In ECMAScript 5, assignment to a non-reference value throws a runtime
ReferenceError. ECMAscript 6 specifies an early ReferenceError in these
cases. Tests for this behavior have been authored to pass in both cases.
Simplify these tests to describe and assert the early error.
Some tests specifically concern the application of the `use strict`
directive as it appears in JavaScript source code. These tests should
*not* be run with the `onlyStrict` flag because relying on the test
runner to enable strict mode makes the semantics of the source code
irrelevant. Update these tests to use the `noStrict` flag.
Other tests concern language semantics that are only valid in strict
mode, but the mechanism for enabling strictness is inconseqential.
Update these tests to use the `onlyStrict` flag and remove any redundant
`use strict` directive prologues contained within.
Still other tests are valid both within and outside of strict mode.
In keeping with the majority of other tests, do not specify any
restrictions on the environments in which these tests may be run.
The increment/decrement operator evaluates its operand expression once. When
the operand expression is a property accessor, RequireObjectCoercible
and ToPropertyKey are called on the property accessor in the correct order.
André Bargull
Mike Pennisi
Rick Waldron
Brian Terlson