Previously, some tests verified two independent concerns simultaneously:
syntactic validity and runtime completion value. The former is relevant
for ECMAScript runtimes and parsers alike, but the latter is only
observable by runtimes.
Express expectations regarding syntactic validity using literal program
code so they can be used by parsers. Maintain the original tests which
rely on eval in order to preserve coverage for statement completion
values.
The tests for the parsing of various statement were expressed using
eval. This made the tests more complex than necessary and also prevented
the tests from providing value to ECMAScript parsers.
Remove the use of eval and instead express the expectations with literal
source text. Rename the files to make each test's purpose more clear.
Per https://tc39.github.io/ecma402/#sec-canonicalizelanguagetag
6.2.3 CanonicalizeLanguageTag ( locale )
The CanonicalizeLanguageTag abstract operation returns the canonical and case-regularized form of the locale argument (which must be a String value that is a structurally valid Unicode BCP 47 Locale Identifier as verified by the IsStructurallyValidLanguageTag abstract operation). A conforming implementation shall take the steps specified in the “BCP 47 Language Tag to Unicode BCP 47 Locale Identifier” algorithm, from Unicode Technical Standard #35 LDML § 3.3.1 BCP 47 Language Tag Conversion.
And
http://unicode.org/reports/tr35/#BCP_47_Language_Tag_Conversion
"
2. If the BCP 47 primary language subtag matches the type attribute of a languageAlias element in Supplemental Data, replace the language subtag with the replacement value.
If there are additional subtags in the replacement value, add them to the result, but only if there is no corresponding subtag already in the tag.
"
and
https://www.unicode.org/repos/cldr/trunk/common/supplemental/supplementalMetadata.xml
...
<languageAlias type="aar" replacement="aa" reason="overlong"/>
<!-- [Afar] -->
...
<languageAlias type="ces" replacement="cs" reason="overlong"/>
<!-- [Czech] -->
...
<languageAlias type="heb" replacement="he" reason="overlong"/>
<!-- [Hebrew] -->
