1 require("../env");

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

     3 

     4 var assert = require("assert");

     5 

     6 module.exports = {

     7   topic: function() {

     8     var cb = this.callback;

     9 

    10     var s = d3.select("body").append("div")

    11         .attr("display", "none")

    12         .attr("font-size", "20px")

    13         .attr("width", 20)

    14         .attr("color", "red")

    15         .attr("xlink:type", "simple")

    16         .attr("xlink:href", "http://mbostock.github.com/d3/");

    17 

    18     var t = s.transition()

    19         .attr("display", null)

    20         .attr("font-size", function() { return null; })

    21         .attr("display", null)

    22         .attr("width", 100)

    23         .attr("width", 200)

    24         .attr("color", function() { return "green"; })

    25         .attr("xlink:href", null)

    26         .attr("xlink:type", function() { return null; })

    27         .each("end", function() { cb(null, {selection: s, transition: t}); });

    28   },

    29   "defines the corresponding attr tween": function(result) {

    30     assert.typeOf(result.transition.tween("attr.width"), "function");

    31     assert.typeOf(result.transition.tween("attr.color"), "function");

    32   },

    33   "the last attr operator takes precedence": function(result) {

    34     assert.equal(result.selection.attr("width"), "200");

    35   },

    36   "sets an attribute as a number": function(result) {

    37     assert.equal(result.selection.attr("width"), "200");

    38   },

    39   "sets an attribute as a function": function(result) {

    40     assert.equal(result.selection.attr("color"), "#008000");

    41   },

    42   "removes an attribute using a constant null": function(result) {

    43     assert.equal(result.selection.attr("display"), "");

    44   },

    45   "removes an attribute using a function null": function(result) {

    46     assert.equal(result.selection.attr("font-size"), "");

    47   },

    48   "removes a namespaced attribute using a constant null": function(result) {

    49     assert.equal(result.selection.attr("xlink:href"), "");

    50   },

    51   "removes a namespaced attribute using a function null": function(result) {

    52     assert.equal(result.selection.attr("xlink:type"), "");

    53   }

    54 };