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describe('Matrix', function() {
var matrix
describe('initialization', function() {
describe('without a source', function() {
beforeEach(function() {
matrix = new SVG.Matrix
})
it('creates a new matrix with default values', function() {
expect(matrix.a).toBe(1)
expect(matrix.b).toBe(0)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(1)
expect(matrix.e).toBe(0)
expect(matrix.f).toBe(0)
})
describe('toString()' , function() {
it('exports correctly to a string', function() {
expect(matrix.toString()).toBe('matrix(1,0,0,1,0,0)')
})
})
})
describe('with an element given', function() {
var rect
beforeEach(function() {
// Draw is defined in helpers
rect = draw.rect(100, 100)
.transform({
rotate: -10,
translate: [40, 50],
scale: 2,
})
matrix = new SVG.Matrix(rect)
})
it('parses the current transform matrix from an element', function() {
expect(matrix.a).toBeCloseTo(1.969615506024416)
expect(matrix.b).toBeCloseTo(-0.34729635533386066)
expect(matrix.c).toBeCloseTo(0.34729635533386066)
expect(matrix.d).toBeCloseTo(1.969615506024416)
expect(matrix.e).toBeCloseTo(-25.84559306791384)
expect(matrix.f).toBeCloseTo(18.884042465472234)
})
})
describe('with a string given', function() {
it('parses the string value correctly', function() {
var matrix = new SVG.Matrix('2, 0, 0, 2, 100, 50')
expect(matrix.a).toBe(2)
expect(matrix.b).toBe(0)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(2)
expect(matrix.e).toBe(100)
expect(matrix.f).toBe(50)
})
})
describe('with an array given', function() {
it('parses the array correctly', function() {
var matrix = new SVG.Matrix([2, 0, 0, 2, 100, 50])
expect(matrix.a).toBe(2)
expect(matrix.b).toBe(0)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(2)
expect(matrix.e).toBe(100)
expect(matrix.f).toBe(50)
})
})
describe('with an object given', function() {
it('parses the object correctly', function() {
var matrix = new SVG.Matrix({a:2, b:0, c:0, d:2, e:100, f:50})
expect(matrix.a).toBe(2)
expect(matrix.b).toBe(0)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(2)
expect(matrix.e).toBe(100)
expect(matrix.f).toBe(50)
})
})
describe('with 6 arguments given', function() {
it('parses the arguments correctly', function() {
var matrix = new SVG.Matrix(2, 0, 0, 2, 100, 50)
expect(matrix.a).toBe(2)
expect(matrix.b).toBe(0)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(2)
expect(matrix.e).toBe(100)
expect(matrix.f).toBe(50)
})
})
})
describe('compose()', function() {
it('composes a matrix to form the correct result', function() {
var composed = new SVG.Matrix().compose({
scaleX: 3, scaleY: 20, shear: 4, rotate: 50, translateX: 23, translateY: 52,
})
var expected = new SVG.Matrix().scale(3, 20).shear(4).rotate(50).translate(23, 52)
expect(composed).toEqual(expected)
})
})
describe('decompose()', function () {
it('decomposes a matrix properly', function () {
var matrix = new SVG.Matrix().scale(3, 2.5).shear(4).rotate(30).translate(20, 30)
var decomposed = matrix.decompose()
expect(decomposed.scaleX).toBeCloseTo(3)
expect(decomposed.scaleY).toBeCloseTo(2.5)
expect(decomposed.shear).toBeCloseTo(4)
expect(decomposed.rotate).toBeCloseTo(30)
expect(decomposed.translateX).toBeCloseTo(20)
expect(decomposed.translateY).toBeCloseTo(30)
})
it('can be recomposed to the same matrix', function () {
var matrix = new SVG.Matrix().scale(3, 2.5).shear(4).rotate(30).translate(20, 30)
var decomposed = matrix.decompose()
