require("../env");

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

var vows = require("vows"),

    assert = require("assert");

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

suite.addBatch({

  "merge": {

    "merges an array of arrays": function() {

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

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

    },

    "returns a new array": function() {

      var input = [[1, 2, 3], [4, 5], [6]];

      assert.isFalse(d3.merge(input) === input);

    },

    "does not modify the input arrays": function() {

      var input = [[1, 2, 3], [4, 5], [6]];

      d3.merge(input);

      assert.deepEqual(input, [[1, 2, 3], [4, 5], [6]]);

    }

  }

});

suite.export(module);