defineSuite([
        'Scene/UrlTemplateImageryProvider',
        'Core/DefaultProxy',
        'Core/Ellipsoid',
        'Core/GeographicTilingScheme',
        'Core/Math',
        'Core/Rectangle',
        'Core/RequestScheduler',
        'Core/Resource',
        'Core/WebMercatorProjection',
        'Core/WebMercatorTilingScheme',
        'Scene/GetFeatureInfoFormat',
        'Scene/Imagery',
        'Scene/ImageryLayer',
        'Scene/ImageryProvider',
        'Scene/ImageryState',
        'Specs/pollToPromise',
        'ThirdParty/when'
    ], function(
        UrlTemplateImageryProvider,
        DefaultProxy,
        Ellipsoid,
        GeographicTilingScheme,
        CesiumMath,
        Rectangle,
        RequestScheduler,
        Resource,
        WebMercatorProjection,
        WebMercatorTilingScheme,
        GetFeatureInfoFormat,
        Imagery,
        ImageryLayer,
        ImageryProvider,
        ImageryState,
        pollToPromise,
        when) {
    'use strict';

    beforeEach(function() {
        RequestScheduler.clearForSpecs();
    });

    afterEach(function() {
        Resource._Implementations.createImage = Resource._DefaultImplementations.createImage;
    });

    it('conforms to ImageryProvider interface', function() {
        expect(UrlTemplateImageryProvider).toConformToInterface(ImageryProvider);
    });

    it('requires the url to be specified', function() {
        function createWithoutUrl() {
            return new UrlTemplateImageryProvider({});
        }
        expect(createWithoutUrl).toThrowDeveloperError();
    });

    it('resolves readyPromise', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/'
        });

        return provider.readyPromise.then(function(result) {
            expect(result).toBe(true);
            expect(provider.ready).toBe(true);
        });
    });

    it('resolves readyPromise with Resource', function() {
        var resource = new Resource({
            url : 'made/up/tms/server/'
        });

        var provider = new UrlTemplateImageryProvider({
            url: resource
        });

        return provider.readyPromise.then(function(result) {
            expect(result).toBe(true);
            expect(provider.ready).toBe(true);
        });
    });

    it('returns valid value for hasAlphaChannel', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            expect(typeof provider.hasAlphaChannel).toBe('boolean');
        });
    });

    it('requestImage returns a promise for an image and loads it for cross-origin use', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{Z}/{X}/{reverseY}'
        });

        expect(provider.url).toEqual('made/up/tms/server/{Z}/{X}/{reverseY}');

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            expect(provider.tileWidth).toEqual(256);
            expect(provider.tileHeight).toEqual(256);
            expect(provider.maximumLevel).toBeUndefined();
            expect(provider.minimumLevel).toBe(0);
            expect(provider.tilingScheme).toBeInstanceOf(WebMercatorTilingScheme);
            expect(provider.rectangle).toEqual(new WebMercatorTilingScheme().rectangle);

            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(0, 0, 0).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('when no credit is supplied, the provider has no logo', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server'
        });
        expect(provider.credit).toBeUndefined();
    });

    it('turns the supplied credit into a logo', function() {
        var providerWithCredit = new UrlTemplateImageryProvider({
            url: 'made/up/gms/server',
            credit: 'Thanks to our awesome made up source of this imagery!'
        });
        expect(providerWithCredit.credit).toBeDefined();
    });

    it('rectangle passed to constructor does not affect tile numbering', function() {
        var rectangle = new Rectangle(0.1, 0.2, 0.3, 0.4);
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{z}/{x}/{reverseY}',
            rectangle: rectangle
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            expect(provider.tileWidth).toEqual(256);
            expect(provider.tileHeight).toEqual(256);
            expect(provider.maximumLevel).toBeUndefined();
            expect(provider.minimumLevel).toBe(0);
            expect(provider.tilingScheme).toBeInstanceOf(WebMercatorTilingScheme);
            expect(provider.rectangle).toEqualEpsilon(rectangle, CesiumMath.EPSILON14);
            expect(provider.tileDiscardPolicy).toBeUndefined();

            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toContain('/0/0/0');

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(0, 0, 0).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('uses minimumLevel and maximumLevel passed to constructor', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server',
            minimumLevel: 1,
            maximumLevel: 5
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            expect(provider.minimumLevel).toEqual(1);
            expect(provider.maximumLevel).toEqual(5);
        });
    });

    it('raises error event when image cannot be loaded', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server'
        });

        var layer = new ImageryLayer(provider);

        var tries = 0;
        provider.errorEvent.addEventListener(function(error) {
            expect(error.timesRetried).toEqual(tries);
            ++tries;
            if (tries < 3) {
                error.retry = true;
            }
            setTimeout(function() {
                RequestScheduler.update();
            }, 1);
        });

