bootstrap-vue/src/components/form-select/form-select.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 { waitNT, waitRAF } from '../../../tests/utils'
import BFormSelect from './form-select'

describe('form-select', () => {
  it('has select as root element', async () => {
    const wrapper = mount(BFormSelect)
    expect(wrapper.is('select')).toBe(true)

    wrapper.destroy()
  })

  it('has class custom-select', async () => {
    const wrapper = mount(BFormSelect)
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(1)

    wrapper.destroy()
  })

  it('does not have attr multiple by default', async () => {
    const wrapper = mount(BFormSelect)
    expect(wrapper.attributes('multiple')).not.toBeDefined()

    wrapper.destroy()
  })

  it('does not have attr required by default', async () => {
    const wrapper = mount(BFormSelect)
    expect(wrapper.attributes('required')).not.toBeDefined()

    wrapper.destroy()
  })

  it('has attr required when required=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        required: true
      }
    })
    expect(wrapper.attributes('required')).toBeDefined()

    wrapper.destroy()
  })

  it('does not have attr form by default', async () => {
    const wrapper = mount(BFormSelect)
    expect(wrapper.attributes('form')).not.toBeDefined()

    wrapper.destroy()
  })

  it('has attr form when form is set', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        form: 'foobar'
      }
    })
    expect(wrapper.attributes('form')).toBeDefined()
    expect(wrapper.attributes('form')).toBe('foobar')

    wrapper.destroy()
  })

  it('has attr multiple when multiple=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        multiple: true,
        value: []
      }
    })
    expect(wrapper.attributes('multiple')).toBeDefined()

    wrapper.destroy()
  })

  it('has attr size when select-size is set', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        selectSize: 4
      }
    })
    expect(wrapper.attributes('size')).toBeDefined()
    expect(wrapper.attributes('size')).toBe('4')
    expect(wrapper.attributes('multiple')).not.toBeDefined()

    wrapper.destroy()
  })

  it('has auto ID attr by default', async () => {
    const wrapper = mount(BFormSelect)
    await waitNT(wrapper.vm) // Auto-ID assigned after mount
    expect(wrapper.attributes('id')).toBeDefined()

    wrapper.destroy()
  })

  it('has user supplied ID attr when id is set', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        id: 'foobar'
      }
    })
    expect(wrapper.attributes('id')).toBeDefined()
    expect(wrapper.attributes('id')).toBe('foobar')

    wrapper.destroy()
  })

  it('does not have attr size by default', async () => {
    const wrapper = mount(BFormSelect)
    expect(wrapper.attributes('size')).not.toBeDefined()

    wrapper.destroy()
  })

  it('does have attr size when plain=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        plain: true
      }
    })
    expect(wrapper.attributes('size')).toBeDefined()
    expect(wrapper.attributes('size')).toBe('0')

    wrapper.destroy()
  })

  it('has class custom-select-sm when size=sm and plain=false', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        size: 'sm'
      }
    })
    expect(wrapper.classes()).toContain('custom-select-sm')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class custom-select-lg when size=lg and plain=false', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        size: 'lg'
      }
    })
    expect(wrapper.classes()).toContain('custom-select-lg')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class custom-select-foo when size=foo and plain=false', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        size: 'foo'
      }
    })
    expect(wrapper.classes()).toContain('custom-select-foo')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class is-invalid and attr aria-invalid="true" when state=false', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        state: false
      }
    })
    expect(wrapper.attributes('aria-invalid')).toBe('true')
    expect(wrapper.classes()).toContain('is-invalid')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class is-invalid and attr aria-invalid="true" when state="invalid"', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        state: 'invalid'
      }
    })
    expect(wrapper.attributes('aria-invalid')).toBe('true')
    expect(wrapper.classes()).toContain('is-invalid')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class is-valid when state=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        state: true
      }
    })
    expect(wrapper.attributes('aria-invalid')).not.toBeDefined()
    expect(wrapper.classes()).toContain('is-valid')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class is-valid when state="valid"', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        state: 'valid'
      }
    })
    expect(wrapper.attributes('aria-invalid')).not.toBeDefined()
    expect(wrapper.classes()).toContain('is-valid')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has attr aria-invalid="true" when aria-invalid="true"', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        ariaInvalid: 'true'
      }
    })
    expect(wrapper.attributes('aria-invalid')).toBe('true')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(1)

    wrapper.destroy()
  })

  it('has attr aria-invalid="true" when aria-invalid=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        ariaInvalid: true
      }
    })
    expect(wrapper.attributes('aria-invalid')).toBe('true')
    expect(wrapper.classes()).toContain('custom-select')
    expect(wrapper.classes().length).toBe(1)

    wrapper.destroy()
  })

