var vows = require("vows"),

load = require("../load"),

assert = require("../assert");

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

suite.addBatch({

"xml": {

topic: load("xhr/xml").expression("d3.xml").document(),

"on a sample file": {

topic: function(xml) {

xml("test/data/sample.xml", this.callback);

},

"invokes the callback with the loaded xml": function(xml) {

assert.deepEqual(xml, {_xml: "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n<hello>\n <world name=\"Earth\"/>\n</hello>\n"});

},

"does not override the mime type by default": function(xml) {

assert.isUndefined(XMLHttpRequest._last._info.mimeType);

}

},

"with a custom mime type": {

topic: function(xml) {

xml("test/data/sample.txt", "application/xml+sample", this.callback);

},

"observes the optional mime type": function(xml) {

assert.equal(XMLHttpRequest._last._info.mimeType, "application/xml+sample");

}

},

"on a file that does not exist": {

topic: function(xml) {

var callback = this.callback;

xml("//does/not/exist.xml", function(error, xml) {

callback(null, xml);

});

},

"invokes the callback with undefined when an error occurs": function(xml) {

assert.isUndefined(xml);

}

}

}

});

suite.export(module);