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Viewing file:     gradient.js (5.07 KB)      -rwxrwxr-x

describe('Gradient', function() {
  var rect, gradient

  beforeEach(function() {
    rect = draw.rect(100,100)
    gradient = draw.gradient('linear', function(stop) {
      stop.at({ offset: 0, color: '#333', opacity: 1 })
      stop.at({ offset: 1, color: '#fff', opacity: 1 })
    })
    radial = draw.gradient('radial', function(stop) {
      stop.at({ offset: 0, color: '#333', opacity: 1 })
      stop.at({ offset: 1, color: '#fff', opacity: 1 })
    })
  })

  afterEach(function() {
    rect.remove()
    gradient.remove()
  })

  it('is an instance of SVG.Gradient', function() {
    expect(gradient instanceof SVG.Gradient).toBe(true)
  })

  it('allows creation of a new gradient without block', function() {
    gradient = draw.gradient('linear')
    expect(gradient.children().length).toBe(0)
  })

  describe('fill()', function() {
    it('returns the id of the gradient wrapped in url()', function() {
      expect(gradient.fill()).toBe('url(#' + gradient.attr('id') + ')')
    })
  })
  
  describe('from()', function() {
    it('sets fx and fy attribute for radial gradients', function() {
      radial.from(7, 10)
      expect(radial.attr('fx')).toBe(7)
      expect(radial.attr('fy')).toBe(10)
    })
    it('sets x1 and y1 attribute for linear gradients', function() {
      gradient.from(7, 10)
      expect(gradient.attr('x1')).toBe(7)
      expect(gradient.attr('y1')).toBe(10)
    })
  })
  
  describe('to()', function() {
    it('sets cx and cy attribute for radial gradients', function() {
      radial.to(75, 105)
      expect(radial.attr('cx')).toBe(75)
      expect(radial.attr('cy')).toBe(105)
    })
    it('sets x2 and y2 attribute for linear gradients', function() {
      gradient.to(75, 105)
      expect(gradient.attr('x2')).toBe(75)
      expect(gradient.attr('y2')).toBe(105)
    })
  })

  describe('attr()', function() {
    it('will catch transform attribues and convert them to gradientTransform', function() {
      expect(gradient.translate(100,100).attr('gradientTransform')).toBe('matrix(1,0,0,1,100,100)')
    })
  })

  describe('toString()', function() {
    it('returns the id of the gradient wrapped in url()', function() {
      expect(gradient + '').toBe('url(#' + gradient.attr('id') + ')')
    })
    it('is called when instance is passed as an attribute value', function() {
      rect.attr('fill', gradient)
      expect(rect.attr('fill')).toBe('url(#' + gradient.attr('id') + ')')
    })
  })

  describe('input values', function() {
    var s1, s2

    it('accepts floats', function() {
      gradient = draw.gradient('linear', function(stop) {
        s1 = stop.at({ offset: 0.12, color: '#333', opacity: 1 })
        s2 = stop.at({ offset: 0.93, color: '#fff', opacity: 1 })
      })
      expect(s1.attr('offset')).toBe(0.12)
      expect(s2.attr('offset')).toBe(0.93)
    })
    it('accepts string floats', function() {
      gradient = draw.gradient('linear', function(stop) {
        s1 = stop.at({ offset: '0.13', color: '#333', opacity: 1 })
        s2 = stop.at({ offset: '0.92', color: '#fff', opacity: 1 })
      })
      expect(s1.attr('offset')).toBe(0.13)
      expect(s2.attr('offset')).toBe(0.92)
    })
    it('accept percentages', function() {
      gradient = draw.gradient('linear', function(stop) {
        s1 = stop.at({ offset: '14%', color: '#333', opacity: 1 })
        s2 = stop.at({ offset: '91%', color: '#fff', opacity: 1 })
      })
      expect(s1.attr('offset')).toBe('14%')
      expect(s2.attr('offset')).toBe('91%')
    })
  })

  describe('update()', function() {

    it('removes all existing children first', function() {
      gradient = draw.gradient('linear', function(stop) {
        s1 = stop.at({ offset: 0.12, color: '#333', opacity: 1 })
        s2 = stop.at({ offset: 0.93, color: '#fff', opacity: 1 })
      })
      expect(gradient.children().length).toBe(2)
      gradient.update(function(stop) {
        s1 = stop.at({ offset: 0.33, color: '#666', opacity: 1 })
        s2 = stop.at({ offset: 1, color: '#000', opacity: 1 })
      })
      expect(gradient.children().length).toBe(2)
    })

    it('accepts multiple aruments on fixed positions', function() {
      gradient = draw.gradient('linear', function(stop) {
        s1 = stop.at(0.11, '#333')
        s2 = stop.at(0.94, '#fff', 0.5)
      })
      expect(gradient.children().length).toBe(2)
      expect(s1.attr('offset')).toBe(0.11)
      expect(s1.attr('stop-color')).toBe('#333333')
      expect(s2.attr('offset')).toBe(0.94)
      expect(s2.attr('stop-color')).toBe('#ffffff')
      expect(s2.attr('stop-opacity')).toBe(0.5)
    })

  })

  describe('get()', function() {

    it('returns the stop at a given index', function() {
      gradient = draw.gradient('linear', function(stop) {
        s1 = stop.at({ offset: 0.12, color: '#333', opacity: 1 })
        s2 = stop.at({ offset: 0.93, color: '#fff', opacity: 1 })
      })
      expect(gradient.get(0)).toBe(s1)
      expect(gradient.get(1)).toBe(s2)
      expect(gradient.get(2)).toBeNull()
    })

  })

})