File: Vector.html

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<html>
<head>
<script src="../OLLoader.js"></script>
  <script type="text/javascript">

    var name = "Vector Layer";
    
    function test_Layer_Vector_constructor(t) {
        t.plan(5);

        var options = {protocol: new OpenLayers.Protocol(), 
                       strategies: [new OpenLayers.Strategy(), new OpenLayers.Strategy()]}
        var layer = new OpenLayers.Layer.Vector(name, options);

        t.ok(layer instanceof OpenLayers.Layer.Vector, "new OpenLayers.Layer.Vector returns correct object" );
        t.eq(layer.name, name, "layer name is correctly set");
        t.ok(layer.renderer.CLASS_NAME, "layer has a renderer");
        
        t.ok((layer.name == layer.strategies[0].layer.name) &&
             (layer.strategies[0].layer.name == layer.strategies[1].layer.name), 
             "setLayer was called on strategies");

       options.renderers = [OpenLayers.Renderer.SVG, OpenLayers.Renderer.VML, OpenLayers.Renderer.Canvas]; 
       layer.destroy(); 
       layer = new OpenLayers.Layer.Vector(name, options); 
       t.ok(layer.renderer.CLASS_NAME, "layer has a renderer when providing a function"); 
       layer.destroy(); 
    }

    function test_Layer_Vector_assignRenderer(t) { 
        t.plan(2);
 
        // create a dummy class in the global name space 
        My = { 
            Custom: { 
                Renderer: { 
                    Supported: OpenLayers.Class(OpenLayers.Renderer, { 
                        supported: OpenLayers.Function.True, 
                        CLASS_NAME: 'My.Custom.Renderer.Supported' 
                    }), 
                    NotSupported: OpenLayers.Class(OpenLayers.Renderer, { 
                        supported: OpenLayers.Function.False, 
                        CLASS_NAME: 'My.Custom.Renderer.NotSupported' 
                    }) 
                } 
            } 
        }; 
        var layer = new OpenLayers.Layer.Vector('vector', { 
            renderers: [My.Custom.Renderer.NotSupported, 
                My.Custom.Renderer.Supported, 
                OpenLayers.Renderer.Canvas] 
        }); 
        t.eq(layer.renderer.CLASS_NAME, 'My.Custom.Renderer.Supported',  
            'layer has a valid renderer'); 
 
        var layer = new OpenLayers.Layer.Vector('vector', { 
            renderers: ['SVG', 'VML', 'Canvas', My.Custom.Renderer.Supported] 
        }); 
        t.ok(layer.renderer.CLASS_NAME != 'My.Custom.Renderer.Supported',  
            'renderers can be strings as well'); 
    }

    function test_Layer_Vector_refresh(t) {
        t.plan(4);

        var obj = {"an": "object"};

        var log;
        var layer = new OpenLayers.Layer.Vector(name, {
            eventListeners: {
                refresh: function(o) {
                    log.obj = o;
                }
            }
        });
        inRange = false;
        layer.calculateInRange = function() {
            return inRange;
        };

        log = {};
        inRange = false;
        layer.visibility = false;
        layer.refresh(obj);
        t.eq(log.obj, undefined, "[false, false] refresh not triggered");

        log = {};
        inRange = true;
        layer.visibility = false;
        layer.refresh(obj);
        t.eq(log.obj, undefined, "[true, false] refresh not triggered");

        log = {};
        inRange = false;
        layer.visibility = true;
        layer.refresh(obj);
        t.eq(log.obj, undefined, "[false, true] refresh not triggered");

        log = {};
        inRange = true;
        layer.visibility = true;
        layer.refresh(obj);
        t.ok(log.obj === obj, "[true, true] refresh triggered with correct arg");
    }
    
    function test_Layer_Vector_addFeatures(t) {
        t.plan(8);
    
        var layer = new OpenLayers.Layer.Vector(name);

        var point = new OpenLayers.Geometry.Point(-111.04, 45.68);
        var pointFeature = new OpenLayers.Feature.Vector(point);

        layer.preFeatureInsert = function(feature) {
            t.ok(feature == pointFeature, "OpenLayers.Layer.Vector.addFeatures calls preFeatureInsert with the right arg");
        };
        layer.onFeatureInsert = function(feature) {
            t.ok(feature == pointFeature, "OpenLayers.Layer.Vector.addFeatures calls onFeatureInsert with the right arg");
        };
        layer.events.register('beforefeatureadded', null, function(obj) {
            t.ok(pointFeature == obj.feature, "OpenLayers.Layer.Vector.addFeatures triggers beforefeatureadded with correct feature passed to callback");
        });
        layer.events.register('featureadded', null, function(obj) {
            t.ok(pointFeature == obj.feature, "OpenLayers.Layer.Vector.addFeatures triggers featureadded with correct feature passed to callback");
        });
        layer.events.register('featuresadded', null, function(obj) {
            t.ok(pointFeature == obj.features[0], "OpenLayers.Layer.Vector.addFeatures triggers featuresadded with correct features passed to callback");
        });

