1 require("../env");

     2 require("../../d3");

     3 require("../../d3.layout");

     4 

     5 var vows = require("vows"),

     6     assert = require("assert");

     7 

     8 var suite = vows.describe("d3.layout.cluster");

     9 

    10 suite.addBatch({

    11   "cluster": {

    12     topic: d3.layout.cluster,

    13     "can handle an empty children array": function(cluster) {

    14       assert.deepEqual(cluster.nodes({value: 1, children: [{value: 1, children: []}, {value: 1}]}).map(layout), [

    15         {value: 1, depth: 0, x: 0.5,  y: 0},

    16         {value: 1, depth: 1, x: 0.25, y: 1},

    17         {value: 1, depth: 1, x: 0.75, y: 1}

    18       ]);

    19     },

    20     "can handle zero-valued nodes": function(cluster) {

    21       assert.deepEqual(cluster.nodes({value: 0, children: [{value: 0}, {value: 1}]}).map(layout), [

    22         {value: 0, depth: 0, x: 0.5,  y: 0},

    23         {value: 0, depth: 1, x: 0.25, y: 1},

    24         {value: 1, depth: 1, x: 0.75, y: 1}

    25       ]);

    26     }

    27   }

    28 });

    29 

    30 function layout(node) {

    31   return {

    32     value: node.value,

    33     depth: node.depth,

    34     x: node.x,

    35     y: node.y

    36   };

    37 }

    38 

    39 suite.export(module);