text: // Copyright (c) 2011 Google, Inc.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  
  
  /** 
   * @fileoverview Test cases that ensure Dygraphs works at all.
   *
   * @author konigsberg@google.com (Robert Konigsberg)
   */
  
  describe("dygraphs-sanity", function() {
  
  var DEAD_SIMPLE_DATA = 'X,Y\n10,2100';
  var ZERO_TO_FIFTY = 'X,Y\n10,0\n20,50';
  
  beforeEach(function() {
    document.body.innerHTML = "<div id='graph'></div>";
  });
  
  /**
   * The sanity test of sanity tests.
   */
  it('testTrue', function() {
    assert.isTrue(true);
  });
  
  /**
   * Sanity test that ensures the graph element exists.
   */
  it('testGraphExists', function() {
    var graph = document.getElementById("graph");
    assert.isNotNull(graph);
  });
  
  // TODO(konigsberg): Move the following tests to a new package that
  // tests all kinds of toDomCoords, toDataCoords, toPercent, et cetera.
  
  /**
   * A sanity test of sorts, by ensuring the dygraph is created, and
   * isn't just some piece of junk object.
   */
  it('testToString', function() {
    var graph = document.getElementById("graph");
    var g = new Dygraph(graph, DEAD_SIMPLE_DATA, {});
    assert.isNotNull(g);
    assert.equal("[Dygraph graph]", g.toString());
  });
  
  /**
   * Test that when no valueRange is specified, the y axis range is
   * adjusted by 10% on top.
   */
  it('testYAxisRange_default', function() {
    var graph = document.getElementById("graph");
    assert.equal(0, graph.style.length);
    var g = new Dygraph(graph, ZERO_TO_FIFTY, {});
    assert.deepEqual([0, 55], g.yAxisRange(0));
  });
  
  /**
   * Test that valueRange matches the y-axis range specifically.
   */
  it('testYAxisRange_custom', function() {
    var graph = document.getElementById("graph");
    var g = new Dygraph(graph, ZERO_TO_FIFTY, { valueRange: [0,50] });
    assert.deepEqual([0, 50], g.yAxisRange(0));
    g.updateOptions({valueRange: null, axes: {y: {valueRange: [10, 40]}}});
    assert.deepEqual([10, 40], g.yAxisRange(0));
  });
  
  /**
   * Test that valueRange matches the y-axis range specifically.
   *
   * This is based on the assumption that 20 pixels are dedicated to the
   * axis label and tick marks.
   * TODO(konigsberg): change yAxisLabelWidth to 0 (or 20) and try again.
   */
  it('testToDomYCoord', function() {
    var graph = document.getElementById("graph");
    var g = new Dygraph(graph, ZERO_TO_FIFTY, { height: 70, valueRange: [0,50] });
  
    assert.equal(50, g.toDomYCoord(0));
    assert.equal(0, g.toDomYCoord(50));
  
    for (var x = 0; x <= 50; x++) {
      assert.closeTo(50 - x, g.toDomYCoord(x), 0.00001);
    }
    g.updateOptions({valueRange: null, axes: {y: {valueRange: [0, 50]}}});
  
    assert.equal(50, g.toDomYCoord(0));
    assert.equal(0, g.toDomYCoord(50));
  
    for (var x = 0; x <= 50; x++) {
      assert.closeTo(50 - x, g.toDomYCoord(x), 0.00001);
    }
  });
  
  /**
   * Test that the two-argument form of the constructor (no options) works.
   */
  it('testTwoArgumentConstructor', function() {
    var graph = document.getElementById("graph");
    new Dygraph(graph, ZERO_TO_FIFTY);
  });
  
  // Here is the first of a series of tests that just ensure the graph is drawn
  // without exception.
  //TODO(konigsberg): Move to its own test case.
  it('testFillStack1', function() {
    var graph = document.getElementById("graph");
    new Dygraph(graph, ZERO_TO_FIFTY, { stackedGraph: true });
  });
  
  it('testFillStack2', function() {
    var graph = document.getElementById("graph");
    new Dygraph(graph, ZERO_TO_FIFTY, { stackedGraph: true, fillGraph: true });
  });
  
  it('testFillStack3', function() {
    var graph = document.getElementById("graph");
    new Dygraph(graph, ZERO_TO_FIFTY, { fillGraph: true });
  });
  
  });
  