        layer.addFeatures([pointFeature]);
        
        t.eq(layer.features.length, 1, "OpenLayers.Layer.Vector.addFeatures adds something to the array");
        t.ok(layer.features[0] == pointFeature, "OpenLayers.Layer.Vector.addFeatures returns an array of features");

        layer.preFeatureInsert = function(feature) {
            t.fail("OpenLayers.Layer.Vector.addFeatures calls preFeatureInsert while it must not");
        };
        layer.onFeatureInsert = function(feature) {
            t.fail("OpenLayers.Layer.Vector.addFeatures calls onFeatureInsert while it must not");
        };
        layer.events.register('beforefeatureadded', null, function(obj) {
            t.fail("OpenLayers.Layer.Vector.addFeatures triggers beforefeatureadded while it must not");
        });
        layer.events.register('featureadded', null, function(obj) {
            t.fail("OpenLayers.Layer.Vector.addFeatures triggers featureadded while it must not");
        });
        layer.events.register('featuresadded', null, function(obj) {
            t.fail("OpenLayers.Layer.Vector.addFeatures triggers featuresadded while it must not");
        });

        layer.addFeatures([pointFeature], {silent: true});

        var extent = layer.getDataExtent();
        t.eq(extent.toBBOX(), "-111.04,45.68,-111.04,45.68", "extent from getDataExtent is correct");
    }

    function test_Layer_Vector_getFeature(t) {
        t.plan(13);

        var layer = new OpenLayers.Layer.Vector(name);
        var feature = new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(-111.04, 45.68));

        t.ok(layer.getFeatureById(feature.id) == null,
             "OpenLayers.Layer.Vector.getFeatureById returns null while the layer is empty");
        t.ok(layer.getFeatureByFid('my_fid') == null,
             "OpenLayers.Layer.Vector.getFeatureByFid returns null while the layer is empty");

        layer.addFeatures([feature]);

        t.ok(layer.getFeatureByFid('my_fid') == null,
             "OpenLayers.Layer.Vector.getFeatureByFid returns null on unset feature fid");

        feature.fid = 'my_fid';

        t.ok(layer.getFeatureById(feature.id) == feature,
             "OpenLayers.Layer.Vector.getFeatureById returns the correct feature");
        t.ok(layer.getFeatureByFid(feature.fid) == feature,
             "OpenLayers.Layer.Vector.getFeatureByFid returns the correct feature");
        t.ok(layer.getFeatureById('some_id_that_does_not_exist') == null,
             "OpenLayers.Layer.Vector.getFeatureById returns null on non-existing feature id");
        t.ok(layer.getFeatureByFid('some_fid_that_does_not_exist') == null,
             "OpenLayers.Layer.Vector.getFeatureByFid returns null on non-existing feature fid");
        t.ok(layer.getFeatureById(feature.fid) == null,
             "OpenLayers.Layer.Vector.getFeatureById ignores the feature fid");
        t.ok(layer.getFeatureByFid(feature.id) == null,
             "OpenLayers.Layer.Vector.getFeatureByFid ignores the feature id");

        t.ok(layer.getFeatureBy('id', feature.id) == feature,
             "OpenLayers.Layer.Vector.getFeatureBy('id', ...) works like getFeatureById on existing feature id");
        t.ok(layer.getFeatureBy('id', 'some_id_that_does_not_exist') == null,
             "OpenLayers.Layer.Vector.getFeatureBy('id', ...) works like getFeatureById on non-existing feature id");
        t.ok(layer.getFeatureBy('fid', feature.fid) == feature,
             "OpenLayers.Layer.Vector.getFeatureBy('fid', ...) works like getFeatureByFid on existing feature fid");
        t.ok(layer.getFeatureBy('fid', 'some_fid_that_does_not_exist') == null,
             "OpenLayers.Layer.Vector.getFeatureBy('fid', ...) works like getFeatureByFid on non-existing feature fid");
    }
    
    function test_Layer_Vector_getFeaturesByAttribute(t) {
        t.plan( 9 );
        // setup layer
        var layer = new OpenLayers.Layer.Vector(name);
        
