addUtmParams.test.js

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import { addUtmParams, BASE_PARAMS } from "content-src/lib/addUtmParams.mjs";

describe("addUtmParams", () => {

  const originalBaseParams = JSON.parse(JSON.stringify(BASE_PARAMS));

  afterEach(() => Object.assign(BASE_PARAMS, originalBaseParams));

  it("should convert a string URL", () => {

    const result = addUtmParams("https://foo.com", "foo");

    assert.equal(result.hostname, "foo.com");

});

  it("should add all base params", () => {

    assert.match(

      addUtmParams(new URL("https://foo.com"), "foo").toString(),

      /utm_source=activity-stream&utm_campaign=firstrun&utm_medium=referral/

);

});

  it("should allow updating base params utm values", () => {

    BASE_PARAMS.utm_campaign = "firstrun-default";

    assert.match(

      addUtmParams(new URL("https://foo.com"), "foo", "default").toString(),

      /utm_source=activity-stream&utm_campaign=firstrun-default&utm_medium=referral/

);

});

  it("should add utm_term", () => {

    const params = addUtmParams(new URL("https://foo.com"), "foo").searchParams;

    assert.equal(params.get("utm_term"), "foo", "utm_term");

});

  it("should not override the URL's existing utm param values", () => {

    const url = new URL("https://foo.com/?utm_source=foo&utm_campaign=bar");

    const params = addUtmParams(url, "foo").searchParams;

    assert.equal(params.get("utm_source"), "foo", "utm_source");

    assert.equal(params.get("utm_campaign"), "bar", "utm_campaign");

    assert.equal(params.get("utm_medium"), "referral", "utm_medium");

});

});