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      1 // Copyright 2013 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,
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     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 // Test bitwise operations with booleans.
     29 
     30 var t = 1;
     31 
     32 function testFalseLeftHandSide() {
     33   var b;
     34   if (t) b = false;
     35   assertEquals(b | 1, 1);
     36   assertEquals(b & 1, 0);
     37   assertEquals(b ^ 1, 1);
     38   assertEquals(b << 1, 0);
     39   assertEquals(b >> 1, 0);
     40   assertEquals(b >>> 1, 0);
     41 }
     42 
     43 function testFalseRightHandSide() {
     44   if (t) b = false;
     45   assertEquals(1 |   b, 1);
     46   assertEquals(1 &   b, 0);
     47   assertEquals(1 ^   b, 1);
     48   assertEquals(1 <<  b, 1);
     49   assertEquals(1 >>  b, 1);
     50   assertEquals(1 >>> b, 1);
     51 }
     52 
     53 function testTrueLeftHandSide() {
     54   if (t) b = true;
     55   assertEquals(b | 1, 1);
     56   assertEquals(b & 1, 1);
     57   assertEquals(b ^ 1, 0);
     58   assertEquals(b << 1, 2);
     59   assertEquals(b >> 1, 0);
     60   assertEquals(b >>> 1, 0);
     61 }
     62 
     63 function testTrueRightHandSide() {
     64   if (t) b = true;
     65   assertEquals(1 |   b, 1);
     66   assertEquals(1 &   b, 1);
     67   assertEquals(1 ^   b, 0);
     68   assertEquals(1 <<  b, 2);
     69   assertEquals(1 >>  b, 0);
     70   assertEquals(1 >>> b, 0);
     71 }
     72 
     73 function testBothSides() {
     74   if (t) a = true;
     75   if (t) b = false;
     76   assertEquals(a |   b, 1);
     77   assertEquals(a &   b, 0);
     78   assertEquals(a ^   b, 1);
     79   assertEquals(a <<  b, 1);
     80   assertEquals(a >>  b, 1);
     81   assertEquals(a >>> b, 1);
     82 }
     83 
     84 
     85 testFalseLeftHandSide();
     86 testFalseRightHandSide();
     87 testTrueLeftHandSide();
     88 testTrueRightHandSide();
     89 testFalseLeftHandSide();
     90 testFalseRightHandSide();
     91 testTrueLeftHandSide();
     92 testTrueRightHandSide();
     93 testBothSides();
     94 testBothSides();
     95