        Resource._Implementations.createImage = function(url, crossOrigin, deferred) {
            if (tries === 2) {
                // Succeed after 2 tries
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            } else {
                // fail
                setTimeout(function() {
                    deferred.reject();
                }, 1);
            }
        };

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            var imagery = new Imagery(layer, 0, 0, 0);
            imagery.addReference();
            layer._requestImagery(imagery);
            RequestScheduler.update();

            return pollToPromise(function() {
                return imagery.state === ImageryState.RECEIVED;
            }).then(function() {
                expect(imagery.image).toBeInstanceOf(Image);
                expect(tries).toEqual(2);
                imagery.releaseReference();
            });
        });
    });

    it('evaluation of pattern X Y reverseX reverseY Z reverseZ', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{z}/{reverseZ}/{reverseY}/{y}/{reverseX}/{x}.PNG',
            tilingScheme: new GeographicTilingScheme(),
            maximumLevel: 6
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqual('made/up/tms/server/2/3/2/1/4/3.PNG');

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluation of schema zero padding for X Y Z as 0000', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{z}/{reverseZ}/{reverseY}/{y}/{reverseX}/{x}.PNG',
            urlSchemeZeroPadding: {
                '{x}'        : '0000',
                '{y}'        : '0000',
                '{z}'        : '0000'
            },
            tilingScheme: new GeographicTilingScheme(),
            maximumLevel: 6
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqual('made/up/tms/server/0002/3/2/0001/4/0003.PNG');

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluation of schema zero padding for reverseX reverseY reverseZ as 0000', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{z}/{reverseZ}/{reverseY}/{y}/{reverseX}/{x}.PNG',
            urlSchemeZeroPadding: {
                '{reverseX}' : '0000',
                '{reverseY}' : '0000',
                '{reverseZ}' : '0000'
            },
            tilingScheme: new GeographicTilingScheme(),
            maximumLevel: 6
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqual('made/up/tms/server/2/0003/0002/1/0004/3.PNG');

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluation of schema zero padding for x y z as 0000 and large x and y', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{z}/{reverseZ}/{reverseY}/{y}/{reverseX}/{x}.PNG',
            urlSchemeZeroPadding: {
                '{x}' : '0000',
                '{y}' : '0000',
                '{z}' : '0000'
            },
            tilingScheme: new GeographicTilingScheme(),
            maximumLevel: 6
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqual('made/up/tms/server/0005/0/21/0010/51/0012.PNG');

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(12, 10, 5).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern northDegrees', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{northDegrees}',
            tilingScheme: new GeographicTilingScheme()
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(45.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern southDegrees', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{southDegrees}',
            tilingScheme: new GeographicTilingScheme()
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(0.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern eastDegrees', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{eastDegrees}',
            tilingScheme: new GeographicTilingScheme()
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(0.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern westDegrees', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{westDegrees}',
            tilingScheme: new GeographicTilingScheme()
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(-45.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern northProjected', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{northProjected}',
            tilingScheme: new WebMercatorTilingScheme()
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(Math.PI * Ellipsoid.WGS84.maximumRadius / 2.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern southProjected', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{southProjected}'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(Math.PI * Ellipsoid.WGS84.maximumRadius / 2.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 0, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern eastProjected', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{eastProjected}'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(-Math.PI * Ellipsoid.WGS84.maximumRadius / 2.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(0, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern westProjected', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{westProjected}'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqualEpsilon(-Math.PI * Ellipsoid.WGS84.maximumRadius / 2.0, CesiumMath.EPSILON11);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(1, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evalutes multiple coordinate patterns', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{westDegrees} {westProjected} {southProjected} {southDegrees} {eastProjected} {eastDegrees} {northDegrees} {northProjected}'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqual(
                    '-90 ' +
                    (-Math.PI * Ellipsoid.WGS84.maximumRadius / 2.0) + ' ' +
                    '0 ' +
                    '0 ' +
                    '0 ' +
                    '0 ' +
                    CesiumMath.toDegrees(WebMercatorProjection.mercatorAngleToGeodeticLatitude(Math.PI / 2)) + ' ' +
                    (Math.PI * Ellipsoid.WGS84.maximumRadius / 2.0));

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(1, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('evaluates pattern s', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{s}'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(['a', 'b', 'c'].indexOf(url)).toBeGreaterThanOrEqualTo(0);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('uses custom subdomain string', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{s}',
            subdomains: '123'
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(['1', '2', '3'].indexOf(url)).toBeGreaterThanOrEqualTo(0);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('uses custom subdomain array', function() {
        var provider = new UrlTemplateImageryProvider({
            url: '{s}',
            subdomains: ['foo', 'bar']
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(['foo', 'bar'].indexOf(url)).toBeGreaterThanOrEqualTo(0);

