var vows = require(“vows”),

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

var suite = vows.describe(“d3.text”);

suite.addBatch({

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

  "on a sample file": {
    topic: function(text) {
      text("test/data/sample.txt", this.callback);
    },
    "invokes the callback with the loaded text": function(text) {
      assert.equal(text, "Hello, world!\n");
    },
    "does not override the mime type by default": function(text) {
      assert.isUndefined(XMLHttpRequest._last._info.mimeType);
    }
  },

  "with a custom mime type": {
    topic: function(text) {
      text("test/data/sample.txt", "text/plain+sample", this.callback);
    },
    "observes the optional mime type": function(text) {
      assert.equal(XMLHttpRequest._last._info.mimeType, "text/plain+sample");
    }
  },

  "on a file that does not exist": {
    topic: function(text) {
      var callback = this.callback;
      text("//does/not/exist.txt", function(error, text) {
        callback(null, text);
      });
    },
    "invokes the callback with undefined when an error occurs": function(text) {
      assert.isUndefined(text);
    }
  }
}

});

suite.export(module);