Guides

Each guide works through one task from start to end, with code you can run. The sections on HTTP, gRPC and each feature say what each part does; the guides show the parts together.

Guide	What you build
Testing a REST client	Tests of a Go client of a users API: the happy path, an error answer, and what the client sent.
Mock files and the CLI	Mock files with editor support, served by the vlatte command and loaded by Go tests.
Record and replay	Mock files recorded from a real API once and replayed in every later run.
Chaos testing	Tests that a client retries a failing server, survives a reset connection, and gives up on a slow one.
Stateful flows	A cart and checkout flow whose answers depend on what came before, tested in parallel.
Testing a gRPC streaming client	Tests of a client of a server stream, through errors and a server that dies midway.
Docker Compose	vlatte next to an app under test, with mocks changed over the admin API.
Testing webhooks	A payment API that calls your service back, and a test that the callback came.
HTTPS and mTLS mocks	Tests of a client of an HTTPS-only API, with mutual TLS, and the CLI serving the same mock.
Testing an LLM streaming client	Tests of a client of a chat API that streams its answers, through a dropped stream and a rate limit.
Mocking a remote MCP server	Mock files that play an MCP server over Streamable HTTP, and a test of an MCP client against them.