var assert = (
    global && global.chai
    ? global.chai.assert
    : require('chai').assert
  )
  , SVGPathData = (
    global && global.SVGPathData
    ? global.SVGPathData
    : require(__dirname + '/../src/SVGPathData.js')
  )
;

describe("Positive rotate from the origin", function() {

  it("should fail with no args", function() {
    assert.throws(function() {
      new SVGPathData(
        'm20,30l10,10z'
      ).rotate().encode();
    }, 'A rotate transformation requires the parameter a'
      +' to be set and to be a number.');
  });

  it("should work with relative horinzontal path", function() {
    assert.equal(new SVGPathData(
      'm10 0l60 0z'
    ).rotate(Math.PI).round(6).encode(),
      'm-10 0l-60 0z');
  });

  it("should work with relative vertical path", function() {
    assert.equal(new SVGPathData(
      'm0 10l0 60z'
    ).rotate(Math.PI).round(6).encode(),
      'm0 -10l0 -60z');
  });

  it("should work with relative path", function() {
    assert.equal(new SVGPathData(
      'm75 100l0 -50z'
    ).rotate(Math.PI).round(6).encode(),
      'm-75 -100l0 50z');
  });

  it("should work with absolute path", function() {
    assert.equal(new SVGPathData(
      'M75,100L75,50z'
    ).rotate(Math.PI).round(6).encode(),
      'M-75 -100L-75 -50z');
  });

});

describe("Positive rotate", function() {

  it("should work with relative path (Math.PI)", function() {
    assert.equal(new SVGPathData(
      'm100 100l100 100z'
    ).rotate(Math.PI, 150, 150).round(6).encode(),
      'm200 200l-100 -100z');
  });

  it("should work with relative path (Math.PI/2)", function() {
    assert.equal(new SVGPathData(
      'm100 100l100 100z'
    ).rotate(Math.PI/2, 150, 150).round(6).encode(),
      'm200 100l-100 100z');
  });

  it("should work with relative path", function() {
    assert.equal(new SVGPathData(
      'm75 100l0 -50z'
    ).rotate(Math.PI, 75, 75).round(6).encode(),
      'm75 50l0 50z');
  });

  it("should work with absolute path", function() {
    assert.equal(new SVGPathData(
      'M75,100L75,50z'
    ).rotate(Math.PI, 75, 75).round(6).encode(),
      'M75 50L75 100z');
  });

});

describe("360° Positive rotate", function() {

  it("should work with relative path", function() {
    assert.equal(new SVGPathData(
      'm100 75l-50 -45l0 90z'
    ).rotate(2*Math.PI, 75, 75).round(6).encode(),
      'm100 75l-50 -45l0 90z');
  });

  it("should work with absolute path", function() {
    assert.equal(new SVGPathData(
      'M 100,75L50,30L50,120 z'
    ).rotate(2*Math.PI, 75, 75).round(6).encode(),
      'M100 75L50 30L50 120z');
  });

});