        // feature_1
        var geometry_1 = new OpenLayers.Geometry.Point(-28.63, 153.64);
        var attributes_1 = {
            humpty: 'dumpty',
            clazz: 1
        };
        var feature_1 = new OpenLayers.Feature.Vector(geometry_1, attributes_1);
        feature_1.fid = 'f_01'; // to identify later
        
        // feature_2
        var geometry_2 = new OpenLayers.Geometry.Point(-27.48, 153.05);
        var attributes_2 = {
            // this feature has attribute humpty === undefined
            clazz: '1'
        };
        var feature_2 = new OpenLayers.Feature.Vector(geometry_2, attributes_2);
        feature_2.fid = 'f_02'; // to identify later
        
        // feature_3
        var geometry_3 = new OpenLayers.Geometry.Point(-33.74, 150.3);
        var attributes_3 = {
            humpty: 'foobar',
            clazz: 1
        };
        var feature_3 = new OpenLayers.Feature.Vector(geometry_3, attributes_3);
        feature_3.fid = 'f_03'; // to identify later
        
        // Tests
        
        // don't find anything... no features added
        // 1 test
        t.ok(layer.getFeaturesByAttribute('humpty', 'dumpty').length === 0,
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns an empty array while the layer is empty");
        
        layer.addFeatures([feature_1, feature_2, feature_3]);
        
        // simple use case: find 1 feature with an attribute and matching value
        // 2 tests
        var dumptyResults = layer.getFeaturesByAttribute('humpty', 'dumpty');
        t.ok(dumptyResults.length === 1,
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns an array with one feature for attribute 'humpty' with value 'dumpty'");
        t.ok(dumptyResults[0].fid === 'f_01',
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns the correct feature with attribute 'humpty' set to 'dumpty'");
        
        // simple use case: find 1 feature with an attribute and matching value
        //                  and respect data types
        // 2 tests
        var strOneResults = layer.getFeaturesByAttribute('clazz', '1');
        t.ok(strOneResults.length === 1,
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns an array with one feature for attribute 'clazz' with value '1' (a string)");
        t.ok(strOneResults[0].fid === 'f_02',
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns the correct feature with attribute 'clazz' set to the string '1'");
        
        // simple use case: find 2 features with an attribute and matching value
        //                  and respect data types
        // 2 tests    
        var numOneResults = layer.getFeaturesByAttribute('clazz', 1);
        t.ok(numOneResults.length === 2,
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns an array with two features for attribute 'clazz' with value 1 (a number)");
        var bothFound = !!((numOneResults[0].fid === 'f_01' && numOneResults[1].fid === 'f_03') || (numOneResults[0].fid === 'f_03' && numOneResults[1].fid === 'f_01')); 
        t.ok(bothFound,
             "OpenLayers.Layer.Vector.getFeaturesByAttribute returns the correct features with attribute 'clazz' set to the number 1");
        
        // advanced use case: find the 1 feature, that has an attribute not set
        var undefined;
        var humptyNotSet = layer.getFeaturesByAttribute('humpty', undefined);
        t.ok(humptyNotSet.length === 1,
             "OpenLayers.Layer.Vector.getFeaturesByAttribute can be used to find features that have certain attributes not set");
        t.ok(humptyNotSet[0].fid === 'f_02',
             "OpenLayers.Layer.Vector.getFeaturesByAttribute found the correct featuren that has a certain attribute not set");
    }

    function test_Layer_Vector_getDataExtent(t) {
        t.plan(1);
        var layer = new OpenLayers.Layer.Vector(name);

        var point = new OpenLayers.Geometry.Point(-111.04, 45.68);
        var pointFeature = new OpenLayers.Feature.Vector(point);
        layer.addFeatures([pointFeature]);
        var point = new OpenLayers.Geometry.Point(-111.04, 5.68);
        var pointFeature = new OpenLayers.Feature.Vector(point);
        layer.addFeatures([pointFeature]);
        var extent = layer.getDataExtent();
        t.ok(extent.toBBOX() != layer.features[0].geometry.getBounds().toBBOX(), "extent from getDataExtent doesn't clobber first feature");
    }

    function test_Layer_Vector_getDataExtentEmpty(t) {
        t.plan(1);
        var layer = new OpenLayers.Layer.Vector(name);
        layer.addFeatures([new OpenLayers.Feature.Vector(null), new OpenLayers.Feature.Vector(null)]);
        var extent = layer.getDataExtent();
        t.eq(extent, null, "We expect null to be returned if there are no features with a geometry");
    }

    function test_Layer_Vector_removeFeatures(t) {
        t.plan(17);
    
        var layer = new OpenLayers.Layer.Vector(name);
        var features, log;

        var point1 = new OpenLayers.Geometry.Point(-111.04, 45.68);
        var pointFeature1 = new OpenLayers.Feature.Vector(point1);
        var point2 = new OpenLayers.Geometry.Point(-111.14, 45.78);
        var pointFeature2 = new OpenLayers.Feature.Vector(point2);

