Module testing 

Shared Postgres test infrastructure: per-test throwaway databases on the server named by FZ_TEST_POSTGRES_URL, so tests never see each other’s tables (issue #18).

Exported so cratefield-testing’s parity kit (issue #20) reuses the exact helper this crate’s own contract tests use — one implementation, not two. Tests skip with a printed reason when the variable is unset (CI provides a postgres:16 service container).

Structs

TempDb

A fresh database named fz_<tag>_<pid>_<n> on the given server; call TempDb::finish to drop it.

Functions

base_url

The server URL from FZ_TEST_POSTGRES_URL, when set (trimmed and non-empty).

skip_reason

The skip reason printed when a test cannot run without a server.