text: /**
   * @author bhouston / http://exocortex.com
   */
  
  QUnit.module( "Vector4" );
  
  QUnit.test( "constructor" , function( assert ) {
  	var a = new THREE.Vector4();
  	assert.ok( a.x == 0, "Passed!" );
  	assert.ok( a.y == 0, "Passed!" );
  	assert.ok( a.z == 0, "Passed!" );
  	assert.ok( a.w == 1, "Passed!" );
  
  	a = new THREE.Vector4( x, y, z, w );
  	assert.ok( a.x === x, "Passed!" );
  	assert.ok( a.y === y, "Passed!" );
  	assert.ok( a.z === z, "Passed!" );
  	assert.ok( a.w === w, "Passed!" );
  });
  
  QUnit.test( "copy" , function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4().copy( a );
  	assert.ok( b.x == x, "Passed!" );
  	assert.ok( b.y == y, "Passed!" );
  	assert.ok( b.z == z, "Passed!" );
  	assert.ok( b.w == w, "Passed!" );
  
  	// ensure that it is a true copy
  	a.x = 0;
  	a.y = -1;
  	a.z = -2;
  	a.w = -3;
  	assert.ok( b.x == x, "Passed!" );
  	assert.ok( b.y == y, "Passed!" );
  	assert.ok( b.z == z, "Passed!" );
  	assert.ok( b.w == w, "Passed!" );
  });
  
  QUnit.test( "set" , function( assert ) {
  	var a = new THREE.Vector4();
  	assert.ok( a.x == 0, "Passed!" );
  	assert.ok( a.y == 0, "Passed!" );
  	assert.ok( a.z == 0, "Passed!" );
  	assert.ok( a.w == 1, "Passed!" );
  
  	a.set( x, y, z, w );
  	assert.ok( a.x == x, "Passed!" );
  	assert.ok( a.y == y, "Passed!" );
  	assert.ok( a.z == z, "Passed!" );
  	assert.ok( a.w == w, "Passed!" );
  });
  
  QUnit.test( "setX,setY,setZ,setW", function( assert ) {
  	var a = new THREE.Vector4();
  	assert.ok( a.x == 0, "Passed!" );
  	assert.ok( a.y == 0, "Passed!" );
  	assert.ok( a.z == 0, "Passed!" );
  	assert.ok( a.w == 1, "Passed!" );
  
  	a.setX( x );
  	a.setY( y );
  	a.setZ( z );
  	a.setW( w );
  
  	assert.ok( a.x == x, "Passed!" );
  	assert.ok( a.y == y, "Passed!" );
  	assert.ok( a.z == z, "Passed!" );
  	assert.ok( a.w == w, "Passed!" );
  });
  
  QUnit.test( "setComponent,getComponent", function( assert ) {
  	var a = new THREE.Vector4();
  	assert.ok( a.x == 0, "Passed!" );
  	assert.ok( a.y == 0, "Passed!" );
  	assert.ok( a.z == 0, "Passed!" );
  	assert.ok( a.w == 1, "Passed!" );
  
  	a.setComponent( 0, 1 );
  	a.setComponent( 1, 2 );
  	a.setComponent( 2, 3 );
  	a.setComponent( 3, 4 );
  	assert.ok( a.getComponent( 0 ) == 1, "Passed!" );
  	assert.ok( a.getComponent( 1 ) == 2, "Passed!" );
  	assert.ok( a.getComponent( 2 ) == 3, "Passed!" );
  	assert.ok( a.getComponent( 3 ) == 4, "Passed!" );
  });
  
  QUnit.test( "add" , function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4( -x, -y, -z, -w );
  
  	a.add( b );
  	assert.ok( a.x == 0, "Passed!" );
  	assert.ok( a.y == 0, "Passed!" );
  	assert.ok( a.z == 0, "Passed!" );
  	assert.ok( a.w == 0, "Passed!" );
  
  	var c = new THREE.Vector4().addVectors( b, b );
  	assert.ok( c.x == -2*x, "Passed!" );
  	assert.ok( c.y == -2*y, "Passed!" );
  	assert.ok( c.z == -2*z, "Passed!" );
  	assert.ok( c.w == -2*w, "Passed!" );
  });
  