        // 1 test
        layer.addFeatures([pointFeature1, pointFeature2]);
        features = layer.removeFeatures([pointFeature1]);
        t.ok(layer.features.length == 1, "OpenLayers.Layer.Vector.removeFeatures removes a feature from the features array");

        // 1 test
        layer.addFeatures([pointFeature1.clone(), pointFeature2.clone()]);
        layer.selectedFeatures.push(layer.features[0]); 
        layer.removeFeatures(layer.features[0]);
        t.eq(layer.selectedFeatures, [], "Remove features removes selected features");

        // 1 test
        features = layer.removeFeatures(layer.features);
        t.ok(layer.features.length == 0,
             "OpenLayers.Layer.Vector.removeFeatures(layer.features) removes all feature from the features array");

        // 4 tests
        log = [];
        layer.addFeatures([pointFeature1, pointFeature2]);
        layer.events.register("featuresremoved", null, function(obj) {
            log.push(obj);
        });
        layer.removeFeatures(layer.features);
        t.eq(log.length, 1,
             "\"featuresremoved\" triggered once [0]");
        t.eq(log[0].features.length, 2,
             "\"featuresremoved\" listener is passed two features [0]");
        t.ok(log[0].features[0] == pointFeature1,
             "\"featuresremoved\" listener is passed the correct feature at index 0 [0]");
        t.ok(log[0].features[1] == pointFeature2,
             "\"featuresremoved\" listener is passed the correct feature at index 1 [0]");
        layer.events.remove("featuresremoved");

        // 4 tests
        log = [];
        layer.addFeatures([
            pointFeature1, pointFeature2,
            pointFeature1.clone(), pointFeature2.clone()
        ]);
        layer.selectedFeatures.push(pointFeature1);
        layer.selectedFeatures.push(pointFeature2);
        layer.events.register("featuresremoved", null, function(obj) {
            log.push(obj);
        });
        layer.removeFeatures(layer.selectedFeatures);
        t.eq(log.length, 1,
             "\"featuresremoved\" triggered once [1]");
        t.eq(log[0].features.length, 2,
             "\"featuresremoved\" listener is passed two features [1]");
        t.ok(log[0].features[0] == pointFeature1,
             "\"featuresremoved\" listener is passed the correct feature at index 0 [1]");
        t.ok(log[0].features[1] == pointFeature2,
             "\"featuresremoved\" listener is passed the correct feature at index 1 [1]");
        layer.events.remove("featuresremoved");
        layer.removeFeatures(layer.features);

        // 6 tests
        layer.events.register('beforefeatureremoved', null, function(obj) {
            t.ok(pointFeature1 == obj.feature,
                 "OpenLayers.Layer.Vector.removeFeatures triggers beforefeatureremoved with correct feature passed to callback");
        });
        layer.events.register('featureremoved', null, function(obj) {
            t.ok(pointFeature1 == obj.feature,
                 "OpenLayers.Layer.Vector.removeFeatures triggers featureremoved with correct feature passed to callback");
        });
        layer.events.register('featuresremoved', null, function(obj) {
            t.ok(pointFeature1 == obj.features[0],
                 "OpenLayers.Layer.Vector.removeFeatures triggers featuresremoved with correct features passed to callback");
        });
        layer.addFeatures([pointFeature1]);
        layer.removeFeatures([pointFeature1]);
        layer.addFeatures([pointFeature1]);
        layer.removeFeatures(layer.features);

        // 0 test
        layer.events.register('beforefeatureremoved', null, function(obj) {
            t.fail("OpenLayers.Layer.Vector.removeFeatures triggers beforefeatureremoved while it must not");
        });
        layer.events.register('featureremoved', null, function(obj) {
            t.fail("OpenLayers.Layer.Vector.removeFeatures triggers featureremoved while it must not");
        });
        layer.events.register('featuresremoved', null, function(obj) {
            t.fail("OpenLayers.Layer.Vector.removeFeatures triggers featuresremoved while it must not");
        });
        layer.addFeatures([pointFeature1]);
        layer.removeFeatures([pointFeature1], {silent: true});
     }
    
    function test_Layer_Vector_drawFeature(t) {
        t.plan(7);
        var layer = new OpenLayers.Layer.Vector("Test Layer", {isBaseLayer: true});
        var map = new OpenLayers.Map('map', {
            maxExtent: new OpenLayers.Bounds(-100, -100, 100, 100)
        });
        map.addLayer(layer);
        var geometry = new OpenLayers.Geometry.Point(10, 10);
        var feature = new OpenLayers.Feature.Vector(geometry);
        
        var f, s;
        
