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