require("../env");

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

var vows = require("vows"),

    assert = require("assert");

var suite = vows.describe("d3.split");

suite.addBatch({

  "split": {

    topic: function() {

      return d3.split;

    },

    "splits an array into arrays": function(split) {

      var a = {}, b = {}, c = {}, d = {}, e = {}, f = {};

      assert.deepEqual(d3.split([a, null, b, c, undefined, d, e, f]), [[a], [b, c], [d, e, f]]);

    },

    "splits using the specified function": function(split) {

      assert.deepEqual(d3.split([1, 0, 2, 3, -1, 4, 5, 6], function(d) { return d <= 0; }), [[1], [2, 3], [4, 5, 6]]);

      assert.deepEqual(d3.split([1, 0, 2, 3, -1, 4, 5, 6], function(d, i) { return i & 1; }), [[1], [2], [-1], [5]]);

    },

    "ignores delimiters at the start or end": function(split) {

      var a = {}, b = {}, c = {};

      assert.deepEqual(d3.split([null, a, b, null, c]), [[a, b], [c]]);

      assert.deepEqual(d3.split([a, b, null, c, null]), [[a, b], [c]]);

      assert.deepEqual(d3.split([null, a, b, null, c, null]), [[a, b], [c]]);

      assert.deepEqual(d3.split([undefined, a, b, undefined, c]), [[a, b], [c]]);

      assert.deepEqual(d3.split([a, b, undefined, c, undefined]), [[a, b], [c]]);

      assert.deepEqual(d3.split([undefined, a, b, undefined, c, undefined]), [[a, b], [c]]);

    }

  }

});

suite.export(module);