        // Bogus layer renderer needs some methods
        // for functional tests.
        layer.drawn = true;
        layer.renderer = {
            drawFeature: function(feature, style) {
                f = feature;
                s = style;
            },
            root: document.createElement("div"),
            destroy: function() { },
            eraseFeatures: function() {},
            setExtent: function() {}
        };
        

        layer.drawFeature(feature);
        t.ok(geometry.equals(f.geometry),
             "calls layer.renderer.drawFeature() with feature.geometry");
        
        feature.style = {foo: "bar"};
        layer.drawFeature(feature);
        t.eq(feature.style, s,
             "calls layer.renderer.drawFeature() with feature.style");
        
        feature.style = null;
        layer.style = {foo: "bar"};
        layer.drawFeature(feature);
        t.eq(layer.style.foo, s.foo,
             "given null feature style, uses layer style");

        feature.style = {foo1: "bar1"};
        layer.style = {foo2: "bar2"};
        var customStyle = {foo: "bar"};
        layer.drawFeature(feature, customStyle);
        t.eq(customStyle.foo, s.foo,
             "given a custom style, renders with that");
        
        // the real renderer's drawFeature method is tested in Renderer.html
        layer.renderer.drawFeature = function(feature) {
            return(feature.geometry.getBounds().intersectsBounds(map.getExtent()));
        }
        // reset the drawn to null as if the layer had never been rendered
        layer.drawn = null;
        
        layer.drawFeature(feature);
        t.ok(true, "Trying to draw a feature on an not drawn layer doesn't throw any error.");
        
        layer.addFeatures([feature]);
        
        map.setCenter(new OpenLayers.Bounds(0, 0, 0, 0), 6);
        t.ok(layer.unrenderedFeatures[feature.id], "Did not render feature outside the viewport.");
        map.panTo(new OpenLayers.LonLat(10, 10));
        t.ok(!layer.unrenderedFeatures[feature.id], "Rendered feature inside the viewport.");
        
        layer.features = [];
    }
    
    function test_deleted_state(t) {
        t.plan(9);
        
        var map = new OpenLayers.Map("map");
        var layer = new OpenLayers.Layer.Vector();
        map.addLayer(layer);
        var feature = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point(10, 10)
        );
        var log;
        layer.renderer = {
            drawFeature: function(f, s) {
                log = {
                    feature: f,
                    style: s
                };
            },
            destroy: function() {}
        };
        
        // draw feature with no state
        layer.drawn = true;
        layer.drawFeature(feature);
        t.ok(log.feature === feature, "[no state] drawFeature called with correct feature");
        t.ok(log.style.display !== "none", "[no state] drawFeature called with style display not none");

        // draw feature with delete style
        feature.state = OpenLayers.State.DELETE;
        layer.drawFeature(feature);
        t.ok(log.feature === feature, "[delete] drawFeature called with correct feature");
        t.eq(log.style.display, "none", "[delete] drawFeature called with style display none");

        // undelete the feature and redraw
        delete feature.state;
        delete feature.renderIntent;
        layer.drawFeature(feature);
        t.ok(log.feature === feature, "[undelete] drawFeature called with correct feature");
        t.ok(log.style.display !== "none", "[undelete] drawFeature called with style display not none");
        
        // change deleted style
        layer.styleMap.styles["delete"] = new OpenLayers.Style({fillOpacity: 0.1});

        // draw feature with delete style
        feature.state = OpenLayers.State.DELETE;
        layer.drawFeature(feature);
        t.ok(log.feature === feature, "[draw deleted] drawFeature called with correct feature");
        t.ok(log.style.display !== "none", "[draw deleted] drawFeature called with style display not none");
        t.eq(log.style.fillOpacity, 0.1,"[draw deleted] drawFeature called with correct fill opacity");

