How can I get the arguments called in jest mock function?

Just use mockObject.calls. In my case I used:

const call = mockUpload.mock.calls[0][0]

Here's the documentation about the mock property

Here is a simple way to assert the parameter passed.

expect(mockedFunction).toHaveBeenCalledWith("param1","param2");

You can use toHaveBeenCalledWith() together with expect.stringContaining or expect.arrayContaining() or expect.objectContaining()

...
const { host } = new URL(url);
expect(mockedFunction).toHaveBeenCalledWith("param1", expect.stringContaining(`http://${host}...`);

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