Promise methods should not be enumerable, per https://people.mozilla.org/~jorendorff/es6-draft.html#table-4

The test checks Array.concat which is undefined; instead it should check Array.prototype.concat.

commit c56030aea7b3e43f46dbbc2b52859ca275cff226
Author: Rick Waldron <waldron.rick@gmail.com>
Date:   Thu Apr 30 15:17:44 2015 -0400

    Fix nits

commit 9b341022a9fd5a295ce85b630886dae10e10b653
Author: Rick Waldron <waldron.rick@gmail.com>
Date:   Tue Apr 28 13:52:04 2015 -0400

    Wrap expected construct failure in assert.throws

commit 9ef7e1c0499a99b15c64bb480dbfa41433cf9804
Author: Mike Pennisi <mike@mikepennisi.com>
Date:   Fri Apr 24 13:46:02 2015 -0400

    Introduce addition tests for the Set constructor

commit bd54cccf4a599c123fae5c97782f5562cd9da8a0
Author: Rick Waldron <waldron.rick@gmail.com>
Date:   Fri Apr 24 15:11:19 2015 -0400

    23.2 Set Objects, additions

commit 970e2ca95879161a8bb124ec712f7333fdea6798
Author: Rick Waldron <waldron.rick@gmail.com>
Date:   Tue Apr 21 12:44:41 2015 -0400

    23.2 Set Objects

- Remove no longer needed noStrict flags.
- Change tests to use propertyHelper.js for strict mode compatibility.
- Add tests for return value of `delete` operator, e.g. `delete Array.prototype === false`.
- Add non-writable tests for global NaN property.
- Split some tests to run in strict mode.
- Change tests with global `var length` declaration to use a different variable name for browser environments.
- Merge duplicated tests symbol-data-property-configurable-non-strict and symbol-data-property-configurable-strict.
- Merge duplicated tests symbol-data-property-writable-non-strict and symbol-data-property-writable-strict.
- (And a small change in propertyHelper to reduce code duplication in function call.)

Test for x.join(NaN) reports an error using the content of x.join("NaN"). This is confusing.

Add missing noStrict flags and variable declarations.

Part of issue #35.

These tests are derived from the following files within the Google V8
project:

    test/mjsunit/es6/generators-iteration.js
    test/mjsunit/es6/generators-objects.js
    test/mjsunit/es6/generators-runtime.js
    test/mjsunit/es6/generators-states.js

Object.freeze fixes
global object tests: noStrict
preventExtensions tests
Object.seal tests

one more freeze test

Add missing "var" declarations and noStrict flags.

Part of issue #35.

- Add missing "var" declarations and noStrict flags
- Remove invalid noStrict flags

Part of issue #35.

- Add missing "var" declarations and noStrict flags
- Remove with-statements (minor change in behaviour - primitive vs wrapper lookup, but does not seem too important for these tests)

Part of issue #35.

- Add missing "var" declarations and noStrict flags
- Remove with statements

Part of issue #35.

- Add missing "var" declarations and noStrict flags
- Remove invalid noStrict flags
- ietestcenter tests need fixed, require updates to use propertyHelper.js

Part of issue #35.

Add missing "var" declarations and noStrict flags.

Part of issue #35.

Add missing "var" declarations.

Part of issue #35.

Add missing "var" declarations and noStrict flags.

Part of issue #35.

Add missing "var" declarations and noStrict flags.

Part of issue #35.

Add missing "var" declarations and noStrict flags.

Part of issue #35.

Add missing "var" declarations and noStrict flags.

Part of issue #35.

- Add missing "var" declarations and noStrict flags
- Move code which requires non-strict semantics from Array.prototype.find_this-arg.js to Array.prototype.find_this-arg-receiver-primitive.js
- Remove duplicate code from Array.prototype.findIndex_this-arg.js, already present in Array.prototype.findIndex_this-arg-receiver-primitive.js
- Remove test code from Array.of_assignment-to-new-object-length.js, does not work in strict mode

Part of issue #35

- Duplicate properties are allowed in object literals: test/language/expressions/object/*.js
- RegExpBuiltinExec was changed to use ToLength(lastIndex): test/built-ins/RegExp/prototype/exec/S15.10.6.2_A5_T3.js
- Non-undefined flags arguments allowed in RegExp constructor call: test/built-ins/RegExp/*.js
- Array.prototype.push throws TypeError if new length exceeds Number.MAX_SAFE_INTEGER: test/built-ins/Array/prototype/push/S15.4.4.7_A2_T2.js
- .length property of bound functions is configurable: test/built-ins/Function/prototype/bind/15.3.4.5-15-2.js
- Array.prototype changed back to exotic Array object: test/built-ins/Array/prototype/*.js, test/built-ins/Array/isArray/15.4.3.2-0-5.js

- in-statement-position-label-statement.js is an Annex-B test (B.3.2 Labelled Function Declarations), moved to annexB directory
- identifier-let-allowed-as-lefthandside-expression-strict.js needs to check for a SyntaxError (ES6, 12.1.1)
- Remove sort() calls in test/built-ins/Object/getOwnPropertyNames/*.js
- Remove sort() calls in test/language/block-scope/syntax/for-in/acquire-properties-from-*.js
- verifyConfigurable() needs to called last in test/built-ins/Object/is/length.js
- All productions within ClassBody are implicitly strict, update test/language/class/method-definition/yield-as-*.js accordingly
- Remove unnecessary noStrict flag in test/language/class/method-definition/yield-as-generator-method-binding-identifier.js
- Check own symbols are returned in property creation order from Object.getOwnPropertySymbols():
  - test/language/computed-property-names/basics/symbol.js
  - test/language/computed-property-names/class/method/symbol.js
  - test/language/computed-property-names/class/static/method-symbol.js
  - test/language/computed-property-names/object/method/symbol.js
- Fix copy-paste error in test/language/expressions/object/method-definition/yield-as-function-expression-binding-identifier.js

7.2.9 SameValue(x, y)

These tests are derived from the following files within the Google V8
project:

    test/mjsunit/es6/typed-array-iterator.js
    test/mjsunit/es6/arguments-iterator.js
    test/mjsunit/es6/string-iterator.js
    test/mjsunit/es6/collection-iterator.js

These tests are derived from the following files within the Google V8 project:

	test/mjsunit/harmony/private.js

These tests are derived from the following files within the Google V8 project:

    	test/mjsunit/harmony/array-fill.js
    	test/mjsunit/harmony/array-find.js
    	test/mjsunit/harmony/array-findindex.js
    	test/mjsunit/harmony/array-from.js
    	test/mjsunit/harmony/array-of.js

Seems, Math.round(x) is implemented as `Math.floor(x + 0.5)` in some JavaScript engines.
The "Note 2 for Math.round"  was fixed for ES6 (see http://es5.github.io/#x15.8.2.15 and https://people.mozilla.org/~jorendorff/es6-draft.html#sec-math.round )

These tests are derived from the following files within the Google V8
project:

    test/mjsunit/es6/templates.js

Some of these tests include non-printable characters, causing git to
infer that they are binary files. Introduce a `.gitattributes` file to
configure git to consistently display the source text of all JavaScript
files.