        
    }
    
    function test_Layer_Vector_eraseFeatures(t) {
        t.plan(2);
        var layer = new OpenLayers.Layer.Vector("Test Layer");
        var map = new OpenLayers.Map('map');
        map.addLayer(layer);
        var geometry = new OpenLayers.Geometry.Point(10, 10);
        var feature = new OpenLayers.Feature.Vector(geometry);
        
        var f;
        layer.renderer = {
            eraseFeatures: function(features) {
                f = features[0];
            },
            destroy: function() { }
        };

        layer.eraseFeatures([feature]);
        t.ok(f, "calls layer.renderer.eraseFeatures");
        t.ok(geometry.equals(f.geometry),
             "calls layer.renderer.eraseFeatures() given an array of features");
    }

    function test_Layer_Vector_destroyFeatures (t) {
        t.plan(8);
        var layer = new OpenLayers.Layer.Vector(name);
        var map = new OpenLayers.Map('map');
        map.addLayer(layer);
        var features = [], i;
        for (i = 0; i < 5; i++) {
            features.push(new OpenLayers.Feature.Vector(
                          new OpenLayers.Geometry.Point(0,0)));
        }
        layer.addFeatures(features);
        t.eq(layer.features.length, 5, "addFeatures adds 5 features");
        layer.selectedFeatures.push(features[0]); 
        layer.destroyFeatures();
        t.eq(layer.features.length, 0, "destroyFeatures triggers removal");
        t.eq(layer.selectedFeatures, [], "Destroy features removes selected features");
        var allDestroyed = true;
        for (i = 0; i < 5; i++) {
            if(features[i].geometry) {
                allDestroyed = false;
            }
        }
        t.ok(allDestroyed, "destroyFeatures actually destroys features");
        features = [];
        for (i = 0; i < 5; i++) {
            features.push(new OpenLayers.Feature.Vector(
                          new OpenLayers.Geometry.Point(0,0)));
        }
        layer.addFeatures(features);
        layer.selectedFeatures.push(features[0]);
        layer.selectedFeatures.push(features[1]);
        layer.destroyFeatures([features[0], features[1]]);
        t.eq(layer.features.length, 3, "destroyFeatures removes appropriate features");
        t.eq(layer.selectedFeatures, [], "destroyFeatures removes appropriate selected features");
        t.eq(features[0].geometry, null, "destroyFeatures destroys feature 0");
        t.eq(features[1].geometry, null, "destroyFeatures destroys feature 1");
    }

    function test_Layer_Vector_destroy (t) {
        t.plan(6);    

        var options = {protocol: new OpenLayers.Protocol(), 
                       strategies: [new OpenLayers.Strategy(), new OpenLayers.Strategy()]}
        var layer = new OpenLayers.Layer.Vector(name, options);
        var map = new OpenLayers.Map('map');
        map.addLayer(layer);
        layer.destroy();
        t.eq(layer.map, null, "layer.map is null after destroy");
        t.ok(!layer.renderer, "layer.renderer is falsey");
        var err;
        try {
            layer.getFeatureFromEvent({target: "map"});
        } catch (ex) {
            err = ex;
        }
        t.ok(err, "Error thrown when calling getFeatureFromEvent on destroyed layer");

        t.eq(layer.protocol, null, "layer.protocol is null after destroy");
        t.eq(layer.strategies, null, "layer.strategies is null after destroy");
        
        // test that we can call layer.destroy a second time without trouble
        try {
            layer.destroy();
            layer.destroy();
            t.ok(true, "layer.destroy called twice without any issues");
        } catch(err) {
            t.fail("calling layer.destroy twice triggers exception: " + err + " in " + err.fileName + " line " + err.lineNumber);
        }
        
    }
    
    function test_Layer_Vector_clone(t) {
        t.plan(5);
        var original = new OpenLayers.Layer.Vector(name, {dummyOption: "foo"});
        original.addFeatures([new OpenLayers.Feature.Vector(new OpenLayers.Geometry.Point(1,2), {foo: "bar"})]);
        var clone = original.clone();
        t.ok(clone instanceof OpenLayers.Layer.Vector, "clone is an instance of OpenLayers.Layer.Vector");
        t.ok(clone.name, original.name, "clone has the same name as the original");
        t.ok(clone.features[0] != original.features[0], "clone's feature does not equal the original's feature");
        t.eq(clone.features[0].attributes.foo, original.features[0].attributes.foo, "clone's feature has the same attributes as the original's feature");
        t.eq(clone.dummyOption, original.dummyOption, "clone's dummyOption equals the original's dummy option");
    }

    function test_Layer_Vector_externalGraphic(t) {
        t.plan(11);
        var layer = new OpenLayers.Layer.Vector("Test Layer", {isBaseLayer: true});
        var renderer = layer.renderer;
        var map = new OpenLayers.Map('map');
        map.addLayers([layer]);

        var geometryX = 10;
        var geometryY = 10;
        var geometry = new OpenLayers.Geometry.Point(geometryX, geometryY);
        var feature = new OpenLayers.Feature.Vector(geometry);

        map.zoomToMaxExtent();

