/*
 *    Copyright [2011] [wisemapping]
 *
 *   Licensed under WiseMapping Public License, Version 1.0 (the "License").
 *   It is basically the Apache License, Version 2.0 (the "License") plus the
 *   "powered by wisemapping" text requirement on every single page;
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the license at
 *
 *       http://www.wisemapping.org/license
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
mindplot.layout.TestSuite = new Class({
    Extends: mindplot.layout.ChildrenSorterStrategy,

    initialize:function() {
        $("basicTest").setStyle("display","block");

//        this.testAligned();
        this.testBaselineAligned1();
        this.testBaselineAligned2();
        this.testEvents();
        this.testEventsComplex();
        this.testDisconnect();
        this.testReconnect();
        this.testRemoveNode();
        this.testSize();
        this.testReconnectSingleNode();
    },

    testAligned: function() {
        console.log("testAligned:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0, 1, 0);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(1, 2, 0);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(2, 3, 0);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(3, 4, 0);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0,5,2);
        manager.addNode(6, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0,6,4);
        manager.addNode(7, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0,7,6);

        manager.layout();
        manager.plot("testAligned", {width:1200,height:200});

        // Child nodes should be vertically aligned
        $assert(manager.find(1).getPosition().y == manager.find(2).getPosition().y, "Child nodes are not vertically aligned");
        $assert(manager.find(1).getPosition().y == manager.find(3).getPosition().y, "Child nodes are not vertically aligned");
        $assert(manager.find(1).getPosition().y == manager.find(4).getPosition().y, "Child nodes are not vertically aligned");

        // Siblings should be horizontally aligned
        $assert(manager.find(1).getPosition().x == manager.find(5).getPosition().x, "Sibling nodes are not horizontally aligned");
        $assert(manager.find(1).getPosition().x == manager.find(6).getPosition().x, "Sibling nodes are not horizontally aligned");
        $assert(manager.find(1).getPosition().x == manager.find(7).getPosition().x, "Sibling nodes are not horizontally aligned");

        console.log("OK!\n\n");
    },

    testBaselineAligned1: function() {
        console.log("testBaselineAligned1:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0, 1, 0);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(1, 3, 0);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(3, 5, 0);
        manager.addNode(6, {width:140, height:130}, position).connectNode(3, 6, 1);
        manager.addNode(7, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(6, 7, 0);
        manager.addNode(8, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 8, 0);
        manager.addNode(9, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 9, 1);
        manager.addNode(10, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 10, 2);
        manager.addNode(11, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 11, 3);
        manager.addNode(12, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 12, 4);
        manager.addNode(13, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 13, 5);
        manager.addNode(14, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 14, 6);
        manager.addNode(15, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 15, 7);
        manager.addNode(16, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 16, 8);
        manager.addNode(17, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(7, 17, 9);
        manager.addNode(29, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(6, 29, 1);
        manager.addNode(30, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(6, 30, 2);
        manager.addNode(31, {width:100, height:50}, position).connectNode(6, 31, 3);

        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(1, 4, 1);
        manager.addNode(18, {width:80, height:70}, position).connectNode(4, 18, 0);
        manager.addNode(19, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(18, 19, 0);
        manager.addNode(20, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(19, 20, 0);
        manager.addNode(21, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(20, 21, 0);

        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0, 2, 1);
        manager.addNode(22, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(2, 22, 0);
        manager.addNode(24, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(22, 24, 0);

        manager.addNode(23, {width:80, height:50}, position).connectNode(2, 23, 1);
        manager.addNode(25, {width:80, height:40}, position).connectNode(23, 25, 0);
        manager.addNode(26, {width:80, height:80}, position).connectNode(25, 26, 0);
        manager.addNode(27, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(26, 27, 0);
        manager.addNode(28, {width:80, height:80}, position).connectNode(27, 28, 0);

