Add comprehensive sync-branch test coverage (bd-0e74)
Added 4 new integration tests to ensure sync-branch workflow is robust:
1. TestSyncBranchConfigChange - Validates changing sync.branch config
after worktrees exist. Tests smooth transition between branches.
2. TestSyncBranchMultipleConcurrentClones - Tests 3-way clone sync
workflow. Simulates real multi-agent collaboration scenario.
3. TestSyncBranchPerformance - Validates commit overhead < 150ms.
Current performance: avg 77ms (well within target).
4. TestSyncBranchNetworkFailure - Tests graceful handling of network
errors during push. Ensures local commits succeed even when remote
is unreachable.
All tests pass:
- cmd/bd (sync branch): PASS (5.361s)
- internal/git: PASS (1.071s)
- internal/syncbranch: PASS (0.312s)
Test coverage now includes: config change handling, multiple concurrent
clones, network failure recovery, performance validation, fresh setup,
issue operations, error handling, sparse checkout.
Closes bd-0e74
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Co-Authored-By: Claude <noreply@anthropic.com>
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