  it('has class form-control when plain=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        plain: true
      }
    })
    expect(wrapper.classes()).toContain('form-control')
    expect(wrapper.classes().length).toBe(1)
    expect(wrapper.is('select')).toBe(true)

    wrapper.destroy()
  })

  it('has class form-control-lg when size=lg and plain=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        size: 'lg',
        plain: true
      }
    })
    expect(wrapper.classes()).toContain('form-control-lg')
    expect(wrapper.classes()).toContain('form-control')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class form-control-sm when size=sm and plain=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        size: 'sm',
        plain: true
      }
    })
    expect(wrapper.classes()).toContain('form-control-sm')
    expect(wrapper.classes()).toContain('form-control')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('has class form-control-foo when size=foo and plain=true', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        size: 'foo',
        plain: true
      }
    })
    expect(wrapper.classes()).toContain('form-control-foo')
    expect(wrapper.classes()).toContain('form-control')
    expect(wrapper.classes().length).toBe(2)

    wrapper.destroy()
  })

  it('focus() and blur() methods work', async () => {
    const wrapper = mount(BFormSelect, {
      attachToDocument: true
    })

    expect(document.activeElement).not.toBe(wrapper.element)

    wrapper.vm.focus()
    await waitNT(wrapper.vm)

    expect(document.activeElement).toBe(wrapper.element)

    wrapper.vm.blur()
    await waitNT(wrapper.vm)

    expect(document.activeElement).not.toBe(wrapper.element)

    wrapper.destroy()
  })

  it('has option elements from simple options array', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        options: ['one', 'two', 'three']
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)
    expect($options.at(0).text()).toBe('one')
    expect($options.at(1).text()).toBe('two')
    expect($options.at(2).text()).toBe('three')
    expect($options.at(0).attributes('value')).toBe('one')
    expect($options.at(1).attributes('value')).toBe('two')
    expect($options.at(2).attributes('value')).toBe('three')
    expect($options.is('[disabled]')).toBe(false)

    wrapper.destroy()
  })

  it('has option elements from options array of objects', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        options: [
          { text: 'one', value: 1 },
          { text: 'two', value: 2, disabled: true },
          { text: 'three', value: 3 }
        ]
      }
    })
    const $options = wrapper.findAll('option')

    expect($options.length).toBe(3)
    expect($options.at(0).text()).toBe('one')
    expect($options.at(1).text()).toBe('two')
    expect($options.at(2).text()).toBe('three')
    expect($options.at(0).attributes('value')).toBe('1')
    expect($options.at(1).attributes('value')).toBe('2')
    expect($options.at(2).attributes('value')).toBe('3')
    expect($options.at(0).is('[disabled]')).toBe(false)
    expect($options.at(1).is('[disabled]')).toBe(true)
    expect($options.at(2).is('[disabled]')).toBe(false)

    wrapper.destroy()
  })

  it('has option elements from options legacy object format', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        options: { one: 1, two: { value: 2, text: 'Two' }, three: 'three' }
      }
    })
    const $options = wrapper.findAll('option')

    expect($options.length).toBe(3)
    expect($options.at(0).text()).toBe('1')
    expect($options.at(1).text()).toBe('Two')
    expect($options.at(2).text()).toBe('three')
    expect($options.at(0).attributes('value')).toBe('one')
    expect($options.at(1).attributes('value')).toBe('2')
    expect($options.at(2).attributes('value')).toBe('three')

    wrapper.destroy()
  })

  it('has option elements from default slot', async () => {
    const wrapper = mount(BFormSelect, {
      slots: {
        default: [
          '<option value="1">one</option>',
          '<option value="2">two</option>',
          '<option value="3">three</option>'
        ]
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)

    expect($options.at(0).text()).toBe('one')
    expect($options.at(1).text()).toBe('two')
    expect($options.at(2).text()).toBe('three')
    expect($options.at(0).attributes('value')).toBe('1')
    expect($options.at(1).attributes('value')).toBe('2')
    expect($options.at(2).attributes('value')).toBe('3')
    expect($options.is('[disabled]')).toBe(false)

    wrapper.destroy()
  })

  it('updates v-model when option selected in single mode', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        options: ['one', 'two', 'three']
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)

    expect(wrapper.emitted('input')).not.toBeDefined()
    expect(wrapper.emitted('change')).not.toBeDefined()

    // select 3rd option
    $options.at(2).setSelected()
    await waitNT(wrapper.vm)

    expect(wrapper.emitted('input')).toBeDefined()
    expect(wrapper.emitted('change')).toBeDefined()
    expect(wrapper.emitted('input')[0][0]).toBe('three')
    expect(wrapper.emitted('change')[0][0]).toBe('three')

    wrapper.destroy()
  })

  it('updating v-model (value) when selects correct option', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        options: ['one', 'two', { text: 'three', value: { three: 3 } }],
        value: 'one'
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)

    expect($options.at(0).element.selected).toBe(true)