  QUnit.test( "sub" , function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4( -x, -y, -z, -w );
  
  	a.sub( b );
  	assert.ok( a.x == 2*x, "Passed!" );
  	assert.ok( a.y == 2*y, "Passed!" );
  	assert.ok( a.z == 2*z, "Passed!" );
  	assert.ok( a.w == 2*w, "Passed!" );
  
  	var c = new THREE.Vector4().subVectors( a, a );
  	assert.ok( c.x == 0, "Passed!" );
  	assert.ok( c.y == 0, "Passed!" );
  	assert.ok( c.z == 0, "Passed!" );
  	assert.ok( c.w == 0, "Passed!" );
  });
  
  QUnit.test( "multiply/divide", function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4( -x, -y, -z, -w );
  
  	a.multiplyScalar( -2 );
  	assert.ok( a.x == x*-2, "Passed!" );
  	assert.ok( a.y == y*-2, "Passed!" );
  	assert.ok( a.z == z*-2, "Passed!" );
  	assert.ok( a.w == w*-2, "Passed!" );
  
  	b.multiplyScalar( -2 );
  	assert.ok( b.x == 2*x, "Passed!" );
  	assert.ok( b.y == 2*y, "Passed!" );
  	assert.ok( b.z == 2*z, "Passed!" );
  	assert.ok( b.w == 2*w, "Passed!" );
  
  	a.divideScalar( -2 );
  	assert.ok( a.x == x, "Passed!" );
  	assert.ok( a.y == y, "Passed!" );
  	assert.ok( a.z == z, "Passed!" );
  	assert.ok( a.w == w, "Passed!" );
  
  	b.divideScalar( -2 );
  	assert.ok( b.x == -x, "Passed!" );
  	assert.ok( b.y == -y, "Passed!" );
  	assert.ok( b.z == -z, "Passed!" );
  	assert.ok( b.w == -w, "Passed!" );
  });
  
  QUnit.test( "min/max/clamp", function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4( -x, -y, -z, -w );
  	var c = new THREE.Vector4();
  
  	c.copy( a ).min( b );
  	assert.ok( c.x == -x, "Passed!" );
  	assert.ok( c.y == -y, "Passed!" );
  	assert.ok( c.z == -z, "Passed!" );
  	assert.ok( c.w == -w, "Passed!" );
  
  	c.copy( a ).max( b );
  	assert.ok( c.x == x, "Passed!" );
  	assert.ok( c.y == y, "Passed!" );
  	assert.ok( c.z == z, "Passed!" );
  	assert.ok( c.w == w, "Passed!" );
  
  	c.set( -2*x, 2*y, -2*z, 2*w );
  	c.clamp( b, a );
  	assert.ok( c.x == -x, "Passed!" );
  	assert.ok( c.y == y, "Passed!" );
  	assert.ok( c.z == -z, "Passed!" );
  	assert.ok( c.w == w, "Passed!" );
  });
  
  QUnit.test( "negate" , function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  
  	a.negate();
  	assert.ok( a.x == -x, "Passed!" );
  	assert.ok( a.y == -y, "Passed!" );
  	assert.ok( a.z == -z, "Passed!" );
  	assert.ok( a.w == -w, "Passed!" );
  });
  
  QUnit.test( "dot" , function( assert ) {
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4( -x, -y, -z, -w );
  	var c = new THREE.Vector4( 0, 0, 0, 0 );
  
  	var result = a.dot( b );
  	assert.ok( result == (-x*x-y*y-z*z-w*w), "Passed!" );
  
  	result = a.dot( c );
  	assert.ok( result == 0, "Passed!" );
  });
  
