88 строки
2.7 KiB
JavaScript
88 строки
2.7 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.each");
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suite.addBatch({
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"select(body)": {
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topic: load("selection/each").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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"calls the function once per element": function(body) {
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var count = 0;
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body.each(function() { ++count; });
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assert.equal(count, 1);
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},
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"passes the data and index to the function": function(body) {
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var data = new Object(), dd, ii;
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body.data([data]).each(function(d, i) { dd = d; ii = i; });
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assert.isTrue(dd === data);
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assert.isTrue(ii === 0);
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},
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"uses the node as the context": function(body) {
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var node;
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body.each(function() { node = this; });
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assert.isTrue(node === body.node());
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},
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"returns the same selection": function(body) {
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assert.isTrue(body.each(function() {}) === body);
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},
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"returns the current selection": function(body) {
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assert.isTrue(body.each(function() {}) === body);
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},
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"ignores null nodes": function(body) {
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var count = 0;
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body[0][0] = null;
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body.each(function() { ++count; });
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assert.equal(count, 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/each").document(),
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"on a simple page": {
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topic: function(d3) {
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return d3.select("body").selectAll("div").data([0, 1]).enter().append("div");
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},
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"calls the function once per element": function(div) {
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var count = 0;
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div.each(function() { ++count; });
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assert.equal(count, 2);
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},
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"passes the data and index to the function": function(div) {
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var data = [new Object(), new Object()], dd = [], ii = [];
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div.data(data).each(function(d, i) { dd.push(d); ii.push(i); });
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assert.deepEqual(dd, data);
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assert.deepEqual(ii, [0, 1]);
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},
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"uses the node as the context": function(div) {
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var nodes = [];
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div.each(function() { nodes.push(this); });
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assert.equal(nodes.length, 2);
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assert.isTrue(div[0][0] == nodes[0]);
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assert.isTrue(div[0][1] == nodes[1]);
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},
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"returns the same selection": function(div) {
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assert.isTrue(div.each(function() {}) === div);
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},
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"returns the current selection": function(div) {
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assert.isTrue(div.each(function() {}) === div);
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},
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"ignores null nodes": function(div) {
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var count = 0;
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div[0][0] = null;
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div.each(function() { ++count; });
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assert.equal(count, 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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