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      1 // Copyright 2014 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 // Mimics assert module in node.
     29 
     30 function compose(message1, message2) {
     31   return message2 ? message1 + ': ' + message2 : message1
     32 }
     33 
     34 function fail(actual, expected, message, operator) {
     35   var e = Error(compose('FAIL', message) +
     36     ': (' + actual + ' ' + operator + ' ' + expected + ') should hold');
     37   fails.push(e);
     38   throw e;
     39 }
     40 
     41 function ok(value, message) {
     42   if (!value) {
     43     throw Error(compose('FAIL', + message) + ': value = ' + value);
     44   }
     45 }
     46 
     47 function equal(actual, expected, message) {
     48   if (!(expected == actual)) {
     49     fail(actual, expected, message, '==');
     50   }
     51 }
     52 
     53 function notEqual(actual, expected, message) {
     54   if (!(expected != actual)) {
     55     fail(actual, expected, message, '!=');
     56   }
     57 }
     58 
     59 function strictEqual(actual, expected, message) {
     60   if (!(expected === actual)) {
     61     fail(actual, expected, message, '===');
     62   }
     63 }
     64 
     65 function notStrictEqual(actual, expected, message) {
     66   if (!(expected !== actual)) {
     67     fail(actual, expected, message, '!==');
     68   }
     69 }
     70 
     71 function assert(value, message) {
     72   return ok(value, message);
     73 }
     74 
     75 function notImplemented() {
     76   throw Error('FAIL: This assertion function is not yet implemented.');
     77 }
     78 
     79 function clear() {
     80   this.fails = [];
     81 }
     82 
     83 assert.fail = fail;
     84 assert.ok = ok;
     85 assert.equal = equal;
     86 assert.notEqual = notEqual;
     87 assert.deepEqual = notImplemented;
     88 assert.notDeepEqual = notImplemented;
     89 assert.strictEqual = strictEqual;
     90 assert.notStrictEqual = notStrictEqual;
     91 assert.throws = notImplemented;
     92 assert.doesNotThrow = notImplemented;
     93 assert.ifError = notImplemented;
     94 
     95 assert.clear = clear;
     96 
     97 exports = assert;
     98