forked from molecule-ai/molecule-core
48b494def3
Both backends panicked when called on a zero-valued or nil receiver:
Provisioner.{Stop,IsRunning} dereferenced p.cli; CPProvisioner.{Stop,
IsRunning} dereferenced p.httpClient. The orphan sweeper and shutdown
paths can call these speculatively where the receiver isn't fully
wired — the panic crashed the goroutine instead of the caller seeing
a clean error.
Three changes:
1. Add ErrNoBackend (typed sentinel) and nil-guard the four methods.
- Provisioner.{Stop,IsRunning}: guard p == nil || p.cli == nil at
the top.
- CPProvisioner.Stop: guard p == nil up top, then httpClient nil
AFTER resolveInstanceID + empty-instance check (the empty
instance_id path doesn't need HTTP and stays a no-op success
even on zero-valued receivers — preserved historical contract
from TestIsRunning_EmptyInstanceIDReturnsFalse).
- CPProvisioner.IsRunning: same shape — empty instance_id stays
(false, nil); httpClient-nil with non-empty instance_id returns
ErrNoBackend.
2. Flip the t.Skip on TestDockerBackend_Contract +
TestCPProvisionerBackend_Contract — both contract tests run now
that the panics are gone. Skipped scenarios were the regression
guard for this fix.
3. Add TestZeroValuedBackends_NoPanic — explicit assertion that
zero-valued and nil receivers return cleanly (no panic). Docker
backend always returns ErrNoBackend on zero-valued; CPProvisioner
may return (false, nil) when the DB-lookup layer absorbs the case
(no instance to query → no HTTP needed). Both are acceptable per
the issue's contract — the gate is no-panic.
Tests:
- 6 sub-cases across the new TestZeroValuedBackends_NoPanic
- TestDockerBackend_Contract + TestCPProvisionerBackend_Contract
now run their 2 scenarios (4 sub-cases each)
- All existing provisioner tests still green
- go build ./... + go vet ./... + go test ./... clean
Closes drift-risk #6 in docs/architecture/backends.md.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| backend_contract_test.go | ||
| cp_provisioner_instance_id_test.go | ||
| cp_provisioner_test.go | ||
| cp_provisioner.go | ||
| isrunning_test.go | ||
| platform_test.go | ||
| provisioner_test.go | ||
| provisioner.go | ||