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diff --git a/browser/components/newtab/test/unit/asrouter/templates/EOYSnippet.test.jsx b/browser/components/newtab/test/unit/asrouter/templates/EOYSnippet.test.jsx
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+++ b/browser/components/newtab/test/unit/asrouter/templates/EOYSnippet.test.jsx
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+import { EOYSnippet } from "content-src/asrouter/templates/EOYSnippet/EOYSnippet";
+import { GlobalOverrider } from "test/unit/utils";
+import { mount } from "enzyme";
+import React from "react";
+import schema from "content-src/asrouter/templates/EOYSnippet/EOYSnippet.schema.json";
+
+const DEFAULT_CONTENT = {
+  text: "foo",
+  donation_amount_first: 50,
+  donation_amount_second: 25,
+  donation_amount_third: 10,
+  donation_amount_fourth: 5,
+  donation_form_url: "https://submit.form",
+  button_label: "Donate",
+};
+
+describe("EOYSnippet", () => {
+  let sandbox;
+  let wrapper;
+
+  /**
+   * mountAndCheckProps - Mounts a EOYSnippet with DEFAULT_CONTENT extended with any props
+   *                      passed in the content param and validates props against the schema.
+   * @param {obj} content Object containing custom message content (e.g. {text, icon, title})
+   * @returns enzyme wrapper for EOYSnippet
+   */
+  function mountAndCheckProps(content = {}, provider = "test-provider") {
+    const props = {
+      content: Object.assign({}, DEFAULT_CONTENT, content),
+      provider,
+      onAction: sandbox.stub(),
+      onBlock: sandbox.stub(),
+      sendClick: sandbox.stub(),
+    };
+    const comp = mount(<EOYSnippet {...props} />);
+    // Check schema with the final props the component receives (including defaults)
+    assert.jsonSchema(comp.children().get(0).props.content, schema);
+    return comp;
+  }
+
+  beforeEach(() => {
+    sandbox = sinon.createSandbox();
+    wrapper = mountAndCheckProps();
+  });
+
+  afterEach(() => {
+    sandbox.restore();
+  });
+
+  it("should have the correct defaults", () => {
+    wrapper = mountAndCheckProps();
+    // SendToDeviceSnippet is a wrapper around SubmitFormSnippet
+    const { props } = wrapper.children().get(0);
+
+    const defaultProperties = Object.keys(schema.properties).filter(
+      prop => schema.properties[prop].default
+    );
+    assert.lengthOf(defaultProperties, 4);
+    defaultProperties.forEach(prop =>
+      assert.propertyVal(props.content, prop, schema.properties[prop].default)
+    );
+  });
+
+  it("should render 4 donation options", () => {
+    assert.lengthOf(wrapper.find("input[type='radio']"), 4);
+  });
+
+  it("should have a data-metric field", () => {
+    assert.ok(wrapper.find("form[data-metric='EOYSnippetForm']").exists());
+  });
+
+  it("should select the second donation option", () => {
+    wrapper = mountAndCheckProps({ selected_button: "donation_amount_second" });
+
+    assert.propertyVal(
+      wrapper.find("input[type='radio']").get(1).props,
+      "defaultChecked",
+      true
+    );
+  });
+
+  it("should set frequency value to monthly", () => {
+    const form = wrapper.find("form").instance();
+    assert.equal(form.querySelector("[name='frequency']").value, "single");
+
+    form.querySelector("#monthly-checkbox").checked = true;
+    wrapper.find("form").simulate("submit");
+
+    assert.equal(form.querySelector("[name='frequency']").value, "monthly");
+  });
+
+  it("should block after submitting the form", () => {
+    const onBlockStub = sandbox.stub();
+    wrapper.setProps({ onBlock: onBlockStub });
+
+    wrapper.find("form").simulate("submit");
+
+    assert.calledOnce(onBlockStub);
+  });
+
+  it("should not block if do_not_autoblock is true", () => {
+    const onBlockStub = sandbox.stub();
+    wrapper = mountAndCheckProps({ do_not_autoblock: true });
+    wrapper.setProps({ onBlock: onBlockStub });
+
+    wrapper.find("form").simulate("submit");
+
+    assert.notCalled(onBlockStub);
+  });
+
+  it("should report form submissions", () => {
+    wrapper = mountAndCheckProps();
+    const { sendClick } = wrapper.props();
+
+    wrapper.find("form").simulate("submit");
+
+    assert.calledOnce(sendClick);
+    assert.equal(
+      sendClick.firstCall.args[0].target.dataset.metric,
+      "EOYSnippetForm"
+    );
+  });
+
+  it("it should preserve URL GET params as hidden inputs", () => {
+    wrapper = mountAndCheckProps({
+      donation_form_url:
+        "https://donate.mozilla.org/pl/?utm_source=desktop-snippet&amp;utm_medium=snippet&amp;utm_campaign=donate&amp;utm_term=7556",
+    });
+
+    const hiddenInputs = wrapper.find("input[type='hidden']");
+
+    assert.propertyVal(
+      hiddenInputs.find("[name='utm_source']").props(),
+      "value",
+      "desktop-snippet"
+    );
+    assert.propertyVal(
+      hiddenInputs.find("[name='amp;utm_medium']").props(),
+      "value",
+      "snippet"
+    );
+    assert.propertyVal(
+      hiddenInputs.find("[name='amp;utm_campaign']").props(),
+      "value",
+      "donate"
+    );
+    assert.propertyVal(
+      hiddenInputs.find("[name='amp;utm_term']").props(),
+      "value",
+      "7556"
+    );
+  });
+
+  describe("locale", () => {
+    let stub;
+    let globals;
+    beforeEach(() => {
+      globals = new GlobalOverrider();
+      stub = sandbox.stub().returns({ format: () => {} });
+
+      globals = new GlobalOverrider();
+      globals.set({ Intl: { NumberFormat: stub } });
+    });
+    afterEach(() => {
+      globals.restore();
+    });
+
+    it("should use content.locale for Intl", () => {
+      // triggers component rendering and calls the function we're testing
+      wrapper.setProps({
+        content: {
+          locale: "locale-foo",
+          donation_form_url: DEFAULT_CONTENT.donation_form_url,
+        },
+      });
+
+      assert.calledOnce(stub);
+      assert.calledWithExactly(stub, "locale-foo", sinon.match.object);
+    });
+
+    it("should use navigator.language as locale fallback", () => {
+      // triggers component rendering and calls the function we're testing
+      wrapper.setProps({
+        content: {
+          locale: null,
+          donation_form_url: DEFAULT_CONTENT.donation_form_url,
+        },
+      });
+
+      assert.calledOnce(stub);
+      assert.calledWithExactly(stub, navigator.language, sinon.match.object);
+    });
+  });
+});