Filtering countries test

CountriesContainer.js

  it("should filter countries by name when input value is changed", () => {
    useFetch.mockReturnValue({
      loading: false,
      data: stubbedCountries,
      error: null,
    });
    const { getByTestId } = render(<CountriesContainer />);

    act(() => {
      fireEvent.change(getByTestId("filter-input-name"), {
        target: { value: "Slov" },
      });
    });

    expect(getByTestId("countries-container").children).toHaveLength(1);
    expect(getByTestId("countries-container").textContent).toContain(
      "Slovakia"
    );
  });