text: define([
          'DataSources/BillboardGraphics',
          'Core/Cartesian2',
          'Core/Cartesian3',
          'Core/Color',
          'Core/DistanceDisplayCondition',
          'Core/NearFarScalar',
          'DataSources/ConstantProperty',
          'Scene/HeightReference',
          'Scene/HorizontalOrigin',
          'Scene/VerticalOrigin'
      ], function(
          BillboardGraphics,
          Cartesian2,
          Cartesian3,
          Color,
          DistanceDisplayCondition,
          NearFarScalar,
          ConstantProperty,
          HeightReference,
          HorizontalOrigin,
          VerticalOrigin) {
          'use strict';
  
  describe('DataSources/BillboardGraphics', function() {
  
      it('creates expected instance from raw assignment and construction', function() {
          var options = {
              image : '0',
              rotation : 1,
              alignedAxis : Cartesian3.UNIT_Z,
              color : Color.RED,
              heightReference: HeightReference.CLAMP_TO_GROUND,
              horizontalOrigin : HorizontalOrigin.LEFT,
              verticalOrigin : VerticalOrigin.BOTTOM,
              eyeOffset : new Cartesian3(5, 6, 7),
              pixelOffset : new Cartesian2(8, 9),
              scale : 10,
              show : true,
              width : 11,
              height : 12,
              scaleByDistance : new NearFarScalar(13, 14, 15, 16),
              translucencyByDistance : new NearFarScalar(17, 18, 19, 20),
              pixelOffsetScaleByDistance : new NearFarScalar(21, 22, 23, 24),
              sizeInMeters : true,
              distanceDisplayCondition : new DistanceDisplayCondition(10.0, 100.0),
              disableDepthTestDistance : 10.0
          };
  
          var billboard = new BillboardGraphics(options);
          expect(billboard.image).toBeInstanceOf(ConstantProperty);
          expect(billboard.rotation).toBeInstanceOf(ConstantProperty);
          expect(billboard.alignedAxis).toBeInstanceOf(ConstantProperty);
          expect(billboard.color).toBeInstanceOf(ConstantProperty);
          expect(billboard.heightReference).toBeInstanceOf(ConstantProperty);
          expect(billboard.horizontalOrigin).toBeInstanceOf(ConstantProperty);
          expect(billboard.verticalOrigin).toBeInstanceOf(ConstantProperty);
          expect(billboard.eyeOffset).toBeInstanceOf(ConstantProperty);
          expect(billboard.scale).toBeInstanceOf(ConstantProperty);
          expect(billboard.show).toBeInstanceOf(ConstantProperty);
          expect(billboard.width).toBeInstanceOf(ConstantProperty);
          expect(billboard.height).toBeInstanceOf(ConstantProperty);
          expect(billboard.scaleByDistance).toBeInstanceOf(ConstantProperty);
          expect(billboard.translucencyByDistance).toBeInstanceOf(ConstantProperty);
          expect(billboard.pixelOffsetScaleByDistance).toBeInstanceOf(ConstantProperty);
          expect(billboard.sizeInMeters).toBeInstanceOf(ConstantProperty);
          expect(billboard.distanceDisplayCondition).toBeInstanceOf(ConstantProperty);
          expect(billboard.disableDepthTestDistance).toBeInstanceOf(ConstantProperty);
  
