vi.mocked() with partial: true does the opposite of what's intended?

[kahagerman]

Describe the bug

I'm new to vitest/mocking in general, so please tell me if I'm misunderstanding the use case here.

To my understanding, this code should compile.

const mockedObject: ComplexInterface = vi.mocked({onlyOneProperty: "set"}, {partial: true})

From the original issue (#1739), the purpose of partial: true seems to be to allow defining only a few properties without typescript complaining.

But from what I can tell (simplifying the actual types somewhat), this function accepts the type T, and returns Partial<T>, where it should instead accept a Partial<T> and return T.

Am I simply misunderstanding this? (If so, it may be worth explaining these options better in the docs.)

Reproduction

N/A

System Info

N/A

Used Package Manager

pnpm

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[sheremet-va]

This works correctly. "mocked" is just a type hint noop, it doesn't do anything. You need pass down a spy, and partial will allow you to call mockReturnValue on it with incomplete data