//        manager.layout();
//        manager.plot("testBaselineAligned1", {width:1600,height:800});

        console.log("OK!\n\n");
    },

    testBaselineAligned2: function() {
        console.log("testBaselineAligned2:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(0, 1, 0);
        manager.addNode(2, {width: 130, height:200}, position).connectNode(1, 2, 0);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(2, 3, 0);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(2, 4, 1);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(2, 5, 2);
        manager.addNode(6, mindplot.layout.TestSuite.NODE_SIZE, position).connectNode(2, 6, 3);


        manager.layout();
        manager.plot("testBaselineAligned2", {width:1600,height:800});

        console.log("OK!\n\n");
    },

    testEvents: function() {
        console.log("testEvents:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, {x:0, y: 60});
        manager.connectNode(0, 1, 0);
        manager.connectNode(0, 2, 1);
        manager.connectNode(1, 3, 0);

        var events = [];
        manager.addEvent('change', function(event) {
            console.log("\tUpdated nodes: {id:" + event.getId() + ", order: " + event.getOrder() + ",position: {" + event.getPosition().x + "," + event.getPosition().y + "}");
            events.push(event);
        });
        manager.layout(true);
        manager.plot("testEvents1", {width:800, height:200});

        console.log("\t--- Layout without changes should not affect the tree  ---");
        events.empty();
        manager.layout(true);
        manager.plot("testEvents2", {width:800, height:200});

        // Check no events where fired
        $assert(events.length == 0, "Unnecessary tree updated.");

        console.log("OK!\n\n");
    },

    testEventsComplex: function() {
        console.log("testEventsComplex:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(6, mindplot.layout.TestSuite.NODE_SIZE, {x:0, y:60});
        manager.connectNode(0, 1, 0);
        manager.connectNode(0, 2, 1);
        manager.connectNode(0, 3, 2);
        manager.connectNode(3, 4, 0);
        manager.connectNode(3, 5, 1);

        var events = [];
        manager.addEvent('change', function(event) {
            console.log("\tUpdated nodes: {id:" + event.getId() + ", order: " + event.getOrder() + ",position: {" + event.getPosition().x + "," + event.getPosition().y + "}");
            events.push(event);
        });

        manager.layout(true);
        manager.plot("testEventsComplex1", {width:800, height:200});

        console.log("\t--- Connect a new node  ---");

        events.empty();
        manager.connectNode(3, 6, 2);
        manager.layout(true);
        manager.plot("testEventsComplex2", {width:800, height:200});

        // Check only 4 nodes were repositioned
        $assert(events.length == 4, "Only 4 nodes should be repositioned.");

        console.log("OK!\n\n");
    },

    testDisconnect: function() {
        console.log("testDisconnect:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(6, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(7, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.connectNode(0, 1, 0);
        manager.connectNode(1, 2, 0);
        manager.connectNode(1, 3, 1);
        manager.connectNode(1, 4, 2);
        manager.connectNode(4, 5, 0);
        manager.connectNode(5, 6, 0);
        manager.connectNode(5, 7, 1);

        var events = [];
        manager.addEvent('change', function(event) {
            var pos = event.getPosition();
            var posStr = pos ? ",position: {" + pos.x + "," + pos.y : "";
            var node = manager.find(event.getId());
            console.log("\tUpdated nodes: {id:" + event.getId() + ", order: " + event.getOrder() + posStr + "}");
            events.push(event);
        });
        manager.layout(true);
        manager.plot("testDisconnect1", {width:1200, height:400});

        console.log("--- Disconnect node 2 ---");
        events.empty();
        manager.disconnectNode(2);
        manager.layout(true);
        manager.plot("testDisconnect2", {width:1200, height:400});

        // Check that orders have been shifted accordingly
        $assert(manager.find(2).getOrder() == 0, "Node 2 should have order 0");
        $assert(manager.find(3).getOrder() == 0, "Node 3 should now have order 0");
        $assert(manager.find(4).getOrder() == 1, "Node 4 should have order 1");

        console.log("--- Disconnect node 4 ---");
        manager.disconnectNode(4);
        manager.layout(true);
        manager.plot("testDisconnect3", {width:1200, height:400});

        // Check that nodes 1 and 3 are now vertically aligned
        $assert(manager.find(1).getPosition().y == manager.find(3).getPosition().y, "Nodes 1 and 3 should now be vertically aligned");

        console.log("OK!\n\n");
    },

    testReconnect: function() {
        console.log("testReconnect:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(6, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(7, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(8, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(9, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(10, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(11, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(12, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.connectNode(0, 1, 0);
        manager.connectNode(0, 2, 1);
        manager.connectNode(0, 3, 2);
        manager.connectNode(0, 4, 3);
        manager.connectNode(0, 5, 4);
        manager.connectNode(1, 6, 0);
        manager.connectNode(1, 7, 1);
        manager.connectNode(7, 8, 0);
        manager.connectNode(8, 9, 0);
        manager.connectNode(5, 10, 0);
        manager.connectNode(6, 11, 0);
        manager.connectNode(6, 12, 1);

        manager.layout();
        manager.plot("testReconnect1",{width:1200, height:400});