          expect(billboard.image.getValue()).toEqual(options.image);
          expect(billboard.rotation.getValue()).toEqual(options.rotation);
          expect(billboard.alignedAxis.getValue()).toEqual(options.alignedAxis);
          expect(billboard.color.getValue()).toEqual(options.color);
          expect(billboard.heightReference.getValue()).toEqual(options.heightReference);
          expect(billboard.horizontalOrigin.getValue()).toEqual(options.horizontalOrigin);
          expect(billboard.verticalOrigin.getValue()).toEqual(options.verticalOrigin);
          expect(billboard.eyeOffset.getValue()).toEqual(options.eyeOffset);
          expect(billboard.scale.getValue()).toEqual(options.scale);
          expect(billboard.show.getValue()).toEqual(options.show);
          expect(billboard.width.getValue()).toEqual(options.width);
          expect(billboard.height.getValue()).toEqual(options.height);
          expect(billboard.scaleByDistance.getValue()).toEqual(options.scaleByDistance);
          expect(billboard.translucencyByDistance.getValue()).toEqual(options.translucencyByDistance);
          expect(billboard.pixelOffsetScaleByDistance.getValue()).toEqual(options.pixelOffsetScaleByDistance);
          expect(billboard.sizeInMeters.getValue()).toEqual(options.sizeInMeters);
          expect(billboard.distanceDisplayCondition.getValue()).toEqual(options.distanceDisplayCondition);
          expect(billboard.disableDepthTestDistance.getValue()).toEqual(options.disableDepthTestDistance);
      });
  
      it('merge assigns unassigned properties', function() {
          var source = new BillboardGraphics();
          source.image = new ConstantProperty('');
          source.imageSubRegion = new ConstantProperty();
          source.rotation = new ConstantProperty(5);
          source.alignedAxis = new ConstantProperty(new Cartesian3());
          source.color = new ConstantProperty(Color.BLACK);
          source.heightReference = new ConstantProperty(HeightReference.CLAMP_TO_GROUND);
          source.horizontalOrigin = new ConstantProperty(HorizontalOrigin.LEFT);
          source.verticalOrigin = new ConstantProperty(VerticalOrigin.BOTTOM);
          source.eyeOffset = new ConstantProperty(Cartesian3.UNIT_Y);
          source.pixelOffset = new ConstantProperty(Cartesian2.UNIT_X);
          source.scale = new ConstantProperty(1);
          source.show = new ConstantProperty(false);
          source.width = new ConstantProperty(24);
          source.height = new ConstantProperty(36);
          source.scaleByDistance = new ConstantProperty(new NearFarScalar());
          source.translucencyByDistance = new ConstantProperty(new NearFarScalar());
          source.pixelOffsetScaleByDistance = new ConstantProperty(new NearFarScalar(1.0, 0.0, 3.0e9, 0.0));
          source.sizeInMeters = new ConstantProperty(true);
          source.distanceDisplayCondition = new ConstantProperty(new DistanceDisplayCondition(10.0, 100.0));
          source.disableDepthTestDistance = 10.0;
  
          var target = new BillboardGraphics();
          target.merge(source);
  
          expect(target.image).toBe(source.image);
          expect(target.imageSubRegion).toBe(source.imageSubRegion);
          expect(target.rotation).toBe(source.rotation);
          expect(target.alignedAxis).toBe(source.alignedAxis);
          expect(target.color).toBe(source.color);
          expect(target.heightReference).toBe(source.heightReference);
          expect(target.horizontalOrigin).toBe(source.horizontalOrigin);
          expect(target.verticalOrigin).toBe(source.verticalOrigin);
          expect(target.eyeOffset).toBe(source.eyeOffset);
          expect(target.pixelOffset).toBe(source.pixelOffset);
          expect(target.scale).toBe(source.scale);
          expect(target.show).toBe(source.show);
          expect(target.width).toBe(source.width);
          expect(target.height).toBe(source.height);
          expect(target.scaleByDistance).toBe(source.scaleByDistance);
          expect(target.translucencyByDistance).toBe(source.translucencyByDistance);
          expect(target.pixelOffsetScaleByDistance).toBe(source.pixelOffsetScaleByDistance);
          expect(target.sizeInMeters).toBe(source.sizeInMeters);
          expect(target.distanceDisplayCondition).toBe(source.distanceDisplayCondition);
          expect(target.disableDepthTestDistance).toBe(source.disableDepthTestDistance);
      });
  
