test: add test case for normalize_version

[jbedard]

Changes are visible to end-users: no

Test plan

• Covered by existing test cases
• New test cases added

[aspect-workflows]

✨ Aspect Workflows Tasks

📅 Sat Jul 18 00:31:58 UTC 2026

✅ 40 successful tasks

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[github-actions]

py_binary startup benchmark

Version	Mean (ms)	Median (ms)	± stddev	vs BCR	vs main	Build (s)
BCR 1.11.7 (baseline)	185.089	178.415	±29.085	—	—	83.35
HEAD main	57.119	56.716	±1.552	-69.1%	—	10.51
This PR	57.349	57.220	±0.760	-69.0%	+0.4%	7.54

Measured with hyperfine --warmup 5 --runs 50 on Linux
Gate: PR vs HEAD main (threshold: 10%). BCR is shown only as a historical baseline.
Build time: cold bazel build //:bench with isolated output base, no disk cache.

sys.path quality

Version	sys.path entries	distinct site-packages roots	duplicate realpaths
BCR 1.11.7 (baseline)	6	1	0
HEAD main	7	2	0
This PR	7	2	0

sys.path quality measured by bench_syspath inside the assembled venv. Duplicate realpaths indicate symlink redundancy; many distinct site-packages roots suggest an inefficient venv layout.

Bazel analysis benchmark

Version	Mean (ms)	Median (ms)	± stddev	vs BCR	vs main	Packages	Targets
BCR 2.0.0-alpha.4 (baseline)	10127.157	10100.629	±136.877	—	—	101	301
HEAD main	9413.341	9457.148	±128.988	-7.0%	—	101	301
This PR	9346.540	9356.109	±145.164	-7.7%	-0.7%	101	301

Measured with hyperfine --warmup 1 --runs 10 on Linux
Gate: PR vs HEAD main (threshold: 10%). BCR is shown only as a historical baseline.
Command: cold bazel build --nobuild //workspace/... with isolated output base, no disk cache.

Auxiliary metrics

Version	Loaded packages	Configured targets
BCR 2.0.0-alpha.4 (baseline)	101	301
HEAD main	101	301
This PR	101	301