1 require("../env");

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

     3 

     4 var assert = require("assert");

     5 

     6 module.exports = {

     7   topic: function() {

     8     return d3.select("body").html("").selectAll()

     9         .data(["foo", "bar"])

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

    11         .attr("class", String);

    12   },

    13   "defaults to 250 milliseconds": function(selection) {

    14     var t = selection.transition();

    15     assert.strictEqual(t[0][0].duration, 250);

    16     assert.strictEqual(t[0][1].duration, 250);

    17   },

    18   "can specify duration as a number": function(selection) {

    19     var t = selection.transition().duration(150);

    20     assert.strictEqual(t[0][0].duration, 150);

    21     assert.strictEqual(t[0][1].duration, 150);

    22     t.duration(50);

    23     assert.strictEqual(t[0][0].duration, 50);

    24     assert.strictEqual(t[0][1].duration, 50);

    25   },

    26   "can specify duration as a function": function(selection) {

    27     var dd = [], ii = [], tt = [], t = selection.transition().duration(f);

    28     function f(d, i) { dd.push(d); ii.push(i); tt.push(this); return i * 20; }

    29     assert.strictEqual(t[0][0].duration, 0);

    30     assert.strictEqual(t[0][1].duration, 20);

    31     assert.deepEqual(dd, ["foo", "bar"], "expected data, got {actual}");

    32     assert.deepEqual(ii, [0, 1], "expected index, got {actual}");

    33     assert.domEqual(tt[0], t[0][0].node, "expected this, got {actual}");

    34     assert.domEqual(tt[1], t[0][1].node, "expected this, got {actual}");

    35   },

    36   "coerces duration to a number": function(selection) {

    37     var t = selection.transition().duration("150");

    38     assert.strictEqual(t[0][0].duration, 150);

    39     assert.strictEqual(t[0][1].duration, 150);

    40   }

    41 };