hexclave/pgmock

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1231 stars · 24 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

pgmock is an in-memory PostgreSQL mock server for unit and E2E tests that runs entirely in WebAssembly on Node.js and in the browser, with no external dependencies. It emulates a full Postgres server via an x86 emulator to achieve feature parity with production PostgreSQL environments.

Use cases

• run an in-memory postgres database for unit tests
• mock postgres in e2e tests without docker
• use a real postgres server in the browser for testing
• test node-postgres clients against a disposable database
• avoid discrepancies between test and production postgres environments

When to choose

• you need full Postgres feature parity (connections, extensions) in tests
• you want a zero-dependency, in-process Postgres for Node.js or browser tests
• performance of the database is not critical but correctness is

When to avoid

• you only need a lightweight browser-side SQL database (consider pglite)
• test suite performance is critical, since x86 emulation is slow
• you need a production-grade persistent Postgres instance

Facets

library · maturity active

testing mocking database e2e-testing testing databases developer-tools browser wasm in-memory-postgres wasm unit-testing postgres-mock test-doubles nodejs javascript

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markdown · JSON · MCP: product_card(name="hexclave/pgmock")