  QUnit.test( "length/lengthSq", function( assert ) {
  	var a = new THREE.Vector4( x, 0, 0, 0 );
  	var b = new THREE.Vector4( 0, -y, 0, 0 );
  	var c = new THREE.Vector4( 0, 0, z, 0 );
  	var d = new THREE.Vector4( 0, 0, 0, w );
  	var e = new THREE.Vector4( 0, 0, 0, 0 );
  
  	assert.ok( a.length() == x, "Passed!" );
  	assert.ok( a.lengthSq() == x*x, "Passed!" );
  	assert.ok( b.length() == y, "Passed!" );
  	assert.ok( b.lengthSq() == y*y, "Passed!" );
  	assert.ok( c.length() == z, "Passed!" );
  	assert.ok( c.lengthSq() == z*z, "Passed!" );
  	assert.ok( d.length() == w, "Passed!" );
  	assert.ok( d.lengthSq() == w*w, "Passed!" );
  	assert.ok( e.length() == 0, "Passed!" );
  	assert.ok( e.lengthSq() == 0, "Passed!" );
  
  	a.set( x, y, z, w );
  	assert.ok( a.length() == Math.sqrt( x*x + y*y + z*z + w*w ), "Passed!" );
  	assert.ok( a.lengthSq() == ( x*x + y*y + z*z + w*w ), "Passed!" );
  });
  
  QUnit.test( "normalize" , function( assert ) {
  	var a = new THREE.Vector4( x, 0, 0, 0 );
  	var b = new THREE.Vector4( 0, -y, 0, 0 );
  	var c = new THREE.Vector4( 0, 0, z, 0 );
  	var d = new THREE.Vector4( 0, 0, 0, -w );
  
  	a.normalize();
  	assert.ok( a.length() == 1, "Passed!" );
  	assert.ok( a.x == 1, "Passed!" );
  
  	b.normalize();
  	assert.ok( b.length() == 1, "Passed!" );
  	assert.ok( b.y == -1, "Passed!" );
  
  	c.normalize();
  	assert.ok( c.length() == 1, "Passed!" );
  	assert.ok( c.z == 1, "Passed!" );
  
  	d.normalize();
  	assert.ok( d.length() == 1, "Passed!" );
  	assert.ok( d.w == -1, "Passed!" );
  });
  
  /*
  QUnit.test( "distanceTo/distanceToSquared", function() {
  	var a = new THREE.Vector4( x, 0, 0, 0 );
  	var b = new THREE.Vector4( 0, -y, 0, 0 );
  	var c = new THREE.Vector4( 0, 0, z, 0 );
  	var d = new THREE.Vector4( 0, 0, 0, -w );
  	var e = new THREE.Vector4();
  
  	ok( a.distanceTo( e ) == x, "Passed!" );
  	ok( a.distanceToSquared( e ) == x*x, "Passed!" );
  
  	ok( b.distanceTo( e ) == y, "Passed!" );
  	ok( b.distanceToSquared( e ) == y*y, "Passed!" );
  
  	ok( c.distanceTo( e ) == z, "Passed!" );
  	ok( c.distanceToSquared( e ) == z*z, "Passed!" );
  
  	ok( d.distanceTo( e ) == w, "Passed!" );
  	ok( d.distanceToSquared( e ) == w*w, "Passed!" );
  });
  */
  
  
  QUnit.test( "setLength" , function( assert ) {
  	var a = new THREE.Vector4( x, 0, 0, 0 );
  
  	assert.ok( a.length() == x, "Passed!" );
  	a.setLength( y );
  	assert.ok( a.length() == y, "Passed!" );
  
  	a = new THREE.Vector4( 0, 0, 0, 0 );
  	assert.ok( a.length() == 0, "Passed!" );
  	a.setLength( y );
  	assert.ok( a.length() == 0, "Passed!" );
  	a.setLength();
  	assert.ok( isNaN( a.length() ), "Passed!" );
  });
  
