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 two = 2
  var three = 3
  
  // Precedence (right-to-left) tests
  assert(2 ** 3 ** 2 === 512)
  assert((2 ** 3) ** 2 === 64)
  assert(2 ** (3 ** 2) === 512)
  assert(two ** three ** two === 512)
  assert((two ** three) ** two === 64)
  assert(two ** (three ** two) === 512)
  
  assert(2 ** 2 * 3 ** 3 === 4 * 27)
  assert(two ** two * three ** three === 4 * 27)
  
  var a = 3
  assert((a **= 3) === 27)
  assert(a === 27)
  
  a = 2
  assert((a **= a **= 2) === 16)
  assert(a === 16)
  
  function assertThrows(src) {
    try {
      eval(src)
      assert(false)
    } catch (e) {
      assert(e instanceof SyntaxError)
    }
  }
  
  assertThrows("-2 ** 2")
  assertThrows("+a ** 2")
  assertThrows("!a ** 2")
  assertThrows("~a ** 2")
  assertThrows("void a ** 2")
  assertThrows("typeof a ** 2")
  assertThrows("delete a ** 2")
  assertThrows("!(-a) ** 2")
  
  assert((-2) ** 2 === 4)
  
  a = 3
  assert((-+-a) ** 3 === 27)
  
  a = 0
  assert((!a) ** 2 === 1)
  
  a = 0
  assert(isNaN((void a) ** 3))
  
  a = -4
  assert(++a ** 2 === 9)
  assert(a === -3)
  
  a = -2
  assert(a-- ** 2 === 4)
  assert(a === -3)
  