var vows = require(“vows”),
load = require("../load"), assert = require("../assert");
var suite = vows.describe(“selection.size”);
suite.addBatch({
"select(body)": { topic: load("selection/size").document(), "on a simple page": { topic: function(d3) { return d3.select("body"); }, "returns zero for empty selections": function(body) { assert.equal(body.select("foo").size(), 0); }, "returns one for a singleton selection": function(body) { assert.equal(body.size(), 1); }, "does not count null nodes": function(body) { body[0][0] = null; assert.equal(body.size(), 0); } } }
});
suite.addBatch({
"selectAll(div)": { topic: load("selection/size").document(), "on a simple page": { topic: function(d3) { var body = d3.select("body"); body.append("div").append("span"); body.append("div"); return body.selectAll("div"); }, "returns null for empty selections": function(div) { assert.equal(div.select("foo").size(), 0); }, "returns the number of non-null nodes": function(div) { assert.equal(div.size(), 2); }, "does not count null nodes": function(div) { div[0][0] = null; assert.equal(div.size(), 1); } } }
});
suite.export(module);