var vows = require(“vows”),

load = require("../load"),
assert = require("../assert");

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

suite.addBatch({

"hierarchy": {
  topic: load("layout/treemap").expression("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 h = hierarchy(),
        nodes = h.sticky(true).nodes({value: 1, children: []});
    assert.equal(nodes[0].value, 1);
    h.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 h = hierarchy(),
        nodes = h.sticky(true).nodes({children: []});
    assert.equal(nodes[0].value, 0);
    h.nodes(nodes[0]);
    assert.equal(nodes[0].value, 0);
  }
}

});

suite.export(module);