test: handle host endianness in FileAPI Blob WPT tests

[abhayagarwal-dev]

Description

ECMAScript TypedArrays store elements using host-native byte order. On big-endian architectures (such as IBM s390x / LinuxONE and AIX ppc64), TypedArray byte layouts differ from little-endian platforms, causing Blob-constructor.any.js subtests to fail when passing multi-byte TypedArrays (Uint16Array, Uint32Array, Float16Array, Float64Array, BigInt64Array).

This PR:

1. Updates the Blob-constructor.any.js WPT fixture with runtime host endianness detection (isLittleEndian) and adjusts the expected values so the subtests pass on both little-endian and big-endian systems.
2. Updates test/wpt/status/FileAPI/blob.cjs to remove the temporary os.endianness() === 'BE' expected failure entries, as the tests now pass cleanly across all supported architectures.

Test

Before (in Big-Endian machine):

    [UNEXPECTED_FAILURE][FAIL] Passing typed arrays as elements of the blobParts array should work.
    assert_equals: expected "PASSPASSPASSPASSPASSPASSPASS" but got "PASSPASSAPSSAPSSSSAPSSAPSSAP"
        at Test.<anonymous> (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/test/fixtures/wpt/FileAPI/support/Blob.js:16:5)
        at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    Command: /home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/out/Release/node  /home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/test/wpt/test-blob.js 'Blob-constructor.any.js'
    

    
    [UNEXPECTED_FAILURE][FAIL] Passing a Float64Array as element of the blobParts array should work.
    assert_equals: expected "PASSPASS" but got "SSAPSSAP"
        at Test.<anonymous> (/home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/test/fixtures/wpt/FileAPI/support/Blob.js:16:5)
        at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    Command: /home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/out/Release/node  /home/iojs/build/workspace/node-test-commit-aix/nodes/aix72-ppc64/test/wpt/test-blob.js 'Blob-constructor.any.js'

    Files: 2/2 ran, 0 passed, 0 skipped, 0 expected failures, 2 unexpected failures, 0 unexpected passes
Subtests: 138 passed, 0 skipped, 0 expected failures, 8 unexpected failures, 0 unexpected passes

After(In Big-Endian machine):

Files: 2/2 ran, 2 passed, 0 skipped, 0 expected failures, 0 unexpected failures, 0 unexpected passes
Subtests: 146 passed, 0 skipped, 0 expected failures, 0 unexpected failures, 0 unexpected passes

References

• Upstream WPT PR: FileAPI: handle host endianness in Blob constructor TypedArray tests web-platform-tests/wpt#63714
• Refs: test: update FileAPI wpt #55194
• Refs: test: update FileAPI tests from WPT #61750

[nodejs-github-bot]

Review requested:

• @nodejs/web-standards

[panva]

Thank you for contributing this upstream. We'll run a WPT update worfklow for getting this updated in our repo instead.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.50%. Comparing base (1c90519) to head (4c0d76d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #66771   +/-   ##
=======================================
  Coverage   90.49%   90.50%           
=======================================
  Files         797      797           
  Lines      277598   277598           
  Branches    53336    53336           
=======================================
+ Hits       251220   251245   +25     
+ Misses      16790    16774   -16     
+ Partials     9588     9579    -9     

see 29 files with indirect coverage changes

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