text: // Copyright JS Foundation and other contributors, http://js.foundation
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  var a = 21;
  var b = 10;
  var c;
  
  c = a + b;
  assert(c == 31);
  
  c = a - b;
  assert(c == 11);
  
  c = a * b;
  assert(c == 210);
  
  c = a / b;
  assert(c >= 2.1 - 0.000001 && c <= 2.1 + 0.000001);
  
  c = a % b;
  assert(c == 1);
  
  c = a++;
  assert(c == 21);
  
  c = a--;
  assert(c == 22);
  
  var o = { p : 1 };
  
  assert (++o.p === 2);
  assert (o.p === 2);
  assert (--o.p === 1);
  assert (o.p === 1);
  
  try {
    eval ('++ ++ a');
    assert (false);
  }
  catch (e) {
    assert (e instanceof ReferenceError);
  }
  
  assert (0.1 + 0.2 != 0.3);
  