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Vitest · Method

vi.mocked

vi.mocked is a TypeScript helper that marks an existing value as mocked for type checking. It returns the same value at runtime and supports shallow, deep, and partial mock typing.

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Syntax

vi.mocked<T>(object: T, deep?: boolean): MaybeMockedDeep<T>
vi.mocked<T>(object: T, options?: { partial?: boolean; deep?: boolean }): MaybePartiallyMockedDeep<T>

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  • vi.mock
  • vi.fn
  • vi.importMock

Source: Vi | Vitest. Checked 2026-11-03.