var composed = new SVG.Matrix().compose(decomposed)
expect(matrix.a).toBeCloseTo(composed.a)
expect(matrix.b).toBeCloseTo(composed.b)
expect(matrix.c).toBeCloseTo(composed.c)
expect(matrix.d).toBeCloseTo(composed.d)
expect(matrix.e).toBeCloseTo(composed.e)
expect(matrix.f).toBeCloseTo(composed.f)
})
})
describe('clone()', function() {
it('returns a clone of the matrix', function() {
var matrix = new SVG.Matrix(2, 0, 0, 5, 0, 0)
, clone = matrix.clone()
expect(matrix).not.toBe(clone)
for(var i in 'abcdef') {
expect(matrix[i]).toEqual(clone[i])
}
})
})
describe('morph()', function() {
it('stores a given matrix for morphing', function() {
var matrix1 = new SVG.Matrix(2, 0, 0, 5, 0, 0)
, matrix2 = new SVG.Matrix(1, 0, 0, 1, 4, 3)
matrix1.morph(matrix2)
expect(matrix1.destination).toEqual(matrix2)
})
it('stores a clone, not the given matrix itself', function() {
var matrix1 = new SVG.Matrix(2, 0, 0, 5, 0, 0)
, matrix2 = new SVG.Matrix(1, 0, 0, 1, 4, 3)
matrix1.morph(matrix2)
expect(matrix1.destination).not.toBe(matrix2)
})
})
describe('at()', function() {
it('returns a morphed array at a given position', function() {
var matrix1 = new SVG.Matrix(2, 0, 0, 5, 0, 0)
, matrix2 = new SVG.Matrix(1, 0, 0, 1, 4, 3)
, matrix3 = matrix1.morph(matrix2).at(0.5)
expect(matrix1.toString()).toBe('matrix(2,0,0,5,0,0)')
expect(matrix2.toString()).toBe('matrix(1,0,0,1,4,3)')
expect(matrix3.toString()).toBe('matrix(1.5,0,0,3,2,1.5)')
})
it('returns itself when no destination specified', function() {
var matrix = new SVG.Matrix(2, 0, 0, 5, 0, 0)
expect(matrix.at(0.5)).toBe(matrix)
})
})
describe('multiply()', function() {
it('multiplies two matices', function() {
var matrix1 = new SVG.Matrix(1, 4, 2, 5, 3, 6)
, matrix2 = new SVG.Matrix(7, 8, 8, 7, 9, 6)
, matrix3 = matrix1.multiply(matrix2)
expect(matrix1.toString()).toBe('matrix(1,4,2,5,3,6)')
expect(matrix2.toString()).toBe('matrix(7,8,8,7,9,6)')
expect(matrix3.toString()).toBe('matrix(23,68,22,67,24,72)')
})
it('accepts matrices in any form', function() {
var matrix1 = new SVG.Matrix(1, 4, 2, 5, 3, 6)
, matrix2 = matrix1.multiply('7,8,8,7,9,6')
expect(matrix1.toString()).toBe('matrix(1,4,2,5,3,6)')
expect(matrix2.toString()).toBe('matrix(23,68,22,67,24,72)')
})
})
describe('inverse()', function() {
it('inverses matrix', function() {
var matrix1 = new SVG.Matrix(2, 0, 0, 5, 4, 3)
, matrix2 = matrix1.inverse()
, abcdef = [0.5,0,0,0.2,-2,-0.6]
expect(matrix1.toString()).toBe('matrix(2,0,0,5,4,3)')
for(var i in 'abcdef') {
expect(matrix2['abcdef'[i]]).toBeCloseTo(abcdef[i])
}
})
})
describe('translate()', function() {
it('translates matrix by given x and y values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).translate(10, 12.5)
expect(matrix.e).toBe(14)
expect(matrix.f).toBe(15.5)
})
it('does nothing if you give it no x or y value', function() {
var matrix = new SVG.Matrix(1, 2, 3, 4, 5, 6).translate()
expect(matrix.e).toBe(5)
expect(matrix.f).toBe(6)
})
})
describe('scale()', function() {
it('performs a uniformal scale with one value', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).scale(3)
expect(matrix.a).toBe(3)
expect(matrix.d).toBe(3)
expect(matrix.e).toBe(4 * 3)
expect(matrix.f).toBe(3 * 3)
})
it('performs a non-uniformal scale with two values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).scale(2.5, 3.5)
expect(matrix.a).toBe(2.5)
expect(matrix.d).toBe(3.5)
expect(matrix.e).toBe(4 * 2.5)
