text: /**
   * @author TristanVALCKE / https://github.com/Itee
   * @author moraxy / https://github.com/moraxy
   */
  /* global QUnit */
  
  import { CubicBezierCurve3 } from '../../../../../src/extras/curves/CubicBezierCurve3';
  import { Vector3 } from '../../../../../src/math/Vector3';
  
  export default QUnit.module( 'Extras', () => {
  
  	QUnit.module( 'Curves', () => {
  
  		QUnit.module( 'CubicBezierCurve3', ( hooks ) => {
  
  			let curve = undefined;
  			hooks.before( function () {
  
  				curve = new CubicBezierCurve3(
  					new Vector3( - 10, 0, 2 ),
  					new Vector3( - 5, 15, 4 ),
  					new Vector3( 20, 15, - 5 ),
  					new Vector3( 10, 0, 10 )
  				);
  
  			} );
  
  			// INHERITANCE
  			QUnit.todo( "Extending", ( assert ) => {
  
  				assert.ok( false, "everything's gonna be alright" );
  
  			} );
  
  			// INSTANCING
  			QUnit.todo( "Instancing", ( assert ) => {
  
  				assert.ok( false, "everything's gonna be alright" );
  
  			} );
  
  			// PUBLIC STUFF
  			QUnit.todo( "isCubicBezierCurve3", ( assert ) => {
  
  				assert.ok( false, "everything's gonna be alright" );
  
  			} );
  
  			QUnit.todo( "getPoint", ( assert ) => {
  
  				assert.ok( false, "everything's gonna be alright" );
  
  			} );
  
  			// OTHERS
  			QUnit.test( "Simple curve", ( assert ) => {
  
  				var expectedPoints = [
  					new Vector3( - 10, 0, 2 ),
  					new Vector3( - 3.359375, 8.4375, 1.984375 ),
  					new Vector3( 5.625, 11.25, 1.125 ),
  					new Vector3( 11.796875, 8.4375, 2.703125 ),
  					new Vector3( 10, 0, 10 )
  				];
  
  				var points = curve.getPoints( expectedPoints.length - 1 );
  
  				assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
  				assert.deepEqual( points, expectedPoints, "Correct points calculated" );
  
  				// symmetry
  				var curveRev = new CubicBezierCurve3(
  					curve.v3, curve.v2, curve.v1, curve.v0
  				);
  
  				points = curveRev.getPoints( expectedPoints.length - 1 );
  
  				assert.strictEqual( points.length, expectedPoints.length, "Reversed: Correct number of points" );
  				assert.deepEqual( points, expectedPoints.reverse(), "Reversed: Correct points curve" );
  
  			} );
  
  			QUnit.test( "getLength/getLengths", ( assert ) => {
  
  				var length = curve.getLength();
  				var expectedLength = 39.58103024989427;
  
  				assert.numEqual( length, expectedLength, "Correct length of curve" );
  
  				var expectedLengths = [
  					0,
  					10.73729718231036,
  					20.19074500737662,
  					27.154413277853756,
  					38.453287150114214
  				];
  				var lengths = curve.getLengths( expectedLengths.length - 1 );
  
  				assert.strictEqual( lengths.length, expectedLengths.length, "Correct number of segments" );
  
  				lengths.forEach( function ( segment, i ) {
  
  					assert.numEqual( segment, expectedLengths[ i ], "segment[" + i + "] correct" );
  
  				} );
  
  			} );
  
  			QUnit.test( "getPointAt", ( assert ) => {
  
  				var expectedPoints = [
  					new Vector3( - 10, 0, 2 ),
  					new Vector3( - 2.591880240484318, 8.908333501170798, 1.8953420625251136 ),
  					new Vector3( 4.866251460832755, 11.22787914038507, 1.150832855206874 ),
  					new Vector3( 10, 0, 10 )
  				];
  
  				var points = [
  					curve.getPointAt( 0 ),
  					curve.getPointAt( 0.3 ),
  					curve.getPointAt( 0.5 ),
  					curve.getPointAt( 1 )
  				];
  
  				assert.deepEqual( points, expectedPoints, "Correct points" );
  
  			} );
  
  			QUnit.test( "getTangent/getTangentAt", ( assert ) => {
  
  				var expectedTangents = [
  					new Vector3( 0.3138715439944244, 0.9411440474105875, 0.12542940601858074 ),
  					new Vector3( 0.8351825262580098, 0.54174002562179, - 0.09480449605683638 ),
  					new Vector3( 0.9997531780538501, 0, - 0.02221672728433752 ),
  					new Vector3( 0.40693407933981185, - 0.7512629496079668, 0.5196235518317053 ),
  					new Vector3( - 0.42632467075185815, - 0.6396469221230213, 0.6396085444448543 )
  				];
  
  				var tangents = [
  					curve.getTangent( 0 ),
  					curve.getTangent( 0.25 ),
  					curve.getTangent( 0.5 ),
  					curve.getTangent( 0.75 ),
  					curve.getTangent( 1 )
  				];
  
  				expectedTangents.forEach( function ( exp, i ) {
  
  					var tangent = tangents[ i ];
  
  					assert.numEqual( tangent.x, exp.x, "getTangent #" + i + ": x correct" );
  					assert.numEqual( tangent.y, exp.y, "getTangent #" + i + ": y correct" );
  
