DigitalConsumer.ISS/src/digital-components/dropdown-question/dropdown-question.spec.js

import { shallowMount } from "@vue/test-utils";
import dropdownQuestion from "./dropdown-question";

// Mock CMS content
const questionText = "Question Text";
const mockMixin = {
  methods: {
    getCmsContent: jest.fn().mockImplementation(()=> {
      return questionText;
    })
  }
}

// TODO: Remove the following from dropdown-question.vue -> :class="(errors && errors.length) || hasError ? 'has-error' : ''"
// It is not being used.
describe("dropdownQuestion.vue", () => {

  it("Should render a select input", async () => {

    // Arrange   
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
      },
      mixins: [mockMixin]
    });

    wrapper.getCmsContent = jest.fn();

    // Act
    const select = wrapper.find("select");

    // Assert
    expect(select.exists()).toBe(true);

  });
  
  it("Should render the 'questionText' data value as the label text.", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
      },
      mixins: [mockMixin]
    });

    // Act
    const label = wrapper.find("label");

    // Assert
    expect(label.text()).toContain(questionText);

  });

  it("Should render the 'questionText' data value with '⁠' after the first character of each word in the label text when disableAutoFill is true.", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
        disableAutoFill: true,
      },
      mixins: [mockMixin]
    });

    // Mock CMS content ...
    // Trust me, the below instance of the string "Q⁠uestion Text" actually has the ⁠ in it. You just can't see it
    // Don't believe me? Copy and paste it into Google. Then inspect the search field element in Dev Tools, 
    // you will see "Q⁠uestion T⁠ext"
    const expectedQuestionText = "Q⁠uestion T⁠ext"; 

    // Act
    const label = wrapper.find("label");

    // Assert
    expect(label.text()).toContain(expectedQuestionText);

  });
  
  it("Should return input id as the id of the select field", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        inputId: "input ID",
        options: {},
      },
      mixins: [mockMixin]
    });

    // Act
    const select = wrapper.find("select");

    // Assert
    expect(select.attributes().id).toEqual("input ID");

  });
  
  it("Should render the 'questionText' data value as the aria-label attribute.", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
      },
      mixins: [mockMixin]
    });

    // Act
    const label = wrapper.find("label");

    // Assert
    expect(label.attributes("aria-label")).toContain(questionText);

  });

  it("Should return aria-disabled state as disabled", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
        isDisabled: true,
      },
      mixins: [mockMixin]
    });

    // Act
    const select = wrapper.find("select");

    // Assert
    expect(select.attributes("aria-disabled")).toEqual("true");

  });

  it("Should emit new value when modelValue is changed", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
        modelValue: "val",
      },
      mixins: [mockMixin]
    });

    // Act
    await wrapper.find("select").setValue("val2");

    // Assert
    expect(wrapper.emitted()).toHaveProperty('change')

  });

  it("Should call this.handleChange with new value when selectedOption is changed", async () => {
    // Arrange
    const wrapper = shallowMount(dropdownQuestion, {
      propsData: {
        options: {},
        modelValue: "0",
      },
      mixins: [mockMixin]
    });

    wrapper.vm.handleChange = jest.fn().mockImplementation(() => {});

    // Act
    wrapper.vm.$options.watch.selectedOption.call(wrapper.vm, 1);

    // Assert
    expect(wrapper.vm.handleChange).toHaveBeenCalled;

  });

});