expect(matrix.f).toBe(3 * 3.5)
})
it('performs a uniformal scale at a given center point with three values', function() {
var matrix = new SVG.Matrix(1, 3, 2, 3, 4, 3).scale(3, 2, 3)
expect(matrix.a).toBe(3)
expect(matrix.b).toBe(9)
expect(matrix.c).toBe(6)
expect(matrix.d).toBe(9)
expect(matrix.e).toBe(8)
expect(matrix.f).toBe(3)
})
it('performs a non-uniformal scale at a given center point with four values', function() {
var matrix = new SVG.Matrix(1, 3, 2, 3, 4, 3).scale(3, 2, 2, 3)
expect(matrix.a).toBe(3)
expect(matrix.b).toBe(6)
expect(matrix.c).toBe(6)
expect(matrix.d).toBe(6)
expect(matrix.e).toBe(8)
expect(matrix.f).toBe(3)
})
})
describe('rotate()', function() {
it('performs a rotation with one argument', function() {
var matrix = new SVG.Matrix(1, 3, 2, 3, 4, 3).rotate(30)
expect(matrix.a).toBeCloseTo(-0.6339746)
expect(matrix.b).toBeCloseTo(3.09807621)
expect(matrix.c).toBeCloseTo(0.23205081)
expect(matrix.d).toBeCloseTo(3.59807621)
expect(matrix.e).toBeCloseTo(1.96410162)
expect(matrix.f).toBeCloseTo(4.59807621)
})
it('performs a rotation around a given point with three arguments', function() {
var matrix = new SVG.Matrix(1, 3, 2, 3, 4, 3).rotate(30, 2, 3)
expect(matrix.a).toBeCloseTo(-0.633974596216)
expect(matrix.b).toBeCloseTo(3.09807621135)
expect(matrix.c).toBeCloseTo(0.232050807569)
expect(matrix.d).toBeCloseTo(3.59807621135)
expect(matrix.e).toBeCloseTo(3.73205080757)
expect(matrix.f).toBeCloseTo(4.0)
})
})
describe('flip()', function() {
describe('with x given', function() {
it('performs a flip over the horizontal axis with one argument', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip('x')
expect(matrix.a).toBe(-1)
expect(matrix.d).toBe(1)
expect(matrix.e).toBe(-4)
expect(matrix.f).toBe(3)
})
it('performs a flip over the horizontal axis over a given point with two arguments', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip('x', 150)
expect(matrix.a).toBe(-1)
expect(matrix.d).toBe(1)
expect(matrix.e).toBe(296)
expect(matrix.f).toBe(3)
})
})
describe('with y given', function() {
it('performs a flip over the vertical axis with one argument', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip('y')
expect(matrix.a).toBe(1)
expect(matrix.d).toBe(-1)
expect(matrix.e).toBe(4)
expect(matrix.f).toBe(-3)
})
it('performs a flip over the vertical axis over a given point with two arguments', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip('y', 100)
expect(matrix.a).toBe(1)
expect(matrix.d).toBe(-1)
expect(matrix.e).toBe(4)
expect(matrix.f).toBe(197)
})
})
describe('with no axis given', function() {
it('performs a flip over the horizontal and vertical axis with no argument', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip()
expect(matrix.a).toBe(-1)
expect(matrix.d).toBe(-1)
expect(matrix.e).toBe(-4)
expect(matrix.f).toBe(-3)
})
it('performs a flip over the horizontal and vertical axis over a given point with one argument that represent both coordinates', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip(100)
expect(matrix.a).toBe(-1)
expect(matrix.d).toBe(-1)
expect(matrix.e).toBe(196)
expect(matrix.f).toBe(197)
})
it('performs a flip over the horizontal and vertical axis over a given point with two arguments', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).flip(50, 100)
expect(matrix.a).toBe(-1)
expect(matrix.d).toBe(-1)
expect(matrix.e).toBe(96)
expect(matrix.f).toBe(197)
})
})
})
describe('skew()', function() {