  QUnit.test( "lerp/clone", function( assert ) {
  	var a = new THREE.Vector4( x, 0, z, 0 );
  	var b = new THREE.Vector4( 0, -y, 0, -w );
  
  	assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 0.5 ) ), "Passed!" );
  	assert.ok( a.lerp( a, 0 ).equals( a.lerp( a, 1 ) ), "Passed!" );
  
  	assert.ok( a.clone().lerp( b, 0 ).equals( a ), "Passed!" );
  
  	assert.ok( a.clone().lerp( b, 0.5 ).x == x*0.5, "Passed!" );
  	assert.ok( a.clone().lerp( b, 0.5 ).y == -y*0.5, "Passed!" );
  	assert.ok( a.clone().lerp( b, 0.5 ).z == z*0.5, "Passed!" );
  	assert.ok( a.clone().lerp( b, 0.5 ).w == -w*0.5, "Passed!" );
  
  	assert.ok( a.clone().lerp( b, 1 ).equals( b ), "Passed!" );
  });
  
  QUnit.test( "equals" , function( assert ) {
  	var a = new THREE.Vector4( x, 0, z, 0 );
  	var b = new THREE.Vector4( 0, -y, 0, -w );
  
  	assert.ok( a.x != b.x, "Passed!" );
  	assert.ok( a.y != b.y, "Passed!" );
  	assert.ok( a.z != b.z, "Passed!" );
  	assert.ok( a.w != b.w, "Passed!" );
  
  	assert.ok( ! a.equals( b ), "Passed!" );
  	assert.ok( ! b.equals( a ), "Passed!" );
  
  	a.copy( b );
  	assert.ok( a.x == b.x, "Passed!" );
  	assert.ok( a.y == b.y, "Passed!" );
  	assert.ok( a.z == b.z, "Passed!" );
  	assert.ok( a.w == b.w, "Passed!" );
  
  	assert.ok( a.equals( b ), "Passed!" );
  	assert.ok( b.equals( a ), "Passed!" );
  });
  
  QUnit.test( "setComponent/getComponent exceptions", function ( assert ) {
  
  	var a = new THREE.Vector4();
  
  	assert.throws(
  		function () {
  
  			a.setComponent( 4, 0 );
  
  		},
  		/index is out of range/,
  		"setComponent with an out of range index throws Error"
  	);
  	assert.throws(
  		function () {
  
  			a.getComponent( 4 );
  
  		},
  		/index is out of range/,
  		"getComponent with an out of range index throws Error"
  	);
  
  } );
  
  QUnit.test( "lengthManhattan", function ( assert ) {
  
  	var a = new THREE.Vector4( x, 0, 0, 0 );
  	var b = new THREE.Vector4( 0, - y, 0, 0 );
  	var c = new THREE.Vector4( 0, 0, z, 0 );
  	var d = new THREE.Vector4( 0, 0, 0, w );
  	var e = new THREE.Vector4( 0, 0, 0, 0 );
  
  	assert.ok( a.lengthManhattan() == x, "Positive x" );
  	assert.ok( b.lengthManhattan() == y, "Negative y" );
  	assert.ok( c.lengthManhattan() == z, "Positive z" );
  	assert.ok( d.lengthManhattan() == w, "Positive w" );
  	assert.ok( e.lengthManhattan() == 0, "Empty initialization" );
  
  	a.set( x, y, z, w );
  	assert.ok(
  		a.lengthManhattan() == Math.abs( x ) + Math.abs( y ) + Math.abs( z ) + Math.abs( w ),
  		"All components"
  	);
  
  } );
  
