Unit tests for FileField

[joegasewicz]

This should be quite straight forward to write if you follow the tests in PasswordField

react-bare-forms/tests/elements/PasswordField.spec.tsx

Line 169 in c70f8e8

it("should maintain a disabled submit button with both password fields not matching", () => {

Basically you can render the component twice or even 3 times to get the correct validation results.