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      1 // Copyright 2011 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 assertEquals(Boolean(void 0), false);
     29 assertEquals(Boolean(null), false);
     30 assertEquals(Boolean(false), false);
     31 assertEquals(Boolean(true), true);
     32 assertEquals(Boolean(0), false);
     33 assertEquals(Boolean(1), true);
     34 assertEquals(Boolean(assertEquals), true);
     35 assertEquals(Boolean(new Object()), true);
     36 assertTrue(new Boolean(false) !== false);
     37 assertTrue(new Boolean(false) == false);
     38 assertTrue(new Boolean(true) !== true);
     39 assertTrue(new Boolean(true) == true);
     40 
     41 assertEquals(true, !false);
     42 assertEquals(false, !true);
     43 assertEquals(true, !!true);
     44 assertEquals(false, !!false);
     45 
     46 assertEquals(true, true ? true : false);
     47 assertEquals(false, false ? true : false);
     48 
     49 assertEquals(false, true ? false : true);
     50 assertEquals(true, false ? false : true);
     51 
     52 
     53 assertEquals(true, true && true);
     54 assertEquals(false, true && false);
     55 assertEquals(false, false && true);
     56 assertEquals(false, false && false);
     57 
     58 // Regression.
     59 var t = 42;
     60 assertEquals(void 0, t.p);
     61 assertEquals(void 0, t.p && true);
     62 assertEquals(void 0, t.p && false);
     63 assertEquals(void 0, t.p && (t.p == 0));
     64 assertEquals(void 0, t.p && (t.p == null));
     65 assertEquals(void 0, t.p && (t.p == t.p));
     66 
     67 var o = new Object();
     68 o.p = 'foo';
     69 assertEquals('foo', o.p);
     70 assertEquals('foo', o.p || true);
     71 assertEquals('foo', o.p || false);
     72 assertEquals('foo', o.p || (o.p == 0));
     73 assertEquals('foo', o.p || (o.p == null));
     74 assertEquals('foo', o.p || (o.p == o.p));
     75 
     76 // JSToBoolean(x:string)
     77 function f(x) { return !!("" + x); }
     78 assertEquals(false, f(""));
     79 assertEquals(true, f("narf"));
     80 assertEquals(true, f(12345678));
     81 assertEquals(true, f(undefined));
     82