        // Reconnect node 6 to node 4
        console.log("\tReconnect node 6 to node 4");
        manager.disconnectNode(6);
        manager.connectNode(4,6,0);
        manager.layout();
        manager.plot("testReconnect2",{width:1200, height:400});

        // Check nodes are left aligned correctly
        $assert(manager.find(1).getPosition().y == manager.find(7).getPosition().y, "Nodes 1 and 7 should be vertically aligned");
        $assert(manager.find(4).getPosition().y == manager.find(6).getPosition().y, "Nodes 4 and 6 should be vertically aligned");
        $assert(manager.find(4).getPosition().x > manager.find(6).getPosition().x, "Node 6 and their children should be to the left of node 4");
        $assert(manager.find(6).getPosition().x > manager.find(11).getPosition().x && manager.find(11).getPosition().x == manager.find(12).getPosition().x, "Nodes 11 and 12 should be to the left of node 6 and horizontally aligned");

        console.log("OK!\n\n");
    },

    testRemoveNode: function() {
        console.log("testRemoveNode:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        // Prepare a sample graph ...
        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(3, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(6, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(7, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(8, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(9, mindplot.layout.TestSuite.NODE_SIZE, position);

        manager.connectNode(0, 1, 0);
        manager.connectNode(0, 5, 1);
        manager.connectNode(0, 6, 2);
        manager.connectNode(0, 7, 3);
        manager.connectNode(0, 8, 4);
        manager.connectNode(0, 9, 5);
        manager.connectNode(1, 2, 0);
        manager.connectNode(1, 3, 1);
        manager.connectNode(3, 4, 0);

        var events = [];
        manager.addEvent('change', function(event) {
            var pos = event.getPosition();
            var posStr = pos ? ",position: {" + pos.x + "," + event.getPosition().y : "";
            events.push(event);
        });
        manager.layout(true);
        manager.plot("testRemoveNode1", {width:1000, height:200});

        console.log("\t--- Remove node 3  ---");
        manager.removeNode(3);
        manager.layout(true);
        manager.plot("testRemoveNode2", {width:1000, height:200});

        // Check nodes are correctly aligned and node 6 is aligned with the root node
        $assert(manager.find(1).getPosition().y == manager.find(2).getPosition().y, "Nodes 1 and 2 should be vertically algined");
        $assert(manager.find(6).getPosition().y == manager.find(0).getPosition().y, "Node 6 should be aligned to the root node");

        console.log("\t--- Remove node 6  ---");
        manager.removeNode(6);
        manager.layout(true);
        manager.plot("testRemoveNode3", {width:1000, height:200});

        // Check orders were shifted accordingly
        $assert(manager.find(8).getOrder() == 2, "Node 8 should have order 2");

        console.log("\t--- Remove node 5  ---");
        manager.removeNode(5);
        manager.layout(true);
        manager.plot("testRemoveNode4", {width:1000, height:200});

        // Check orders were shifted accordingly
        $assert(manager.find(7).getOrder() == 1, "Node 7 should have order 1");
        $assert(manager.find(9).getOrder() == 3, "Node 9 should have order 3");

        console.log("OK!\n\n");
    },

    testSize: function() {
        console.log("testSize:");
        var position = {x:0, y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        manager.addNode(1, {width: 60, height: 60}, position);
        manager.addNode(2, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(3, {width: 260, height: 30}, position);
        manager.addNode(4, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(5, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(7, {width: 80, height: 80}, position);
        manager.addNode(8, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(9, {width: 30, height: 30}, position);
        manager.addNode(10, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(11, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(12, {width: 100, height: 70}, position);
        manager.addNode(13, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(14, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(15, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(16, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.addNode(17, mindplot.layout.TestSuite.NODE_SIZE, position);

        manager.connectNode(0,1,0);
        manager.connectNode(1,16,0);
        manager.connectNode(0,2,1);
        manager.connectNode(0,3,2);
        manager.connectNode(0,4,3);
        manager.connectNode(0,5,4);
        manager.connectNode(4,7,0);
        manager.connectNode(7,15,0);
        manager.connectNode(7,17,1);
        manager.connectNode(4,8,1);
        manager.connectNode(8,9,0);
        manager.connectNode(3,10,0);
        manager.connectNode(3,11,1);
        manager.connectNode(9,12,0);
        manager.connectNode(9,13,1);
        manager.connectNode(13,14,0);

        manager.layout();
        manager.plot("testSize1", {width: 1400, height: 400});

