describe('Line', function() {

var line

beforeEach(function() {

line = draw.line(0,100,100,0)

})

afterEach(function() {

draw.clear()

})

describe('x()', function() {

it('should return the value of x without an argument', function() {

expect(line.x()).toBe(0)

})

it('should set the value of x with the first argument', function() {

line.x(123)

var box = line.bbox()

expect(box.x).toBe(123)

})

})

describe('y()', function() {

it('should return the value of y without an argument', function() {

expect(line.y()).toBe(0)

})

it('should set the value of y with the first argument', function() {

line.y(345)

var box = line.bbox()

expect(box.y).toBe(345)

})

})

describe('cx()', function() {

it('should return the value of cx without an argument', function() {

expect(line.cx()).toBe(50)

})

it('should set the value of cx with the first argument', function() {

line.cx(123)

var box = line.bbox()

expect(box.cx).toBe(123)

})

})

describe('cy()', function() {

it('should return the value of cy without an argument', function() {

expect(line.cy()).toBe(50)

})

it('should set the value of cy with the first argument', function() {

line.cy(345)

var box = line.bbox()

expect(box.cy).toBe(345)

})

})

describe('move()', function() {

it('should set the x and y position', function() {

line.move(123,456)

var box = line.bbox()

expect(box.x).toBe(123)

expect(box.y + box.height).toBe(556)

expect(box.x + box.width).toBe(223)

expect(box.y).toBe(456)

})

})

describe('dx()', function() {

it('moves the x positon of the element relative to the current position', function() {

line.move(50,60)

line.dx(100)

var box = line.bbox()

expect(box.x).toBe(150)

expect(box.y + box.height).toBe(160)

expect(box.x + box.width).toBe(250)

expect(box.y).toBe(60)

})

})

describe('dy()', function() {

it('moves the y positon of the element relative to the current position', function() {

line.move(50, 60)

line.dy(120)

var box = line.bbox()

expect(box.x).toBe(50)

expect(box.y + box.height).toBe(280)

expect(box.x + box.width).toBe(150)

expect(box.y).toBe(180)

})

})

describe('dmove()', function() {

it('moves the x and y positon of the element relative to the current position', function() {

line.move(50,60)

line.dmove(80, 25)

var box = line.bbox()

expect(box.x).toBe(130)

expect(box.y + box.height).toBe(185)

expect(box.x + box.width).toBe(230)

expect(box.y).toBe(85)

})

})

describe('center()', function() {

it('should set the cx and cy position', function() {

line.center(321,567)

var box = line.bbox()

expect(box.x).toBe(271)

expect(box.y + box.height).toBe(617)

expect(box.x + box.width).toBe(371)

expect(box.y).toBe(517)

})

})

describe('width()', function() {

it('sets the width of the element', function() {

line.width(400)

var box = line.bbox()

expect(box.x).toBe(0)

expect(box.x + box.width).toBe(400)

})

it('get the width of the element without argument', function() {

line.width(123)

var box = line.bbox()

expect(line.width()).toBe(box.width)

})

})

describe('height()', function() {

it('sets the height of the element', function() {

line.height(300)

var box = line.bbox()

expect(box.y).toBe(0)

expect(box.y + box.height).toBe(300)

})

it('gets the height of the element without argument', function() {

line.height(456)

var box = line.bbox()

expect(line.height()).toBe(box.height)

})

})

describe('size()', function() {

it('should define the width and height of the element', function() {

line.size(987,654)

var box = line.bbox()

expect(box.x).toBe(0)

expect(box.y + box.height).toBe(654)

expect(box.x + box.width).toBe(987)

expect(box.y).toBe(0)

})

it('defines the width and height proportionally with only the width value given', function() {

var box = line.bbox()

line.size(500)

expect(line.width()).toBe(500)

expect(line.width() / line.height()).toBe(box.width / box.height)

})

it('defines the width and height proportionally with only the height value given', function() {

var box = line.bbox()

line.size(null, 525)

expect(line.height()).toBe(525)

expect(line.width() / line.height()).toBe(box.width / box.height)

})

})

describe('scale()', function() {

it('should scale the element universally with one argument', function() {

var box1 = line.bbox()

, box2 = line.scale(2).bbox()

expect(box2.width).toBe(box1.width * 2)

expect(box2.height).toBe(box1.height * 2)

})

it('should scale the element over individual x and y axes with two arguments', function() {

var box1 = line.bbox()

, box2 = line.scale(2,3.5).bbox()

expect(box2.width).toBe(box1.width * 2)

expect(box2.height).toBe(box1.height * 3.5)

})

})

describe('translate()', function() {

it('should set the translation of an element', function() {

line.transform({ x: 12, y: 12 })

expect(line.node.getAttribute('transform')).toBe('matrix(1,0,0,1,12,12)')

})

})

describe('plot()', function() {

it('should update the start and end points', function() {

line.plot(100,200,300,400)

var box = line.bbox()

expect(box.x).toBe(100)

expect(box.y).toBe(200)

expect(box.x + box.width).toBe(300)

expect(box.y + box.height).toBe(400)

})

})

})