1 require("../env");

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

     3 

     4 var assert = require("assert");

     5 

     6 module.exports = {

     7   topic: function() {

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

     9         .data(["one", "two", "three", "four"])

    10       .enter().append("div")

    11         .attr("class", String);

    12 

    13     s.filter(function(d, i) { return i > 0; }).append("span");

    14     s.filter(function(d, i) { return i > 1; }).append("span");

    15     s[0][3] = null;

    16 

    17     return s.transition()

    18         .delay(function(d, i) { return i * 13; })

    19         .duration(function(d, i) { return i * 21; });

    20   },

    21 

    22   "selects all matching elements": function(transition) {

    23     var t = transition.selectAll("span");

    24     assert.domEqual(t[1][0].node.parentNode, transition[0][1].node);

    25     assert.domEqual(t[2][0].node.parentNode, transition[0][2].node);

    26     assert.domEqual(t[2][1].node.parentNode, transition[0][2].node);

    27   },

    28   "ignores null elements": function(transition) {

    29     var t = transition.selectAll("span");

    30     assert.equal(t.length, 3);

    31   },

    32   "propagates delay to the selected elements": function(transition) {

    33     var t = transition.selectAll("span");

    34     assert.domEqual(t[1][0].delay, 13);

    35     assert.domEqual(t[2][0].delay, 26);

    36     assert.domEqual(t[2][1].delay, 26);

    37   },

    38   "propagates duration to the selected elements": function(transition) {

    39     var t = transition.selectAll("span");

    40     assert.domEqual(t[1][0].duration, 21);

    41     assert.domEqual(t[2][0].duration, 42);

    42     assert.domEqual(t[2][1].duration, 42);

    43   },

    44   "returns empty if no match is found": function(transition) {

    45     var t = transition.selectAll("span");

    46     assert.isEmpty(t[0]);

    47   },

    48   "inherits transition id": function(transition) {

    49     var id = transition.id,

    50         t0 = transition.selectAll("span"),

    51         t1 = transition.selectAll("span");

    52     assert.equal(t0.id, id);

    53     assert.equal(t1.id, id);

    54   },

    55   "groups are not instances of NodeList": function(transition) {

    56     var t = transition.selectAll(function() { return this.getElementsByClassName("span"); });

    57     assert.isFalse(t[0] instanceof window.NodeList);

    58   }

    59 };