var vows = require(“vows”),
load = require("../load"), assert = require("../assert");
var suite = vows.describe(“selection.sort”);
suite.addBatch({
"selectAll(div).selectAll(span)": { topic: load("selection/sort").document(), "on a page with some spans": { topic: function(d3) { return d3.select("body").append("div").selectAll("div") .data([1, 2, 10, 20]) .enter().append("div") .selectAll("span") .data(function(d) { return [20 + d, 2 + d, 10, 1]; }) .enter().append("span"); }, "sorts elements by natural order": function(span) { span.sort(); assert.domNull(span[0][0].previousSibling); assert.domEqual(span[0][1].previousSibling, span[0][0]); assert.domEqual(span[0][2].previousSibling, span[0][1]); assert.domEqual(span[0][3].previousSibling, span[0][2]); assert.domNull(span[0][3].nextSibling); }, "sorts each group independently": function(span) { span.sort(function(a, b) { return b - a; }); assert.deepEqual(span[0].map(data), [21, 10, 3, 1]); assert.deepEqual(span[1].map(data), [22, 10, 4, 1]); assert.deepEqual(span[2].map(data), [30, 12, 10, 1]); assert.deepEqual(span[3].map(data), [40, 22, 10, 1]); }, "sorts using the specified comparator": function(span) { span.sort(function(a, b) { return (a + "").localeCompare(b + ""); }); assert.deepEqual(span[0].map(data), [1, 10, 21, 3]); assert.deepEqual(span[1].map(data), [1, 10, 22, 4]); assert.deepEqual(span[2].map(data), [1, 10, 12, 30]); assert.deepEqual(span[3].map(data), [1, 10, 22, 40]); }, "returns the current selection": function(span) { assert.isTrue(span.sort() === span); }, "sorts null nodes at the end of the selection": function(span) { var nulls = 0; span[0][0].parentNode.removeChild(span[0][0]); span[0][0] = null; span.sort(function(a, b) { if ((a === null) || (b === null)) ++nulls; return a - b; }); assert.equal(nulls, 0); assert.isNull(span[0][3]); assert.domNull(span[0][0].previousSibling); assert.domEqual(span[0][1], span[0][0].nextSibling); assert.domEqual(span[0][0], span[0][1].previousSibling); assert.domEqual(span[0][2], span[0][1].nextSibling); assert.domEqual(span[0][1], span[0][2].previousSibling); assert.domNull(span[0][2].nextSibling); assert.deepEqual(span[0].slice(0, -1).map(data), [3, 10, 21]); for (var i = 1; i < 4; ++i) { var d = span[i].parentNode.__data__; assert.domNull(span[i][0].previousSibling); assert.domEqual(span[i][1], span[i][0].nextSibling); assert.domEqual(span[i][0], span[i][1].previousSibling); assert.domEqual(span[i][2], span[i][1].nextSibling); assert.domEqual(span[i][1], span[i][2].previousSibling); assert.domEqual(span[i][3], span[i][2].nextSibling); assert.domEqual(span[i][2], span[i][3].previousSibling); assert.domNull(span[i][3].nextSibling); assert.deepEqual(span[i].map(data), [1, 2 + d, 10, 20 + d].sort(function(a, b) { return a - b; })); } } } }
});
function data(d) {
return d.__data__;
}
suite.export(module);