      it('merge does not assign assigned properties', function() {
          var source = new BillboardGraphics();
          source.image = new ConstantProperty('');
          source.imageSubRegion = new ConstantProperty();
          source.rotation = new ConstantProperty(5);
          source.alignedAxis = new ConstantProperty(new Cartesian3());
          source.color = new ConstantProperty(Color.BLACK);
          source.heightReference = new ConstantProperty(HeightReference.CLAMP_TO_GROUND);
          source.horizontalOrigin = new ConstantProperty(HorizontalOrigin.LEFT);
          source.verticalOrigin = new ConstantProperty(VerticalOrigin.BOTTOM);
          source.eyeOffset = new ConstantProperty(Cartesian3.UNIT_Y);
          source.pixelOffset = new ConstantProperty(Cartesian2.UNIT_X);
          source.scale = new ConstantProperty(1);
          source.show = new ConstantProperty(false);
          source.width = new ConstantProperty(24);
          source.height = new ConstantProperty(36);
          source.scaleByDistance = new ConstantProperty(new NearFarScalar());
          source.translucencyByDistance = new ConstantProperty(new NearFarScalar());
          source.pixelOffsetScaleByDistance = new ConstantProperty(new NearFarScalar(1.0, 0.0, 3.0e9, 0.0));
          source.sizeInMeters = new ConstantProperty(true);
          source.distanceDisplayCondition = new ConstantProperty(new DistanceDisplayCondition(10.0, 100.0));
          source.disableDepthTestDistance = new ConstantProperty(10.0);
  
          var image = new ConstantProperty('');
          var imageSubRegion = new ConstantProperty();
          var rotation = new ConstantProperty(5);
          var alignedAxis = new ConstantProperty(new Cartesian3());
          var color = new ConstantProperty(Color.BLACK);
          var heightReference = new ConstantProperty(HeightReference.CLAMP_TO_GROUND);
          var horizontalOrigin = new ConstantProperty(HorizontalOrigin.LEFT);
          var verticalOrigin = new ConstantProperty(VerticalOrigin.BOTTOM);
          var eyeOffset = new ConstantProperty(Cartesian3.UNIT_Y);
          var pixelOffset = new ConstantProperty(Cartesian2.UNIT_X);
          var scale = new ConstantProperty(1);
          var show = new ConstantProperty(false);
          var width = new ConstantProperty(2);
          var height = new ConstantProperty(3);
          var scaleByDistance = new ConstantProperty(new NearFarScalar());
          var translucencyByDistance = new ConstantProperty(new NearFarScalar());
          var pixelOffsetScaleByDistance = new ConstantProperty(new NearFarScalar());
          var sizeInMeters = new ConstantProperty(true);
          var distanceDisplayCondition = new ConstantProperty(new DistanceDisplayCondition());
          var disableDepthTestDistance = new ConstantProperty(10.0);
  
          var target = new BillboardGraphics();
          target.image = image;
          target.imageSubRegion = imageSubRegion;
          target.rotation = rotation;
          target.alignedAxis = alignedAxis;
          target.color = color;
          target.heightReference = heightReference;
          target.horizontalOrigin = horizontalOrigin;
          target.verticalOrigin = verticalOrigin;
          target.eyeOffset = eyeOffset;
          target.pixelOffset = pixelOffset;
          target.scale = scale;
          target.show = show;
          target.width = width;
          target.height = height;
          target.scaleByDistance = scaleByDistance;
          target.translucencyByDistance = translucencyByDistance;
          target.pixelOffsetScaleByDistance = pixelOffsetScaleByDistance;
          target.sizeInMeters = sizeInMeters;
          target.distanceDisplayCondition = distanceDisplayCondition;
          target.disableDepthTestDistance = disableDepthTestDistance;
  
          target.merge(source);
  
