1 require("../env");

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

     3 

     4 var vows = require("vows"),

     5     assert = require("assert");

     6 

     7 var suite = vows.describe("selection.map");

     8 

     9 suite.addBatch({

    10   "select(body)": {

    11     topic: function() {

    12       return d3.select("body").html("");

    13     },

    14     "updates the data according to the map function": function(body) {

    15       body.data([42]).map(function(d, i) { return d + i; });

    16       assert.equal(document.body.__data__, 42);

    17     },

    18     "returns the current selection": function(body) {

    19       assert.isTrue(body.map(function() { return 1; }) === body);

    20     }

    21   }

    22 });

    23 

    24 suite.addBatch({

    25   "selectAll(div)": {

    26     topic: function() {

    27       return d3.select("body").html("").selectAll("div").data(d3.range(2)).enter().append("div");

    28     },

    29     "updates the data according to the map function": function(div) {

    30       div.data([42, 43]).map(function(d, i) { return d + i; });

    31       assert.equal(div[0][0].__data__, 42);

    32       assert.equal(div[0][1].__data__, 44);

    33     },

    34     "returns the current selection": function(div) {

    35       assert.isTrue(div.map(function() { return 1; }) === div);

    36     },

    37     "ignores null nodes": function(div) {

    38       var some = d3.selectAll("div").data([42, 43]);

    39       some[0][1] = null;

    40       some.map(function() { return 1; });

    41       assert.equal(div[0][0].__data__, 1);

    42       assert.equal(div[0][1].__data__, 43);

    43     }

    44   }

    45 });

    46 

    47 suite.export(module);