        // Check that all enlarged nodes shift children accordingly
        $assert(manager.find(10).getPosition().x > manager.find(3).getPosition().x && manager.find(10).getPosition().x == manager.find(11).getPosition().x, "Nodes 10 and 11 should be horizontally algined and to the right of enlarged node 3");
        var xPosNode7 = manager.find(7).getPosition().x;
        var xPosNode8 = manager.find(8).getPosition().x;

        manager.updateNodeSize(4, {width:100, height:30});
        manager.layout();
        manager.plot("testSize2", {width: 1400, height: 400});

        // Check that all enlarged nodes shift children accordingly
        $assert(manager.find(2).getPosition().x - manager.find(4).getPosition().x  == 10, "Node 4 should have been shifted by 10");
        $assert(xPosNode7 - manager.find(7).getPosition().x == 20, "Node 7 should have been shifted by 20");
        $assert(xPosNode8 - manager.find(8).getPosition().x == 20, "Node 8 should have been shifted by 20");

        var graph2 = manager.plot("testSize3", {width: 1400, height: 400});
        this._plotPrediction(graph2, manager.predict(0, null, {x:-145, y:400}));
        this._plotPrediction(graph2, manager.predict(9, null, {x:-330, y:70}));
        this._plotPrediction(graph2, manager.predict(9, null, {x:-330, y:120}));
        this._plotPrediction(graph2, manager.predict(0, null, {x:15, y:20}));
        //TODO(gb): make asserts

        var graph3 = manager.plot("testSize4", {width: 1400, height: 400});
        this._plotPrediction(graph3, manager.predict(0, null, null));
        this._plotPrediction(graph3, manager.predict(9, null, null));
        this._plotPrediction(graph3, manager.predict(3, null, null));
        this._plotPrediction(graph3, manager.predict(1, null, null));
        //TODO(gb): make asserts

        var yPosNode2 = manager.find(2).getPosition().y;
        manager.updateNodeSize(7, {width:80, height:120});
        manager.layout();
        manager.plot("testSize5", {width: 1400, height: 400});

        // Check that all enlarged nodes shift children accordingly
        $assert(yPosNode2 - manager.find(2).getPosition().y == 20, "Node 2 should have been shifted by 20");

        console.log("OK!\n\n");
    },

    testReconnectSingleNode: function() {
        console.log("testReconnectSingleNode:");
        var position = {x:0,y:0};
        var manager = new mindplot.layout.LayoutManager(0, mindplot.layout.TestSuite.ROOT_NODE_SIZE);

        // Prepare a sample graph ...
        manager.addNode(1, mindplot.layout.TestSuite.NODE_SIZE, position);
        manager.connectNode(0, 1, 0);
        manager.layout();
        var graph = manager.plot("testReconnectSingleNode1", {width:1000, height:400});
        var prediction = manager.predict(0, null, {x:-50, y:0});
        this._plotPrediction(graph, prediction);

        // Check prediction is to the left of the root node
        $assert(prediction.position.x < manager.find(0).getPosition().x, "Prediction should be to the left of the root node");
        $assert(prediction.order == 1, "Prediction should have order 1");

        manager.disconnectNode(1);
        manager.connectNode(0,1,1);
        manager.layout();
        manager.plot("testReconnectSingleNode2", {width:1000, height:400});

        // Check reconnected node is to the left of the root node
        $assert(manager.find(1).getPosition().x < manager.find(0).getPosition().x, "Node 1 should now be to the left of the root node");
        $assert(manager.find(1).getOrder() == 1, "Node 1 should now have order 0");
    },

    _plotPrediction: function(canvas, prediction) {
        var position = prediction.position;
        var order = prediction.order;
        console.log("\t\tprediction {order:" + order + ", position: (" + position.x + "," + position.y + ")}");
        var cx = position.x + canvas.width / 2 - mindplot.layout.TestSuite.NODE_SIZE.width / 2;
        var cy = position.y + canvas.height / 2 - mindplot.layout.TestSuite.NODE_SIZE.height / 2;
        canvas.rect(cx, cy, mindplot.layout.TestSuite.NODE_SIZE.width, mindplot.layout.TestSuite.NODE_SIZE.height);
    }
});

mindplot.layout.TestSuite.NODE_SIZE = {width:80, height:30},
mindplot.layout.TestSuite.ROOT_NODE_SIZE = {width:120, height:40}