expect(blocks).toHaveLength(1);

expect(requireBlock(blocks).type).toBe("image");

expect(onPrepareError).toHaveBeenCalledTimes(1);

expect(onPrepareError.mock.calls.at(0)?.[0]).toBeInstanceOf(Error);

expect(onPrepareError.mock.calls.at(0)?.[0]?.message).toMatch(

const firstPrepareError = onPrepareError.mock.calls[0]?.[0];

expect(firstPrepareError).toBeInstanceOf(Error);

expect(firstPrepareError?.message).toMatch(

/Managed image attachment .* could not be prepared/i,

);

});