defineSuite([
        'Core/EncodedCartesian3',
        'Core/Cartesian3'
    ], function(
        EncodedCartesian3,
        Cartesian3) {
    'use strict';

    it('construct with default values', function() {
        var encoded = new EncodedCartesian3();
        expect(encoded.high).toEqual(Cartesian3.ZERO);
        expect(encoded.low).toEqual(Cartesian3.ZERO);
    });

    it('endcode encodes a positive value', function() {
        var encoded = EncodedCartesian3.encode(-10000000.0);
        expect(encoded.high + encoded.low).toEqual(-10000000.0);
    });

    it('endcode encodes a negative value', function() {
        var encoded = EncodedCartesian3.encode(10000000.0);
        expect(encoded.high + encoded.low).toEqual(10000000.0);
    });

    it('endcode encodes with a result parameter', function() {
        var result = {
            high : 0.0,
            low : 0.0
        };
        var returnedResult = EncodedCartesian3.encode(0.0, result);
        expect(result).toBe(returnedResult);
        expect(returnedResult.high + returnedResult.low).toEqual(0.0);
    });

    it('fromCartesian encodes a cartesian', function() {
        var c = new Cartesian3(-10000000.0, 0.0, 10000000.0);
        var encoded = EncodedCartesian3.fromCartesian(c);

        // Look mom, no epsilon check.
        expect(encoded.high.x + encoded.low.x).toEqual(-10000000.0);
        expect(encoded.high.y + encoded.low.y).toEqual(0.0);
        expect(encoded.high.z + encoded.low.z).toEqual(10000000.0);
    });

    it('fromCartesian encodes a cartesian with a result parameter', function() {
        var p = new Cartesian3(-10000000.0, 0.0, 10000000.0);
        var encoded = EncodedCartesian3.fromCartesian(p);

        var positions = new Float32Array(6);
        EncodedCartesian3.writeElements(p, positions, 0);

        expect(encoded.high.x).toEqual(positions[0]);
        expect(encoded.high.y).toEqual(positions[1]);
        expect(encoded.high.z).toEqual(positions[2]);
        expect(encoded.low.x).toEqual(positions[3]);
        expect(encoded.low.y).toEqual(positions[4]);
        expect(encoded.low.z).toEqual(positions[5]);
    });

    it('writeElements encodes a cartesian', function() {
        var c = new Cartesian3(-10000000.0, 0.0, 10000000.0);
        var encoded = new EncodedCartesian3();
        var encoded2 = EncodedCartesian3.fromCartesian(c, encoded);

        expect(encoded2).toBe(encoded);
        expect(encoded.high.x + encoded.low.x).toEqual(-10000000.0);
        expect(encoded.high.y + encoded.low.y).toEqual(0.0);
        expect(encoded.high.z + encoded.low.z).toEqual(10000000.0);
    });

    it('encode throws without a value', function() {
        expect(function() {
            EncodedCartesian3.encode();
        }).toThrowDeveloperError();
    });

    it('fromCartesian throws without a cartesian', function() {
        expect(function() {
            EncodedCartesian3.fromCartesian();
        }).toThrowDeveloperError();
    });

    it('writeElements throws without a cartesian', function() {
        expect(function() {
            EncodedCartesian3.writeElements();
        }).toThrowDeveloperError();
    });

    it('writeElements throws without a cartesianArray', function() {
      expect(function() {
          EncodedCartesian3.writeElements(new Cartesian3());
      }).toThrowDeveloperError();
  });

    it('writeElements throws without an index', function() {
      expect(function() {
          EncodedCartesian3.writeElements(new Cartesian3(), new Float32Array(6));
      }).toThrowDeveloperError();
  });

    it('writeElements throws with a negative index', function() {
      expect(function() {
          EncodedCartesian3.writeElements(new Cartesian3(), new Float32Array(6), -1);
      }).toThrowDeveloperError();
  });
});