text: // Copyright (C) 2017 Josh Wolfe. All rights reserved.
  // This code is governed by the BSD license found in the LICENSE file.
  /*---
  description: left-shift operator ToNumeric with BigInt operands
  esid: sec-left-shift-operator-runtime-semantics-evaluation
  features: [BigInt, Symbol.toPrimitive, computed-property-names]
  ---*/
  assert.sameValue(Object(2n) << 1n, 4n, 'The result of (Object(2n) << 1n) is 4n');
  assert.sameValue(1n << Object(2n), 4n, 'The result of (1n << Object(2n)) is 4n');
  
  assert.sameValue({
    [Symbol.toPrimitive]: function() {
      return 2n;
    }
  } << 1n, 4n, 'The result of (({[Symbol.toPrimitive]: function() {return 2n;}}) << 1n) is 4n');
  
  assert.sameValue(1n << {
    [Symbol.toPrimitive]: function() {
      return 2n;
    }
  }, 4n, 'The result of (1n << {[Symbol.toPrimitive]: function() {return 2n;}}) is 4n');
  
  assert.sameValue({
    valueOf: function() {
      return 2n;
    }
  } << 1n, 4n, 'The result of (({valueOf: function() {return 2n;}}) << 1n) is 4n');
  
  assert.sameValue(1n << {
    valueOf: function() {
      return 2n;
    }
  }, 4n, 'The result of (1n << {valueOf: function() {return 2n;}}) is 4n');
  
  assert.sameValue({
    toString: function() {
      return 2n;
    }
  } << 1n, 4n, 'The result of (({toString: function() {return 2n;}}) << 1n) is 4n');
  
  assert.sameValue(1n << {
    toString: function() {
      return 2n;
    }
  }, 4n, 'The result of (1n << {toString: function() {return 2n;}}) is 4n');