require("../env");

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

var assert = require("assert");

module.exports = {

  topic: function() {

    return d3.select("body").append("div").transition()

        .delay(100)

        .duration(150)

        .ease("bounce");

  },

  "inherits the delay": function(t1) {

    var t2 = t1.transition();

    assert.equal(t2[0][0].delay, 100);

  },

  "inherits the duration": function(t1) {

    var t2 = t1.transition();

    assert.equal(t2[0][0].duration, 150);

  },

  "inherits easing": function(t1) {

    // TODO how to test this?

  },

  "inherits the transition id": function(t1) {

    var t2 = t1.transition();

    assert.equal(t2.id, t1.id);

  },

  "while transitioning": {

    topic: function(t1) {

      var t2 = t1.transition(),

          cb = this.callback;

      t2.each("start", function() {

        d3.timer(function() {

          cb(null, t2);

          return true;

        });

      });

    },

    "increments the lock's reference count": function(t2) {

      assert.isTrue(t2[0][0].node.__transition__.count > 1);

    }

  },

  "after transitioning": {

    topic: function(t1) {

      var cb = this.callback;

      t1.each("end", function() {

        d3.timer(function() {

          cb(null, t1);

          return true;

        }, 50);

      });

    },

    "decrements the lock's reference count": function(t1) {

      assert.isFalse("__transition__" in t1[0][0].node);

    }

  }

};