        var customStyle1 = new Object({
                externalGraphic: 'test.png',
                pointRadius: 10
        });
        var customStyle2 = new Object({
                externalGraphic: 'test.png',
                graphicWidth: 12
        });
        var customStyle3 = new Object({
                externalGraphic: 'test.png',
                graphicHeight: 14
        });
        var customStyle4 = new Object({
                externalGraphic: 'test.png',
                graphicWidth: 24,
                graphicHeight: 16
        });
        var customStyle5 = new Object({
                externalGraphic: 'test.png',
                graphicWidth: 24,
                graphicOpacity: 1
        });
        var customStyle6 = new Object({
                externalGraphic: 'test.png',
                graphicWidth: 24,
                graphicHeight: 16,
                graphicXOffset: -24,
                graphicYOffset: -16
        });
               
        var root = renderer.vectorRoot;
        if (layer.renderer.CLASS_NAME == 'OpenLayers.Renderer.SVG') {
                feature.style = customStyle1;
                layer.drawFeature(feature);
                t.eq(root.firstChild.getAttributeNS(null, 'width'),
                             (2*customStyle1.pointRadius).toString(),
                             "given a pointRadius, width equals 2*pointRadius");
                t.eq(root.firstChild.getAttributeNS(null, 'height'),
                             (2*customStyle1.pointRadius).toString(),
                             "given a pointRadius, height equals 2*pointRadius");
                feature.style = customStyle2;
                layer.drawFeature(feature);
                t.eq(root.firstChild.getAttributeNS(null, 'width'),
                             root.firstChild.getAttributeNS(null, 'height'),
                             "given a graphicWidth, width equals height");
                t.eq(root.firstChild.getAttributeNS(null, 'width'),
                             customStyle2.graphicWidth.toString(),
                             "width is set correctly");
                feature.style = customStyle3;
                layer.drawFeature(feature);
                t.eq(root.firstChild.getAttributeNS(null, 'height'),
                             root.firstChild.getAttributeNS(null, 'width'),
                             "given a graphicHeight, height equals width");
                t.eq(root.firstChild.getAttributeNS(null, 'height'),
                             customStyle3.graphicHeight.toString(),
                             "height is set correctly");
                feature.style = customStyle4;
                layer.drawFeature(feature);
                t.eq(root.firstChild.getAttributeNS(null, 'height'),
                             customStyle4.graphicHeight.toString(),
                             "given graphicHeight and graphicWidth, both are set: height");
                t.eq(root.firstChild.getAttributeNS(null, 'width'),
                             customStyle4.graphicWidth.toString(),
                             "given graphicHeight and graphicWidth, both are set: width");
                feature.style = customStyle5;
                layer.drawFeature(feature);
                // we use startsWith here as some browsers (at least Safari 3 and FireFox 4)
                // do not append a semi-colon to the opacity string
                t.ok(OpenLayers.String.startsWith(
                            root.firstChild.getAttributeNS(null, 'style'),
                            "opacity: " + customStyle5.graphicOpacity.toString()),
                     "graphicOpacity correctly set");
                feature.style = customStyle6;
                layer.drawFeature(feature);
                var x = geometryX / renderer.getResolution() + renderer.left;
                var y = geometryY / renderer.getResolution() - renderer.top;
                // SVG setStyle() gets x and y using getAttributeNS(), which returns
                // a value with only 3 decimal digits. To mimic this we use toFixed(3) here
                x = x.toFixed(3);
                y = y.toFixed(3);
                // toFixed() returns a string
                x = parseFloat(x);
                y = parseFloat(y);
                t.eq(root.firstChild.getAttributeNS(null, 'x'),
                        (x + customStyle6.graphicXOffset).toFixed().toString(),
                        "graphicXOffset correctly set");
                t.eq(root.firstChild.getAttributeNS(null, 'y'),
                        (-y + customStyle6.graphicYOffset).toFixed().toString(),
                        "graphicYOffset correctly set");
        }
        if (layer.renderer.CLASS_NAME == 'OpenLayers.Renderer.VML') {
                feature.style = customStyle1;
                layer.drawFeature(feature);
                t.eq(root.firstChild.style.width,
                             (2*customStyle1.pointRadius).toString()+'px',
                             "given a pointRadius, width equals 2*pointRadius");
                t.eq(root.firstChild.style.height,
                             (2*customStyle1.pointRadius).toString()+'px',
                             "given a pointRadius, height equals 2*pointRadius");
                feature.style = customStyle2;
                layer.drawFeature(feature);
                t.eq(root.firstChild.style.width,
                             root.firstChild.style.height,
                             "given a graphicWidth, width equals height");
                t.eq(root.firstChild.style.width,
                             customStyle2.graphicWidth.toString()+'px',
                             "width is set correctly");
                feature.style = customStyle3;
                layer.drawFeature(feature);
                t.eq(root.firstChild.style.height,
                             root.firstChild.style.width,
                             "given a graphicHeight, height equals width");
                t.eq(root.firstChild.style.height,
                             customStyle3.graphicHeight.toString()+'px',
                             "height is set correctly");
                feature.style = customStyle4;
                layer.drawFeature(feature);
                var left = parseInt(root.firstChild.style.left);
                var top = parseInt(root.firstChild.style.top);
                t.eq(root.firstChild.style.height,
                             customStyle4.graphicHeight.toString()+'px',
                             "given graphicHeight and graphicWidth, both are set: height");
                t.eq(root.firstChild.style.width,
                             customStyle4.graphicWidth.toString()+'px',
                             "given graphicHeight and graphicWidth, both are set: width");
                feature.style = customStyle5;
                layer.renderer.clear();
                layer.drawFeature(feature);
                var fill = root.firstChild.getElementsByTagName("v:fill")[0];
                var opacity;
                if(fill) {
                    opacity = fill.getAttribute('opacity');
                }
                if(opacity === undefined) {
                    fill = root.firstChild.getElementsByTagName("fill")[0];
                    opacity = fill.getAttribute('opacity');
                }
                t.eq(opacity,
                             customStyle5.graphicOpacity,
                             "graphicOpacity correctly set"); 
                feature.style = customStyle6;
                layer.drawFeature(feature);
                var offsetLeft = parseInt(root.firstChild.style.left);
                var offsetTop = parseInt(root.firstChild.style.top);
                t.eq((offsetLeft-left)*2, customStyle6.graphicXOffset, "graphicXOffset correctly set");
                t.eq((top-offsetTop)*2, customStyle6.graphicYOffset, "graphicYOffset correctly set");