          expect(target.image).toBe(image);
          expect(target.imageSubRegion).toBe(imageSubRegion);
          expect(target.rotation).toBe(rotation);
          expect(target.alignedAxis).toBe(alignedAxis);
          expect(target.color).toBe(color);
          expect(target.heightReference).toBe(heightReference);
          expect(target.horizontalOrigin).toBe(horizontalOrigin);
          expect(target.verticalOrigin).toBe(verticalOrigin);
          expect(target.eyeOffset).toBe(eyeOffset);
          expect(target.pixelOffset).toBe(pixelOffset);
          expect(target.scale).toBe(scale);
          expect(target.show).toBe(show);
          expect(target.width).toBe(width);
          expect(target.height).toBe(height);
          expect(target.scaleByDistance).toBe(scaleByDistance);
          expect(target.translucencyByDistance).toBe(translucencyByDistance);
          expect(target.pixelOffsetScaleByDistance).toBe(pixelOffsetScaleByDistance);
          expect(target.sizeInMeters).toBe(sizeInMeters);
          expect(target.distanceDisplayCondition).toBe(distanceDisplayCondition);
          expect(target.disableDepthTestDistance).toBe(disableDepthTestDistance);
      });
  
      it('clone works', function() {
          var source = new BillboardGraphics();
          source.image = new ConstantProperty('');
          source.imageSubRegion = new ConstantProperty();
          source.rotation = new ConstantProperty(5);
          source.alignedAxis = new ConstantProperty(new Cartesian3());
          source.color = new ConstantProperty(Color.BLACK);
          source.heightReference = new ConstantProperty(HeightReference.CLAMP_TO_GROUND);
          source.horizontalOrigin = new ConstantProperty(HorizontalOrigin.LEFT);
          source.verticalOrigin = new ConstantProperty(VerticalOrigin.BOTTOM);
          source.eyeOffset = new ConstantProperty(Cartesian3.UNIT_Y);
          source.pixelOffset = new ConstantProperty(Cartesian2.UNIT_X);
          source.scale = new ConstantProperty(1);
          source.show = new ConstantProperty(false);
          source.width = new ConstantProperty(24);
          source.height = new ConstantProperty(36);
          source.scaleByDistance = new ConstantProperty(new NearFarScalar());
          source.translucencyByDistance = new ConstantProperty(new NearFarScalar());
          source.pixelOffsetScaleByDistance = new ConstantProperty(new NearFarScalar(1.0, 0.0, 3.0e9, 0.0));
          source.sizeInMeters = new ConstantProperty(true);
          source.distanceDisplayCondition = new ConstantProperty(new DistanceDisplayCondition(10.0, 100.0));
          source.disableDepthTestDistance = new ConstantProperty(10.0);
  
          var result = source.clone();
          expect(result.image).toBe(source.image);
          expect(result.imageSubRegion).toBe(source.imageSubRegion);
          expect(result.rotation).toBe(source.rotation);
          expect(result.alignedAxis).toBe(source.alignedAxis);
          expect(result.color).toBe(source.color);
          expect(result.heightReference).toBe(source.heightReference);
          expect(result.horizontalOrigin).toBe(source.horizontalOrigin);
          expect(result.verticalOrigin).toBe(source.verticalOrigin);
          expect(result.eyeOffset).toBe(source.eyeOffset);
          expect(result.pixelOffset).toBe(source.pixelOffset);
          expect(result.scale).toBe(source.scale);
          expect(result.show).toBe(source.show);
          expect(result.width).toBe(source.width);
          expect(result.height).toBe(source.height);
          expect(result.scaleByDistance).toBe(source.scaleByDistance);
          expect(result.translucencyByDistance).toBe(source.translucencyByDistance);
          expect(result.pixelOffsetScaleByDistance).toBe(source.pixelOffsetScaleByDistance);
          expect(result.sizeInMeters).toBe(source.sizeInMeters);
          expect(result.distanceDisplayCondition).toBe(source.distanceDisplayCondition);
          expect(result.disableDepthTestDistance).toBe(source.disableDepthTestDistance);
      });
  
      it('merge throws if source undefined', function() {
          var target = new BillboardGraphics();
          expect(function() {
              target.merge(undefined);
          }).toThrowDeveloperError();
      });
  });
  });
  