test(workflow-core): cover isFileResolved and parse owner

[Ma77Ball]

What changes were proposed in this PR?

• Add unit tests for FileResolver.isFileResolved covering non-empty scheme, missing scheme, and malformed URI cases.
• Add unit tests for FileResolver.parseDatasetOwnerAndName covering valid paths, too few segments, and a null path.

Any related issues, documentation, discussions?

Closes: #6698

How was this PR tested?

• Run: sbt "WorkflowCore/testOnly *FileResolverSpec", expect all 9 tests passing.
• Test-only change; no production code is modified.

Was this PR authored or co-authored using generative AI tooling?

Co-authored with Claude Opus 4.8 in compliance with ASF

[github-actions]

Automated Reviewer Suggestions

Based on the git blame history of the changed files, we recommend the following reviewers:

• Contributors with relevant context: @Yicong-Huang
  You can notify them by mentioning @Yicong-Huang in a comment.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.65%. Comparing base (0467c76) to head (2c9ebde).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #6699   +/-   ##
=========================================
  Coverage     74.65%   74.65%           
+ Complexity     3438     3436    -2     
=========================================
  Files          1160     1160           
  Lines         45793    45793           
  Branches       5069     5069           
=========================================
  Hits          34189    34189           
+ Misses         9953     9951    -2     
- Partials       1651     1653    +2     

Flag	Coverage Δ		*Carryforward flag
access-control-service	70.00% <ø> (ø)
agent-service	76.76% <ø> (ø)		Carriedforward from 0467c76
amber	66.81% <ø> (ø)
computing-unit-managing-service	18.00% <ø> (ø)
config-service	66.66% <ø> (ø)
file-service	66.80% <ø> (ø)
frontend	78.56% <ø> (ø)		Carriedforward from 0467c76
notebook-migration-service	78.94% <ø> (ø)
pyamber	91.99% <ø> (ø)		Carriedforward from 0467c76
workflow-compiling-service	55.14% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.

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[github-actions]

⚠️ Benchmark changes need a look

🟢 0 better · 🔴 9 worse · ⚪ 6 noise (<±5%) · 0 without baseline

Compared against main 0467c76 benchmarked on this same runner, so the delta is largely free of cross-runner hardware noise. The "7d avg" column still reflects the gh-pages dashboard. Treat <±5% as noise unless repeated.

Dashboard · Run

	config	throughput	MB/s	latency	max Δ latest / 7d
🔴	bs=10 sw=10 sl=64	381	0.233	25,475/33,639/33,639 us	🔴 -17.4% / 🔴 +115.2%
🔴	bs=100 sw=10 sl=64	942	0.575	105,755/125,540/125,540 us	🔴 +8.9% / 🔴 +18.4%
🔴	bs=1000 sw=10 sl=64	1,093	0.667	904,121/1,030,623/1,030,623 us	🔴 +5.9% / 🟢 -7.2%

Baseline details

Latest main 0467c76 from same runner

config	metric	PR	latest main	7d avg	Δ latest	Δ 7d
bs=10 sw=10 sl=64	throughput	381 tuples/sec	461 tuples/sec	767.23 tuples/sec	-17.4%	-50.3%
bs=10 sw=10 sl=64	MB/s	0.233 MB/s	0.282 MB/s	0.468 MB/s	-17.4%	-50.2%
bs=10 sw=10 sl=64	p50	25,475 us	21,708 us	12,705 us	+17.4%	+100.5%
bs=10 sw=10 sl=64	p95	33,639 us	31,885 us	15,633 us	+5.5%	+115.2%
bs=10 sw=10 sl=64	p99	33,639 us	31,885 us	20,214 us	+5.5%	+66.4%
bs=100 sw=10 sl=64	throughput	942 tuples/sec	967 tuples/sec	1,001 tuples/sec	-2.6%	-5.9%
bs=100 sw=10 sl=64	MB/s	0.575 MB/s	0.59 MB/s	0.611 MB/s	-2.5%	-5.9%
bs=100 sw=10 sl=64	p50	105,755 us	104,301 us	99,949 us	+1.4%	+5.8%
bs=100 sw=10 sl=64	p95	125,540 us	115,245 us	105,996 us	+8.9%	+18.4%
bs=100 sw=10 sl=64	p99	125,540 us	115,245 us	117,999 us	+8.9%	+6.4%
bs=1000 sw=10 sl=64	throughput	1,093 tuples/sec	1,055 tuples/sec	1,033 tuples/sec	+3.6%	+5.8%
bs=1000 sw=10 sl=64	MB/s	0.667 MB/s	0.644 MB/s	0.631 MB/s	+3.6%	+5.8%
bs=1000 sw=10 sl=64	p50	904,121 us	950,901 us	974,571 us	-4.9%	-7.2%
bs=1000 sw=10 sl=64	p95	1,030,623 us	973,223 us	1,016,467 us	+5.9%	+1.4%
bs=1000 sw=10 sl=64	p99	1,030,623 us	973,223 us	1,048,798 us	+5.9%	-1.7%

Raw CSV

config_idx,batch_size,schema_width,string_len,num_batches,total_ms,total_tuples,total_bytes,tuples_per_sec,mb_per_sec,lat_p50_us,lat_p95_us,lat_p99_us
0,10,10,64,20,524.36,200,128000,381,0.233,25475.17,33639.16,33639.16
1,100,10,64,20,2122.58,2000,1280000,942,0.575,105754.99,125539.68,125539.68
2,1000,10,64,20,18298.07,20000,12800000,1093,0.667,904121.24,1030622.51,1030622.51

[Copilot]

Pull request overview

This PR adds Scala unit test coverage in workflow-core for FileResolver.isFileResolved and FileResolver.parseDatasetOwnerAndName, improving branch coverage for URI-scheme detection and dataset-path parsing logic used by the workflow storage layer.

Changes:

• Add tests for isFileResolved covering non-empty scheme, missing scheme, and malformed URI inputs.
• Add tests for parseDatasetOwnerAndName covering valid dataset paths, insufficient segments, and null input.

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[aglinxinyuan]

LGTM!