bootstrap-vue/src/components/navbar/navbar-toggle.spec.js

BootstrapVue, with over 40 plugins and more than 75 custom components, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-ARIA accessibility markup.

import { mount } from '@vue/test-utils'
import BNavbarToggle from './navbar-toggle'

describe('navbar-toggle', () => {
  it('default has tag "button"', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target'
      }
    })
    expect(wrapper.is('button')).toBe(true)
  })

  it('default has class "navbar-toggler"', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target'
      }
    })
    expect(wrapper.classes()).toContain('navbar-toggler')
    expect(wrapper.classes().length).toBe(1)
  })

  it('default has default attributes', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target'
      }
    })
    expect(wrapper.attributes('type')).toBe('button')
    expect(wrapper.attributes('aria-controls')).toBe('target')
    expect(wrapper.attributes('aria-expanded')).toBe('false')
    expect(wrapper.attributes('aria-label')).toBe('Toggle navigation')
  })

  it('default has inner button-close', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target'
      }
    })
    expect(wrapper.find('span.navbar-toggler-icon')).toBeDefined()
  })

  it('accepts custom label when label prop is set', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target',
        label: 'foobar'
      }
    })
    expect(wrapper.attributes('aria-label')).toBe('foobar')
  })

  it('emits click event', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target'
      }
    })
    let rootClicked = false
    function onRootClick() {
      rootClicked = true
    }
    wrapper.vm.$root.$on('bv::toggle::collapse', onRootClick)

    expect(wrapper.emitted('click')).not.toBeDefined()
    expect(rootClicked).toBe(false)

    wrapper.trigger('click')
    expect(wrapper.emitted('click')).toBeDefined()
    expect(rootClicked).toBe(true)

    wrapper.vm.$root.$off('bv::toggle::collapse', onRootClick)
  })

  it('sets aria-expanded when receives root emit for target', async () => {
    const wrapper = mount(BNavbarToggle, {
      propsData: {
        target: 'target'
      }
    })

    // Private state event
    wrapper.vm.$root.$emit('bv::collapse::state', 'target', true)
    expect(wrapper.attributes('aria-expanded')).toBe('true')
    wrapper.vm.$root.$emit('bv::collapse::state', 'target', false)
    expect(wrapper.attributes('aria-expanded')).toBe('false')
    wrapper.vm.$root.$emit('bv::collapse::state', 'foo', true)
    expect(wrapper.attributes('aria-expanded')).toBe('false')

    // Private sync event
    wrapper.vm.$root.$emit('bv::collapse::sync::state', 'target', true)
    expect(wrapper.attributes('aria-expanded')).toBe('true')
    wrapper.vm.$root.$emit('bv::collapse::sync::state', 'target', false)
    expect(wrapper.attributes('aria-expanded')).toBe('false')
    wrapper.vm.$root.$emit('bv::collapse::sync::state', 'foo', true)
    expect(wrapper.attributes('aria-expanded')).toBe('false')
  })
})