        }
    }

    function test_removeLayer_drawFeature(t) {
        // test behaviour when features are redrawn while
        // the layer has been removed from the map

        t.plan(1);

        // set up

        var map, layer, feature;

        map = new OpenLayers.Map("map");
        map.addLayer(new OpenLayers.Layer("base", {isBaseLayer: true}));

        layer = new OpenLayers.Layer.Vector("vector");
        map.addLayer(layer);

        map.zoomToMaxExtent();

        feature = new OpenLayers.Feature.Vector(
            new OpenLayers.Geometry.Point(1.0, 1.0));
        layer.addFeatures(feature);

        // test

        map.removeLayer(layer);
        layer.drawFeature(feature);
        layer.drawFeature(feature);
        map.addLayer(layer);

        var count = 0, node;
        while(node = document.getElementById(feature.geometry.id)) {
            node.parentNode.removeChild(node);
            count++;
        }

        t.eq(count, 1, "one geometry added, one geometry removed");

        // tear down

        map.destroy();
    }

    function test_vectorBeforeFeatureAddedVeto(t) {
        t.plan( 4 );

        var map = new OpenLayers.Map('map');
        layer = new OpenLayers.Layer.Vector("");
        map.addLayer(layer);
        var feature = new OpenLayers.Feature.Vector(new OpenLayers.Geometry(1.0, 1.0));
        layer.addFeatures([feature]);

        var addedFeatures = [];
        var beforefeatureadded_veto = function(evt) { return false; };
        layer.events.register("beforefeatureadded", layer, beforefeatureadded_veto);
        layer.events.register("featuresadded", layer, function(evt) {
            if (evt.features) {
                for (var i = 0; i < evt.features.length; i++) {
                    addedFeatures.push(evt.features[i]);
                }
            }
        });

        var blankFeatures = [
            new OpenLayers.Feature.Vector(new OpenLayers.Geometry(1.0, 1.0)),
            new OpenLayers.Feature.Vector(new OpenLayers.Geometry(1.0, 1.0))];
        layer.addFeatures(blankFeatures);

        t.eq(layer.features.length, 1,
            "features not added to layer after beforefeatureadded veto");
        t.eq(addedFeatures.length, 0,
            "no features sent to featuresadded on feature veto");

        addedFeatures = [];

        layer.events.unregister("beforefeatureadded", layer, beforefeatureadded_veto);
        beforefeatureadded_veto = function(evt) { return true; };
        layer.events.register("beforefeatureadded", layer, beforefeatureadded_veto);

        layer.addFeatures(blankFeatures);

        t.eq(layer.features.length, 3,
            "features added to layer as expected");
        t.eq(addedFeatures.length, 2,
            "featuresadded event received expected number of features");
    }



  </script>
</head>
<body>
<div id="map" style="width:500px;height:550px"></div>
</body>
</html>