Local Emulator for Google Cloud Workflows
Google Cloud Workflows emulator eliminates deploy-to-cloud edit cycle friction.
BigQuery emulator server implemented in Go
The only open-source BigQuery emulator with multi-client conformance testing.
Backend developers, data engineers working with BigQuery
Google BigQuery · fake-bq · bigquery-mock
Google Cloud Workflows emulator eliminates deploy-to-cloud edit cycle friction.
This actually implements a surprisingly large slice of Snowflake: VARIANT/ARRAY/OBJECT types, LATERAL FLATTEN, QUALIFY, MERGE, COPY, transactions and ~90 JSON/array/window functions — all exposed via Snowflake SQL API v2 and compatible with the Go driver so most clients can point at localhost. Running on DataFusion in Rust and shipped as a Docker image with testcontainers/GHA examples makes it immediately useful in CI; just remember it's an emulator, not Snowflake's full runtime, so you may hit edge-case behavioral differences.
4MB image beats Localstack's bloat, but only SQS works so far.
LocalStack went proprietary—this AGPL binary fills the gap with 54k test variants.
Enables local LLMs in Firefox sidebar, but needs manual about:config edits.
Replaces slow TestContainers with dialect-specific in-memory SQL; fills real testing pain.