Module testing

Testing utilities for Genkit apps and model plugins.

• mockModel — a programmable mock model with typed call inspection, for testing flows, prompts, and tools deterministically.
• echoModel — a zero-config model that echoes the rendered request, for asserting prompt/message assembly.
• testModels — a conformance harness for model plugin authors.

import { mockModel, echoModel, testModels } from 'genkit/testing';
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