  				} );
  
  				//
  
  				expectedTangents = [
  					new Vector3( 0.3138715439944244, 0.9411440474105875, 0.12542940601858074 ),
  					new Vector3( 0.8016539573770751, 0.5918626760037707, - 0.08396133262002324 ),
  					new Vector3( 0.997337559412928, 0.05740742907719314, - 0.044968652092444425 ),
  					new Vector3( 0.1389373097746809, - 0.7882209938358005, 0.5995032016837588 ),
  					new Vector3( - 0.42632467075185815, - 0.6396469221230213, 0.6396085444448543 )
  				];
  
  				tangents = [
  					curve.getTangentAt( 0 ),
  					curve.getTangentAt( 0.25 ),
  					curve.getTangentAt( 0.5 ),
  					curve.getTangentAt( 0.75 ),
  					curve.getTangentAt( 1 )
  				];
  
  				expectedTangents.forEach( function ( exp, i ) {
  
  					var tangent = tangents[ i ];
  
  					assert.numEqual( tangent.x, exp.x, "getTangentAt #" + i + ": x correct" );
  					assert.numEqual( tangent.y, exp.y, "getTangentAt #" + i + ": y correct" );
  
  				} );
  
  			} );
  
  			QUnit.test( "getUtoTmapping", ( assert ) => {
  
  				var start = curve.getUtoTmapping( 0, 0 );
  				var end = curve.getUtoTmapping( 0, curve.getLength() );
  				var somewhere = curve.getUtoTmapping( 0.5, 1 );
  
  				var expectedSomewhere = 0.021163245321323316;
  
  				assert.strictEqual( start, 0, "getUtoTmapping( 0, 0 ) is the starting point" );
  				assert.strictEqual( end, 1, "getUtoTmapping( 0, length ) is the ending point" );
  				assert.numEqual( somewhere, expectedSomewhere, "getUtoTmapping( 0.5, 1 ) is correct" );
  
  			} );
  
  			QUnit.test( "getSpacedPoints", ( assert ) => {
  
  				var expectedPoints = [
  					new Vector3( - 10, 0, 2 ),
  					new Vector3( - 5.756524515061918, 6.568020242700483, 2.22116711170301 ),
  					new Vector3( 1.0003511895116906, 10.49656064587831, 1.4727101010850698 ),
  					new Vector3( 8.767656412295171, 10.784286845278622, 1.2873599519775174 ),
  					new Vector3( 12.306772513558396, 5.545103788071547, 4.909948454535794 ),
  					new Vector3( 10, 0, 10 )
  				];
  
  				var points = curve.getSpacedPoints();
  
  				assert.strictEqual( points.length, expectedPoints.length, "Correct number of points" );
  				assert.deepEqual( points, expectedPoints, "Correct points calculated" );
  
  			} );
  
  			QUnit.test( "computeFrenetFrames", ( assert ) => {
  
  				var expected = {
  					binormals: [
  						new Vector3( - 0.9486358543207215, 0.316370061632252, - 6.938893903907228e-18 ),
  						new Vector3( - 0.05491430765311864, 0.9969838307670049, 0.054842137122173326 ),
  						new Vector3( 0.5944656510461876, 0.334836503700931, 0.7310917216844742 )
  					],
  					normals: [
  						new Vector3( 0.03968210891259515, 0.11898683173537697, - 0.9921025471723304 ),
  						new Vector3( - 0.047981365124836806, 0.05222670079466692, - 0.9974819097732357 ),
  						new Vector3( 0.6818048583242511, - 0.6919077473246573, - 0.23749906180354932 )
  					],
  					tangents: [
  						new Vector3( 0.3138715439944244, 0.9411440474105875, 0.12542940601858074 ),
  						new Vector3( 0.9973375594129282, 0.05740742907719315, - 0.04496865209244443 ),
  						new Vector3( - 0.42632467075185815, - 0.6396469221230213, 0.6396085444448543 )
  					]
  				};
  
  				var frames = curve.computeFrenetFrames( 2, false );
  
  				Object.keys( expected ).forEach( function ( group, i ) {
  
  					expected[ group ].forEach( function ( vec, j ) {
  
  						assert.numEqual( frames[ group ][ j ].x, vec.x, "Frenet frames [" + i + ", " + j + "].x correct" );
  						assert.numEqual( frames[ group ][ j ].y, vec.y, "Frenet frames [" + i + ", " + j + "].y correct" );
  						assert.numEqual( frames[ group ][ j ].z, vec.z, "Frenet frames [" + i + ", " + j + "].z correct" );
  
  					} );
  
  				} );
  
  			} );
  
  		} );
  
  	} );
  
  } );
  