- **Refactor `internal/env` for testability.** Route every
`os`/filesystem
call in `env.go` through swappable package-level function variables
(`getEnv`, `setEnv`, `lookupEnv`, `openFile`). Split `parseEnvFile` into
a
thin file-opening wrapper plus a pure `parseEnvReader(io.Reader)` so the
parser can be tested directly without touching disk.
- **Hermetic tests, 96.9% coverage.** Rewrite `internal/env/env_test.go`
to
install in-memory fakes via `withFakeEnv` / `withFakeOpen` helpers that
swap the package vars and restore them on `t.Cleanup`. Tests no longer
mutate real process env or write temp `.env` files, removing a source of
flakiness under parallel test execution. New cases cover
`NewEnvironment`,
`setEnvDefault`, `loadEnvFile` error paths, and edge cases in the
parser.
- **Counterfeiter-based fake generation.** Add `counterfeiter` as a Go
tool
dependency, a `//go:generate` directive for the `Environment` interface
(`internal/env/gen.go`), and commit the generated
`internal/env/envfakes/fake_environment.go` so downstream packages can
test against a spec-faithful fake instead of hand-rolling stubs. Expose
the step as `make generate`.
- **Tooling.** `scripts/proxy-utest.sh` gains a `--coverage` / `-c` flag
that runs `go test -coverprofile=...` across `./cmd/...` and
`./internal/...` and prints per-function coverage via `go tool cover
-func`. The `srs-develop` skill doc is updated to include the
regenerate-fakes step and the new coverage flag.
- **Go version.** Bump `go.mod` to Go 1.25 (required for the `go tool`
directive used to pin the counterfeiter CLI as a tool dep).
---------
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
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