var vows = require(“vows”),

_ = require("../../"),
load = require("../load"),
assert = require("../assert");

var suite = vows.describe(“selection.style”);

suite.addBatch({

"on select(body)": {
  topic: load("selection/style").document(),
  "on an initially-empty page": {
    topic: function(d3) {
      return d3.select("body");
    },
    "sets a property as a string": function(body) {
      body.style("background-color", "red");
      assert.equal(body.node().style.getPropertyValue("background-color"), "red");
    },
    "sets a property as a number": function(body) {
      body.style("opacity", .3);
      assert.equal(body.node().style.getPropertyValue("opacity"), "0.3");
    },
    "sets a property as a function": function(body) {
      body.style("background-color", function() { return "orange"; });
      assert.equal(body.node().style.getPropertyValue("background-color"), "orange");
    },
    "sets properties as a map of constants": function(body) {
      body.style({"background-color": "white", opacity: .42});
      assert.equal(body.node().style.getPropertyValue("background-color"), "white");
      assert.equal(body.node().style.getPropertyValue("opacity"), "0.42");
    },
    "sets properties as a map of functions": function(body) {
      body.data(["orange"]).style({"background-color": String, opacity: function(d, i) { return i; }});
      assert.equal(body.node().style.getPropertyValue("background-color"), "orange");
      assert.equal(body.node().style.getPropertyValue("opacity"), "0");
    },
    "gets a property value": function(body) {
      body.node().style.setProperty("background-color", "yellow", "");
      assert.equal(body.style("background-color"), "yellow");
    },
    "observes the specified priority": function(body) {
      body.style("background-color", "green", "important");
      assert.equal(body.node().style.getPropertyPriority("background-color"), "important");
      body.style({opacity: .52}, "important");
      assert.equal(body.node().style.getPropertyPriority("opacity"), "important");
      body.style({visibility: function() { return "visible"; }}, "important");
      assert.equal(body.node().style.getPropertyPriority("visibility"), "important");
    },
    "removes a property as null": function(body) {
      body.style("background-color", "green").style("background-color", null);
      assert.equal(body.style("background-color"), "");
    },
    "removes a property as a function": function(body) {
      body.style("background-color", "green").style("background-color", function() { return null; });
      assert.equal(body.style("background-color"), "");
    },
    "removes properties as a map of nulls": function(body) {
      body.node().style.setProperty("background-color", "purple");
      body.style({"background-color": null});
      assert.equal(body.style("background-color"), "");
    },
    "removes properties as a map of functions that return null": function(body) {
      body.node().style.setProperty("background-color", "purple");
      body.style({"background-color": function() {}});
      assert.equal(body.style("background-color"), "");
    },
    "returns the current selection": function(body) {
      assert.isTrue(body.style("background-color", "green") === body);
    }
  }
}

});

suite.addBatch({

"on selectAll(div)": {
  topic: load("selection/style").document(),
  "on a page with a few divs": {
    topic: function(d3) {
      return d3.select("body").selectAll("div").data([0, 1]).enter().append("div");
    },
    "sets a property as a string": function(div) {
      div.style("background-color", "red");
      assert.equal(div[0][0].style.getPropertyValue("background-color"), "red");
      assert.equal(div[0][1].style.getPropertyValue("background-color"), "red");
    },
    "sets a property as a number": function(div) {
      div.style("opacity", .5);
      assert.equal(div[0][0].style.getPropertyValue("opacity"), "0.5");
      assert.equal(div[0][1].style.getPropertyValue("opacity"), "0.5");
    },
    "sets a property as a function": function(div) {
      div.style("background-color", _.interpolateRgb("orange", "yellow"));
      assert.equal(div[0][0].style.getPropertyValue("background-color"), "#ffa500");
      assert.equal(div[0][1].style.getPropertyValue("background-color"), "#ffff00");
    },
    "gets a property value": function(div) {
      div[0][0].style.setProperty("background-color", "green", "");
      assert.equal(div.style("background-color"), "green");
    },
    "observes the specified priority": function(div) {
      div.style("background-color", "blue", "important");
      assert.equal(div[0][0].style.getPropertyPriority("background-color"), "important");
      assert.equal(div[0][1].style.getPropertyPriority("background-color"), "important");
    },
    "removes a property as null": function(div) {
      div.style("background-color", "red").style("background-color", null);
      assert.equal(div[0][0].style.getPropertyValue("background-color"), "");
      assert.equal(div[0][1].style.getPropertyValue("background-color"), "");
    },
    "removes a property as a function": function(div) {
      div.style("background-color", "red").style("background-color", function() { return null; });
      assert.equal(div[0][0].style.getPropertyValue("background-color"), "");
      assert.equal(div[0][1].style.getPropertyValue("background-color"), "");
    },
    "returns the current selection": function(div) {
      assert.isTrue(div.style("background-color", "green") === div);
    },
    "ignores null nodes": function(div) {
      var node = div[0][1];
      div[0][1] = null;
      div.style("background-color", null).style("background-color", "red");
      assert.equal(div[0][0].style.getPropertyValue("background-color"), "red");
      assert.equal(node.style.getPropertyValue("background-color"), "green");
    }
  }
}

});

suite.export(module);