gviz.js

   1 /**
   2  * Unit tests for GViz data table support.
   3  */
   4
   5 import Dygraph from '../../src/dygraph';
   6
   7 import Util from './Util';
   8
   9 describe('gviz', function() {
  10
  11   cleanupAfterEach();
  12
  13   // This is a fake version of the gviz DataTable API, which can only be
  14   // sourced using the google js loader.
  15   //
  16   // Their example of the "data" structure is:
  17   //   cols: [{id: 'task', label: 'Task', type: 'string'},
  18   //          {id: 'hours', label: 'Hours per Day', type: 'number'}],
  19   //   rows: [{c:[{v: 'Work'}, {v: 11}]},
  20   //          {c:[{v: 'Eat'}, {v: 2}]},
  21   //          {c:[{v: 'Commute'}, {v: 2}]},
  22   //          {c:[{v: 'Watch TV'}, {v:2}]},
  23   //          {c:[{v: 'Sleep'}, {v:7, f:'7.000'}]}
  24   //         ]
  25   //
  26   // https://developers.google.com/chart/interactive/docs/reference#DataTable
  27   var FakeDataTable = function(data) {
  28     this.data = data;
  29   };
  30   FakeDataTable.prototype.getNumberOfColumns = function() {
  31     return this.data.cols.length;
  32   };
  33   FakeDataTable.prototype.getNumberOfRows = function() {
  34     return this.data.rows.length;
  35   };
  36   FakeDataTable.prototype.getColumnType = function(idx) {
  37     return this.data.cols[idx].type;
  38   };
  39   FakeDataTable.prototype.getColumnLabel = function(idx) {
  40     return this.data.cols[idx].label;
  41   };
  42   FakeDataTable.prototype.getValue = function(row, col) {
  43     return this.data.rows[row].c[col].v;
  44   };
  45   FakeDataTable.prototype.getColumnRange = function(col) {
  46     throw 'Not Implemented';
  47   };
  48
  49   // This mirrors http://dygraphs.com/tests/gviz.html
  50   var numericData = new FakeDataTable({
  51     cols: [{id:"",label:"X",type:"number"},
  52            {id:"",label:"A",type:"number"},
  53            {id:"",label:"B",type:"number"}],
  54     rows: [{c:[{v:0},{v:1},{v:7}]},
  55            {c:[{v:1},{v:2},{v:4}]},
  56            {c:[{v:2},{v:3},{v:3}]},
  57            {c:[{v:3},{v:4},{v:0}]}]
  58   });
  59
  60   it('should parse simple data tables', function() {
  61     var g = new Dygraph('graph', numericData);
  62     assert.equal(4, g.numRows());
  63     assert.equal(3, g.numColumns());
  64     assert.equal(0, g.getValue(0, 0));
  65     assert.equal(1, g.getValue(0, 1));
  66     assert.equal(7, g.getValue(0, 2));
  67     assert.equal(3, g.getValue(3, 0));
  68     assert.equal(4, g.getValue(3, 1));
  69     assert.equal(0, g.getValue(3, 2));
  70     assert.deepEqual(['X', 'A', 'B'], g.getLabels());
  71   });
  72
  73   it('should parse tables with annotations', function() {
  74     // Data from https://developers.google.com/chart/interactive/docs/gallery/annotatedtimeline
  75     var data = new FakeDataTable({
  76       cols: [
  77         {label: "Date", type: "date" },
  78         {label: "Sold Pencils", type: "number" },
  79         {label: "title1", type: "string" },
  80         {label: "text1", type: "string" },
  81         {label: "Sold Pens", type: "number" },
  82         {label: "title2", type: "string" },
  83         {label: "text2", type: "string" }
  84       ],
  85       rows: [
  86         {c: [{v: new Date(2008, 1, 1)}, {v: 30000}, {v: null}, {v: null},
  87              {v: 40645}, {v: null}, {v: null}]},
  88         {c: [{v: new Date(2008, 1, 2)}, {v: 14045}, {v: null}, {v: null},
  89              {v: 20374}, {v: null}, {v: null}]},
  90         {c: [{v: new Date(2008, 1, 3)}, {v: 55022}, {v: null}, {v: null},
  91              {v: 50766}, {v: null}, {v: null}]},
  92         {c: [{v: new Date(2008, 1, 4)}, {v: 75284}, {v: null}, {v: null},
  93              {v: 14334}, {v: "Out of Stock"}, {v: "Ran out of stock"}]},
  94         {c: [{v: new Date(2008, 1, 5)}, {v: 41476}, {v: "Bought Pens"},
  95              {v: "Bought 200k pens" }, {v: 66467}, {v: null}, {v: null}]},
  96         {c: [{v: new Date(2008, 1, 6)}, {v: 33322}, {v: null}, {v: null},
  97              {v: 39463}, {v: null}, {v: null}]}
  98       ]
  99     });
 100
 101     var g = new Dygraph('graph', data, {displayAnnotations: true});
 102
 103     var annEls = document.getElementsByClassName('dygraphDefaultAnnotation');
 104     assert.equal(2, annEls.length);
 105
 106     var annotations = g.annotations();
 107     assert.equal(2, annotations.length);
 108     var a0 = annotations[0];
 109     assert.deepEqual({
 110       text: 'Out of Stock\nRan out of stock',
 111       series: 'Sold Pens',
 112       xval: new Date(2008, 1, 4).getTime(),
 113       shortText: 'A'
 114     }, annotations[0]);
 115   });
 116
 117   it('should parse tables with dates', function() {
 118     // This mirrors http://dygraphs.com/tests/gviz.html
 119     var data = new FakeDataTable({
 120       cols: [{id:"",label:"Date",type:"datetime"},
 121              {id:"",label:"Column A",type:"number"},
 122              {id:"",label:"Column B",type:"number"}],
 123       rows: [{c:[{v:new Date(2009, 6, 1)},{v:1},{v:7}]},
 124              {c:[{v:new Date(2009, 6, 8)},{v:2},{v:4}]},
 125              {c:[{v:new Date(2009, 6, 15)},{v:3},{v:3}]},
 126              {c:[{v:new Date(2009, 6, 22)},{v:4},{v:0}]}]
 127     });
 128
 129     var g = new Dygraph('graph', data);
 130     assert.equal(4, g.numRows());
 131     assert.equal(3, g.numColumns());
 132     assert.equal(new Date(2009, 6, 1).getTime(), g.getValue(0, 0));
 133     assert.equal(1, g.getValue(0, 1));
 134     assert.equal(7, g.getValue(0, 2));
 135     assert.deepEqual(['Date', 'Column A', 'Column B'], g.getLabels());
 136   });
 137
 138   // it('should parse tables with error bars', function() {
 139   // });
 140
 141   it('should implement the gviz API', function() {
 142     var g = new Dygraph.GVizChart(document.getElementById('graph'));
 143     g.draw(numericData);
 144
 145     g.setSelection([{row: 0}]);
 146     assert.equal('0: A: 1 B: 7', Util.getLegend());
 147     assert.deepEqual([{row: 0, column: 1}, {row: 0, column: 2}], g.getSelection());
 148     g.setSelection([]);
 149     assert.deepEqual([], g.getSelection());
 150   });
 151 });