  QUnit.test( "setScalar/addScalar/subScalar", function ( assert ) {
  
  	var a = new THREE.Vector4();
  	var s = 3;
  
  	a.setScalar( s );
  	assert.strictEqual( a.x, s, "setScalar: check x" );
  	assert.strictEqual( a.y, s, "setScalar: check y" );
  	assert.strictEqual( a.z, s, "setScalar: check z" );
  	assert.strictEqual( a.w, s, "setScalar: check w" );
  
  	a.addScalar( s );
  	assert.strictEqual( a.x, 2 * s, "addScalar: check x" );
  	assert.strictEqual( a.y, 2 * s, "addScalar: check y" );
  	assert.strictEqual( a.z, 2 * s, "addScalar: check z" );
  	assert.strictEqual( a.w, 2 * s, "addScalar: check w" );
  
  	a.subScalar( 2 * s );
  	assert.strictEqual( a.x, 0, "subScalar: check x" );
  	assert.strictEqual( a.y, 0, "subScalar: check y" );
  	assert.strictEqual( a.z, 0, "subScalar: check z" );
  	assert.strictEqual( a.w, 0, "subScalar: check w" );
  
  } );
  
  QUnit.test( "addScaledVector", function ( assert ) {
  
  	var a = new THREE.Vector4( x, y, z, w );
  	var b = new THREE.Vector4( 6, 7, 8, 9 );
  	var s = 3;
  
  	a.addScaledVector( b, s );
  	assert.strictEqual( a.x, x + b.x * s, "Check x" );
  	assert.strictEqual( a.y, y + b.y * s, "Check y" );
  	assert.strictEqual( a.z, z + b.z * s, "Check z" );
  	assert.strictEqual( a.w, w + b.w * s, "Check w" );
  
  } );
  
  QUnit.test( "applyMatrix4", function ( assert ) {
  
  	var a = new THREE.Vector4( x, y, z, w );
  	var m = new THREE.Matrix4().makeRotationX( Math.PI );
  	var expected = new THREE.Vector4( 2, - 3, - 4, 5 );
  
  	a.applyMatrix4( m );
  	assert.ok( Math.abs( a.x - expected.x ) <= eps, "Rotation matrix: check x" );
  	assert.ok( Math.abs( a.y - expected.y ) <= eps, "Rotation matrix: check y" );
  	assert.ok( Math.abs( a.z - expected.z ) <= eps, "Rotation matrix: check z" );
  	assert.ok( Math.abs( a.w - expected.w ) <= eps, "Rotation matrix: check w" );
  
  	a.set( x, y, z, w );
  	m.makeTranslation( 5, 7, 11 );
  	expected.set( 27, 38, 59, 5 );
  
  	a.applyMatrix4( m );
  	assert.ok( Math.abs( a.x - expected.x ) <= eps, "Translation matrix: check x" );
  	assert.ok( Math.abs( a.y - expected.y ) <= eps, "Translation matrix: check y" );
  	assert.ok( Math.abs( a.z - expected.z ) <= eps, "Translation matrix: check z" );
  	assert.ok( Math.abs( a.w - expected.w ) <= eps, "Translation matrix: check w" );
  
  	a.set( x, y, z, w );
  	m.set( 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0 );
  	expected.set( 2, 3, 4, 4 );
  
  	a.applyMatrix4( m );
  	assert.ok( Math.abs( a.x - expected.x ) <= eps, "Custom matrix: check x" );
  	assert.ok( Math.abs( a.y - expected.y ) <= eps, "Custom matrix: check y" );
  	assert.ok( Math.abs( a.z - expected.z ) <= eps, "Custom matrix: check z" );
  	assert.ok( Math.abs( a.w - expected.w ) <= eps, "Custom matrix: check w" );
  
  	a.set( x, y, z, w );
  	m.set( 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53 );
  	expected.set( 68, 224, 442, 664 );
  
  	a.applyMatrix4( m );
  	assert.ok( Math.abs( a.x - expected.x ) <= eps, "Bogus matrix: check x" );
  	assert.ok( Math.abs( a.y - expected.y ) <= eps, "Bogus matrix: check y" );
  	assert.ok( Math.abs( a.z - expected.z ) <= eps, "Bogus matrix: check z" );
  	assert.ok( Math.abs( a.w - expected.w ) <= eps, "Bogus matrix: check w" );
  
  } );
  
