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import React from 'react'
import TestUtils from 'react-addons-test-utils'
import Footer from './Footer'
import { SHOW_ALL, SHOW_ACTIVE } from '../constants/TodoFilters'
const setup = propOverrides => {
const props = Object.assign({
completedCount: 0,
activeCount: 0,
filter: SHOW_ALL,
onClearCompleted: jest.fn(),
onShow: jest.fn()
}, propOverrides)
const renderer = TestUtils.createRenderer()
renderer.render(<Footer {...props} />)
const output = renderer.getRenderOutput()
return {
props: props,
output: output
}
}
const getTextContent = elem => {
const children = Array.isArray(elem.props.children) ?
elem.props.children : [ elem.props.children ]
return children.reduce((out, child) =>
// Concatenate the text
// Children are either elements or text strings
out + (child.props ? getTextContent(child) : child)
, '')
}
describe('components', () => {
describe('Footer', () => {
it('should render container', () => {
const { output } = setup()
expect(output.type).toBe('footer')
expect(output.props.className).toBe('footer')
})
it('should display active count when 0', () => {
const { output } = setup({ activeCount: 0 })
const [ count ] = output.props.children
expect(getTextContent(count)).toBe('No items left')
})
it('should display active count when above 0', () => {
const { output } = setup({ activeCount: 1 })
const [ count ] = output.props.children
expect(getTextContent(count)).toBe('1 item left')
})
it('should render filters', () => {
const { output } = setup()
const [ , filters ] = output.props.children
expect(filters.type).toBe('ul')
expect(filters.props.className).toBe('filters')
expect(filters.props.children.length).toBe(3)
filters.props.children.forEach(function checkFilter(filter, i) {
expect(filter.type).toBe('li')
const a = filter.props.children
expect(a.props.className).toBe(i === 0 ? 'selected' : '')
expect(a.props.children).toBe({
0: 'All',
1: 'Active',
2: 'Completed'
}[i])
})
})
it('should call onShow when a filter is clicked', () => {
const { output, props } = setup()
const [ , filters ] = output.props.children
const filterLink = filters.props.children[1].props.children
filterLink.props.onClick({})
expect(props.onShow).toBeCalledWith(SHOW_ACTIVE)
})
it('shouldnt show clear button when no completed todos', () => {
const { output } = setup({ completedCount: 0 })
const [ , , clear ] = output.props.children
expect(clear).toBe(undefined)
})
it('should render clear button when completed todos', () => {
const { output } = setup({ completedCount: 1 })
const [ , , clear ] = output.props.children
expect(clear.type).toBe('button')
expect(clear.props.children).toBe('Clear completed')
})
it('should call onClearCompleted on clear button click', () => {
const { output, props } = setup({ completedCount: 1 })
const [ , , clear ] = output.props.children
clear.props.onClick({})
expect(props.onClearCompleted).toBeCalled()
})
})
})