it('performs a uniformal skew with one value', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skew(30)
expect(matrix.a).toBe(1)
expect(matrix.b).toBeCloseTo(0.57735026919)
expect(matrix.c).toBeCloseTo(0.57735026919)
expect(matrix.d).toBe(1)
expect(matrix.e).toBeCloseTo(5.73205080757)
expect(matrix.f).toBeCloseTo(5.30940107676)
})
it('performs a non-uniformal skew with two values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skew(30, 20)
expect(matrix.a).toBe(1)
expect(matrix.b).toBeCloseTo(0.363970234266)
expect(matrix.c).toBeCloseTo(0.57735026919)
expect(matrix.d).toBe(1)
expect(matrix.e).toBeCloseTo(5.73205080757)
expect(matrix.f).toBeCloseTo(4.45588093706)
})
it('performs a uniformal skew at a given center point with three values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skew(30, 150, 100)
expect(matrix.a).toBe(1)
expect(matrix.b).toBeCloseTo(0.57735026919)
expect(matrix.c).toBeCloseTo(0.57735026919)
expect(matrix.d).toBe(1)
expect(matrix.e).toBeCloseTo(-52.0029761114)
expect(matrix.f).toBeCloseTo(-81.2931393017)
})
it('performs a non-uniformal skew at a given center point with four values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skew(30, 20, 150, 100)
expect(matrix.a).toBe(1.0)
expect(matrix.b).toBeCloseTo(0.363970234266)
expect(matrix.c).toBeCloseTo(0.57735026919)
expect(matrix.d).toBe(1.0)
expect(matrix.e).toBeCloseTo(-52.0029761114)
expect(matrix.f).toBeCloseTo(-50.1396542029)
})
it('can be chained', function(){
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skew(20, 30).skew(30, 20)
expect(matrix.a).toBeCloseTo(1.33333333333)
expect(matrix.b).toBeCloseTo(0.941320503456)
expect(matrix.c).toBeCloseTo(0.941320503456)
expect(matrix.d).toBeCloseTo(1.13247433143)
expect(matrix.e).toBeCloseTo(8.1572948437)
expect(matrix.f).toBeCloseTo(7.16270500812)
})
})
describe('skewX', function(){
it('performs a skew along the x axis with one value', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skewX(30)
expect(matrix.a).toBe(1)
expect(matrix.b).toBe(0)
expect(matrix.c).toBeCloseTo(0.57735026919)
expect(matrix.d).toBe(1)
expect(matrix.e).toBeCloseTo(5.73205080757)
expect(matrix.f).toBe(3)
})
it('performs a skew along the x axis at a given center point with three values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skewX(30, 150, 100)
expect(matrix.a).toBe(1)
expect(matrix.b).toBe(0)
expect(matrix.c).toBeCloseTo(0.57735026919)
expect(matrix.d).toBe(1)
expect(matrix.e).toBeCloseTo(-52.0029761114)
expect(matrix.f).toBe(3)
})
})
describe('skewY', function(){
it('performs a skew along the y axis with one value', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skewY(30)
expect(matrix.a).toBe(1)
expect(matrix.b).toBeCloseTo(0.57735026919)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(1)
expect(matrix.e).toBe(4)
expect(matrix.f).toBeCloseTo(5.30940107676)
})
it('performs a skew along the y axis at a given center point with three values', function() {
var matrix = new SVG.Matrix(1, 0, 0, 1, 4, 3).skewY(30, 150, 100)
expect(matrix.a).toBe(1)
expect(matrix.b).toBeCloseTo(0.57735026919)
expect(matrix.c).toBe(0)
expect(matrix.d).toBe(1)
expect(matrix.e).toBe(4)
expect(matrix.f).toBeCloseTo(-81.2931393017)
})
})
describe('native()', function() {
it('returns the node reference', function() {
expect(new SVG.Matrix().native() instanceof window.SVGMatrix).toBeTruthy()
})
})
})
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