require("../env");

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

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

var vows = require("vows"),

    assert = require("assert");

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

suite.addBatch({

  "hierarchy": {

    topic: function() {

      return d3.layout.treemap(); // hierarchy is abstract, so test a subclass

    },

    "doesn't overwrite the value of a node that has an empty children array": function(hierarchy) {

      var nodes = hierarchy.sticky(true).nodes({value: 1, children: []});

      assert.equal(nodes[0].value, 1);

      hierarchy.nodes(nodes[0]);

      assert.equal(nodes[0].value, 1);

    },

    "a valueless node that has an empty children array gets a value of 0": function(hierarchy) {

      var nodes = hierarchy.sticky(true).nodes({children: []});

      assert.equal(nodes[0].value, 0);

      hierarchy.nodes(nodes[0]);

      assert.equal(nodes[0].value, 0);

    }

  }

});

suite.export(module);