Because implementations are free to select any valid NaN value during
GetValueFromBuffer, tests concerning semantics for consistent NaN value
encoding cannot rely on values returned from that abstract operation.
Update the test for `%TypedArray%.prototype.map` to set the same NaN
values via `map` as set in the "control" array.
Ensure that NaN values are canonicalized consistently by all invocations
of SetValueInBuffer. Also ensure that `%TypedArray%.prototype.set` and
`%TypedArray%.prototype.slice` preserve the bit-level encoding of the
source data.
Use a set of experimentally-derived expressions known to produce NaN
values with distinct bit patterns in various platforms.
The RegExpBuiltinExec internal operation was modified in March of 2016
[1]: instead of referencing the `global` and `sticky` properties of the
"this" value, the algorithm now infers those values from the object's
[[OriginalFlags]] internal slot.
This change invalidated a number of tests. In cases where the change
resulted in an observable behavior, update the tests to assert the
latest specification text. In cases where the change removed a
previously-observable behavior, remove the files completely.
Specification text change set:
> 1. Assert: Type(_S_) is String.
> 1. Let _length_ be the number of code units in _S_.
> 1. Let _lastIndex_ be ? ToLength(? Get(_R_, `"lastIndex"`)).
> - 1. Let _global_ be ToBoolean(? Get(_R_, `"global"`)).
> - 1. Let _sticky_ be ToBoolean(? Get(_R_, `"sticky"`)).
> + 1. Let _flags_ be the value of _R_'s [[OriginalFlags]] internal slot.
> + 1. If _flags_ contains `"g"`, let _global_ be *true*, else let _global_ be *false*.
> + 1. If _flags_ contains `"y"`, let _sticky_ be *true*, else let _sticky_ be *false*.
> 1. If _global_ is *false* and _sticky_ is *false*, let _lastIndex_ be 0.
> 1. Let _matcher_ be the value of _R_'s [[RegExpMatcher]] internal slot.
> - 1. Let _flags_ be the value of _R_'s [[OriginalFlags]] internal slot.
> 1. If _flags_ contains `"u"`, let _fullUnicode_ be *true*, else let _fullUnicode_ be *false*.
> 1. Let _matchSucceeded_ be *false*.
> 1. Repeat, while _matchSucceeded_ is *false*
[1] https://github.com/tc39/ecma262/pull/494
Assert the expected behavior of the ArraySpeciesCreate abstract
operation in the 5 Array instance methods from which it is invoked.
This change set does not include tests for ECMAScript realm
considerations because Test262 does not currently expose a mechanism for
interfacing with realms.
