vue-select/tests/unit/Ajax.spec.js

import { selectWithProps } from "../helpers";
import { shallowMount } from '@vue/test-utils';
import vSelect from '../../src/components/Select';

describe("Asynchronous Loading", () => {
  it("can toggle the loading class", () => {
    const Select = selectWithProps();

    Select.vm.toggleLoading();
    expect(Select.vm.mutableLoading).toEqual(true);

    Select.vm.toggleLoading(true);
    expect(Select.vm.mutableLoading).toEqual(true);
  });

  it("should trigger the search event when the search text changes", async () => {
    const Select = selectWithProps();

    Select.vm.search = "foo";
    await Select.vm.$nextTick();

    const events = Select.emitted("search");

    expect(events).toContainEqual(["foo", Select.vm.toggleLoading]);
    expect(events.length).toEqual(1);
  });

  it("should trigger the search event if the search text is empty", async () => {
    const Select = selectWithProps();

    Select.vm.search = "foo";
    await Select.vm.$nextTick();
    Select.vm.search = "";
    await Select.vm.$nextTick();

    const events = Select.emitted("search");

    expect(events).toContainEqual(["", Select.vm.toggleLoading]);
    expect(events.length).toEqual(2);
  });

  it("can set loading to false from the @search event callback", async () => {
    const Select = shallowMount(vSelect, {
      listeners: {
        search: (search, loading) => {
          loading(false)
        },
      },
    });

    Select.vm.mutableLoading = true;
    Select.vm.search = 'foo';
    await Select.vm.$nextTick();

    expect(Select.vm.mutableLoading).toEqual(false);
  });

  it('will sync mutable loading with the loading prop', async () => {
    const Select = selectWithProps({ loading: false });
    Select.setProps({ loading: true });
    await Select.vm.$nextTick();

    expect(Select.vm.mutableLoading).toEqual(true);
  });
});