  QUnit.test( "clampScalar", function ( assert ) {
  
  	var a = new THREE.Vector4( - 0.1, 0.01, 0.5, 1.5 );
  	var clamped = new THREE.Vector4( 0.1, 0.1, 0.5, 1.0 );
  
  	a.clampScalar( 0.1, 1.0 );
  	assert.ok( Math.abs( a.x - clamped.x ) <= eps, "Check x" );
  	assert.ok( Math.abs( a.y - clamped.y ) <= eps, "Check y" );
  	assert.ok( Math.abs( a.z - clamped.z ) <= eps, "Check z" );
  	assert.ok( Math.abs( a.w - clamped.w ) <= eps, "Check w" );
  
  } );
  
  QUnit.test( "fromArray", function ( assert ) {
  
  	var a = new THREE.Vector4();
  	var array = [ 1, 2, 3, 4, 5, 6, 7, 8 ];
  
  	a.fromArray( array );
  	assert.strictEqual( a.x, 1, "No offset: check x" );
  	assert.strictEqual( a.y, 2, "No offset: check y" );
  	assert.strictEqual( a.z, 3, "No offset: check z" );
  	assert.strictEqual( a.w, 4, "No offset: check w" );
  
  	a.fromArray( array, 4 );
  	assert.strictEqual( a.x, 5, "With offset: check x" );
  	assert.strictEqual( a.y, 6, "With offset: check y" );
  	assert.strictEqual( a.z, 7, "With offset: check z" );
  	assert.strictEqual( a.w, 8, "With offset: check w" );
  
  } );
  
  QUnit.test( "toArray", function ( assert ) {
  
  	var a = new THREE.Vector4( x, y, z, w );
  
  	var array = a.toArray();
  	assert.strictEqual( array[ 0 ], x, "No array, no offset: check x" );
  	assert.strictEqual( array[ 1 ], y, "No array, no offset: check y" );
  	assert.strictEqual( array[ 2 ], z, "No array, no offset: check z" );
  	assert.strictEqual( array[ 3 ], w, "No array, no offset: check w" );
  
  	array = [];
  	a.toArray( array );
  	assert.strictEqual( array[ 0 ], x, "With array, no offset: check x" );
  	assert.strictEqual( array[ 1 ], y, "With array, no offset: check y" );
  	assert.strictEqual( array[ 2 ], z, "With array, no offset: check z" );
  	assert.strictEqual( array[ 3 ], w, "With array, no offset: check w" );
  
  	array = [];
  	a.toArray( array, 1 );
  	assert.strictEqual( array[ 0 ], undefined, "With array and offset: check [0]" );
  	assert.strictEqual( array[ 1 ], x, "With array and offset: check x" );
  	assert.strictEqual( array[ 2 ], y, "With array and offset: check y" );
  	assert.strictEqual( array[ 3 ], z, "With array and offset: check z" );
  	assert.strictEqual( array[ 4 ], w, "With array and offset: check w" );
  
  } );
  
  QUnit.test( "fromBufferAttribute", function ( assert ) {
  
  	var a = new THREE.Vector4();
  	var attr = new THREE.BufferAttribute( new Float32Array( [ 1, 2, 3, 4, 5, 6, 7, 8 ] ), 4 );
  
  	a.fromBufferAttribute( attr, 0 );
  	assert.strictEqual( a.x, 1, "Offset 0: check x" );
  	assert.strictEqual( a.y, 2, "Offset 0: check y" );
  	assert.strictEqual( a.z, 3, "Offset 0: check z" );
  	assert.strictEqual( a.w, 4, "Offset 0: check w" );
  
  	a.fromBufferAttribute( attr, 1 );
  	assert.strictEqual( a.x, 5, "Offset 1: check x" );
  	assert.strictEqual( a.y, 6, "Offset 1: check y" );
  	assert.strictEqual( a.z, 7, "Offset 1: check z" );
  	assert.strictEqual( a.w, 8, "Offset 1: check w" );
  
  } );
  