'");
     58 
     59 assertTrue (true == true,   "true == true");
     60 assertTrue (false == false, "false == false");
     61 assertFalse(true == false,  "true == false");
     62 assertFalse(false == true,  "false == true");
     63 
     64 assertFalse(new Wrapper(null) == new Wrapper(null),   "new Wrapper(null) == new Wrapper(null)");
     65 assertFalse(new Boolean(true) == new Boolean(true),   "new Boolean(true) == new Boolean(true)");
     66 assertFalse(new Boolean(false) == new Boolean(false), "new Boolean(false) == new Boolean(false)");
     67 
     68 (function () {
     69   var x = new Wrapper(null);
     70   var y = x, z = x;
     71   assertTrue(y == x);
     72 })();
     73 
     74 (function () {
     75   var x = new Boolean(true);
     76   var y = x, z = x;
     77   assertTrue(y == x);
     78 })();
     79 
     80 (function () {
     81   var x = new Boolean(false);
     82   var y = x, z = x;
     83   assertTrue(y == x);
     84 })();
     85 
     86 assertTrue(null == void 0,             "null == void 0");
     87 assertTrue(void 0 == null,             "void 0 == null");
     88 assertFalse(new Wrapper(null) == null, "new Wrapper(null) == null");
     89 assertFalse(null == new Wrapper(null), "null == new Wrapper(null)");
     90 
     91 assertTrue(1 == '1',       "1 == '1");
     92 assertTrue(255 == '0xff',  "255 == '0xff'");
     93 assertTrue(0 == '\r',      "0 == '\\r'");
     94 assertTrue(1e19 == '1e19', "1e19 == '1e19'");
     95 
     96 assertTrue(new Boolean(true) == true,   "new Boolean(true) == true");
     97 assertTrue(new Boolean(false) == false, "new Boolean(false) == false");
     98 assertTrue(true == new Boolean(true),   "true == new Boolean(true)");
     99 assertTrue(false == new Boolean(false), "false == new Boolean(false)");
    100 
    101 assertTrue(Boolean(true) == true,   "Boolean(true) == true");
    102 assertTrue(Boolean(false) == false, "Boolean(false) == false");
    103 assertTrue(true == Boolean(true),   "true == Boolean(true)");
    104 assertTrue(false == Boolean(false), "false == Boolean(false)");
    105 
    106 assertTrue(new Wrapper(true) == true,   "new Wrapper(true) == true");
    107 assertTrue(new Wrapper(false) == false, "new Wrapper(false) == false");
    108 assertTrue(true == new Wrapper(true),   "true = new Wrapper(true)");
    109 assertTrue(false == new Wrapper(false), "false = new Wrapper(false)");
    110 
    111 function Wrapper(value) {
    112   this.value = value;
    113   this.valueOf = function () { return this.value; };
    114 }
    115