    // Select 2nd option
    wrapper.setProps({
      value: 'two'
    })

    expect($options.at(1).element.selected).toBe(true)

    // Select 3rd option
    wrapper.setProps({
      value: { three: 3 }
    })

    expect($options.at(2).element.selected).toBe(true)

    wrapper.destroy()
  })

  it('updates v-model when option selected in single mode with complex values', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        options: [
          { text: 'one', value: { a: 1 } },
          { text: 'two', value: { b: 2 } },
          { text: 'three', value: { c: 3 } }
        ]
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)

    expect(wrapper.emitted('input')).not.toBeDefined()
    expect(wrapper.emitted('change')).not.toBeDefined()

    // Select 3rd option
    $options.at(2).setSelected()
    await waitNT(wrapper.vm)

    expect(wrapper.emitted('input')).toBeDefined()
    expect(wrapper.emitted('change')).toBeDefined()
    expect(wrapper.emitted('input')[0][0]).toEqual({ c: 3 })
    expect(wrapper.emitted('change')[0][0]).toEqual({ c: 3 })

    wrapper.destroy()
  })

  it('updates v-model when option selected in multiple mode', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        multiple: true,
        selectSize: 3,
        options: ['one', 'two', 'three'],
        value: []
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)

    expect(wrapper.emitted('input')).not.toBeDefined()
    expect(wrapper.emitted('change')).not.toBeDefined()

    // Select 2nd and 3rd option
    $options.at(1).element.selected = true
    $options.at(2).element.selected = true
    wrapper.trigger('change')
    await waitNT(wrapper.vm)

    expect(wrapper.emitted('input')).toBeDefined()
    expect(wrapper.emitted('change')).toBeDefined()
    expect(wrapper.emitted('input')[0][0]).toEqual(['two', 'three'])
    expect(wrapper.emitted('change')[0][0]).toEqual(['two', 'three'])

    wrapper.destroy()
  })

  it('updates v-model when option selected in multiple mode with complex values', async () => {
    const wrapper = mount(BFormSelect, {
      propsData: {
        multiple: true,
        selectSize: 3,
        value: [],
        options: [
          { text: 'one', value: { a: 1 } },
          { text: 'two', value: { b: 2 } },
          { text: 'three', value: { c: 3 } }
        ]
      }
    })
    const $options = wrapper.findAll('option')
    expect($options.length).toBe(3)

    expect(wrapper.emitted('input')).not.toBeDefined()
    expect(wrapper.emitted('change')).not.toBeDefined()

    // Select 2nd and 3rd option
    $options.at(1).element.selected = true
    $options.at(2).element.selected = true
    wrapper.trigger('change')
    await waitNT(wrapper.vm)

    expect(wrapper.emitted('input')).toBeDefined()
    expect(wrapper.emitted('change')).toBeDefined()
    expect(wrapper.emitted('input')[0][0]).toEqual([{ b: 2 }, { c: 3 }])
    expect(wrapper.emitted('change')[0][0]).toEqual([{ b: 2 }, { c: 3 }])

    wrapper.destroy()
  })

  // These tests are wrapped in a new describe to limit the scope of the getBCR Mock
  describe('prop `autofocus`', () => {
    const origGetBCR = Element.prototype.getBoundingClientRect

    beforeEach(() => {
      // Mock getBCR so that the isVisible(el) test returns true
      // In our test below, all pagination buttons would normally be visible
      Element.prototype.getBoundingClientRect = jest.fn(() => {
        return {
          width: 24,
          height: 24,
          top: 0,
          left: 0,
          bottom: 0,
          right: 0
        }
      })
    })

    afterEach(() => {
      // Restore prototype
      Element.prototype.getBoundingClientRect = origGetBCR
    })

    it('works when true', async () => {
      const wrapper = mount(BFormSelect, {
        attachToDocument: true,
        propsData: {
          autofocus: true,
          options: ['a', 'b', 'c']
        }
      })
      expect(wrapper.vm).toBeDefined()
      await waitNT(wrapper.vm)
      await waitRAF()

      const input = wrapper.find('select')
      expect(input.exists()).toBe(true)
      expect(document).toBeDefined()
      expect(document.activeElement).toBe(input.element)

      wrapper.destroy()
    })

    it('does not autofocus when false', async () => {
      const wrapper = mount(BFormSelect, {
        attachToDocument: true,
        propsData: {
          autofocus: false,
          options: ['a', 'b', 'c']
        }
      })
      expect(wrapper.vm).toBeDefined()
      await waitNT(wrapper.vm)
      await waitRAF()

      const input = wrapper.find('select')
      expect(input.exists()).toBe(true)
      expect(document).toBeDefined()
      expect(document.activeElement).not.toBe(input.element)

      wrapper.destroy()
    })
  })
})