Testing AI Agents with Vitest 4
I verified practical patterns for mocking the Anthropic SDK messages.create() and streaming responses in Vitest 4.1.7, keeping agent tests fast and reliable.
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Vitest
2 posts
Migrating from Jest to Vitest 4: A Complete 2026 Guide
Migrate Jest to Vitest 4.1.7 painlessly: config conversion, vi.importActual async traps, stable Browser Mode, and new matchers, all tested in a real sandbox.