fix UtcDate unit test

import { shallowMount } from "@vue/test-utils";

import { getLocalVue } from "tests/jest/helpers";

import UtcDate from "./UtcDate.vue";

import { format, parseISO } from "date-fns";

describe("UTCDate component", () => {

    const localVue = getLocalVue();

        expect(wrapper.text()).toContain("years ago");

        await wrapper.setProps({ mode: "pretty" });

        expect(wrapper.text()).toBe("Wednesday Oct 21st 16:29:00 2015 UTC");

        expect(wrapper.text()).toBe(format(parseISO("2015-10-21T16:29:00.000Z"), "eeee MMM do H:mm:ss yyyy zz"));

    });

});