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    it('uses custom tags', function() {
        var provider = new UrlTemplateImageryProvider({
            url: 'made/up/tms/server/{custom1}/{custom2}/{z}/{y}/{x}.PNG',
            tilingScheme: new GeographicTilingScheme(),
            maximumLevel: 6,
            customTags: {
                custom1: function() { return 'foo';},
                custom2: function() { return 'bar';}
            }
        });

        return pollToPromise(function() {
            return provider.ready;
        }).then(function() {
            spyOn(Resource._Implementations, 'createImage').and.callFake(function(url, crossOrigin, deferred) {
                expect(url).toEqual('made/up/tms/server/foo/bar/2/1/3.PNG');

                // Just return any old image.
                Resource._DefaultImplementations.createImage('Data/Images/Red16x16.png', crossOrigin, deferred);
            });

            return provider.requestImage(3, 1, 2).then(function(image) {
                expect(Resource._Implementations.createImage).toHaveBeenCalled();
                expect(image).toBeInstanceOf(Image);
            });
        });
    });

    describe('pickFeatures', function() {
        it('returns undefined when enablePickFeatures is false', function() {
            var provider = new UrlTemplateImageryProvider({
                url: 'foo/bar',
                pickFeaturesUrl: 'foo/bar',
                getFeatureInfoFormats: [
                    new GetFeatureInfoFormat('json', 'application/json'),
                    new GetFeatureInfoFormat('xml', 'text/xml')
                ],
                enablePickFeatures: false
            });

            return pollToPromise(function() {
                return provider.ready;
            }).then(function() {
                expect(provider.pickFeatures(0, 0, 0, 0.0, 0.0)).toBeUndefined();
            });
        });

        it('does not return undefined when enablePickFeatures is subsequently set to true', function() {
            var provider = new UrlTemplateImageryProvider({
                url: 'foo/bar',
                pickFeaturesUrl: 'foo/bar',
                getFeatureInfoFormats: [
                    new GetFeatureInfoFormat('json', 'application/json'),
                    new GetFeatureInfoFormat('xml', 'text/xml')
                ],
                enablePickFeatures: false
            });

            provider.enablePickFeatures = true;

            return pollToPromise(function() {
                return provider.ready;
            }).then(function() {
                expect(provider.pickFeatures(0, 0, 0, 0.0, 0.0)).not.toBeUndefined();
            });
        });

        it('returns undefined when enablePickFeatures is initialized as true and set to false', function() {
            var provider = new UrlTemplateImageryProvider({
                url: 'foo/bar',
                pickFeaturesUrl: 'foo/bar',
                getFeatureInfoFormats: [
                    new GetFeatureInfoFormat('json', 'application/json'),
                    new GetFeatureInfoFormat('xml', 'text/xml')
                ],
                enablePickFeatures: true
            });

            provider.enablePickFeatures = false;

            return pollToPromise(function() {
                return provider.ready;
            }).then(function() {
                expect(provider.pickFeatures(0, 0, 0, 0.0, 0.0)).toBeUndefined();
            });
        });
    });

    it('throws if tileWidth called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.tileWidth();
        }).toThrowDeveloperError();
    });

    it('throws if tileHeight called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.tileHeight();
        }).toThrowDeveloperError();
    });

    it('throws if maximumLevel called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.maximumLevel();
        }).toThrowDeveloperError();
    });

    it('throws if minimumLevel called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.minimumLevel();
        }).toThrowDeveloperError();
    });

    it('throws if tilingScheme called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.tilingScheme();
        }).toThrowDeveloperError();
    });

    it('throws if rectangle called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.rectangle();
        }).toThrowDeveloperError();
    });

    it('throws if tileDiscardPolicy called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.tileDiscardPolicy();
        }).toThrowDeveloperError();
    });

    it('throws if credit called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.credit();
        }).toThrowDeveloperError();
    });

    it('throws if hasAlphaChannel called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.hasAlphaChannel();
        }).toThrowDeveloperError();
    });

    it('throws if getTileCredits called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.getTileCredits();
        }).toThrowDeveloperError();
    });

    it('throws if requestImage called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.requestImage();
        }).toThrowDeveloperError();
    });

    it('throws if pickFeatures called before provider is ready', function() {
        var provider = new UrlTemplateImageryProvider(when.defer());

        expect(function() {
            return provider.pickFeatures();
        }).toThrowDeveloperError();
    });
});