auto_tests/tests/formats.js

   1 /**
   2  * @fileoverview Tests for data formats.
   3  *
   4  * @author konigsberg@google.com (Robert Konigsberg)
   5  */
   6
   7 import Dygraph from '../../src/dygraph';
   8
   9 describe("formats", function() {
  10
  11 cleanupAfterEach();
  12
  13 var dataString =
  14   "X,Y\n" +
  15   "0,-1\n" +
  16   "1,0\n" +
  17   "2,1\n" +
  18   "3,0\n";
  19
  20 var dataArray =
  21   [[0,-1],
  22   [1,0],
  23   [2,1],
  24   [3,0]];
  25 var BASE_OPTS = {labels: ['X', 'Y']};
  26
  27 it('testCsv', function() {
  28   var data = dataString;
  29   var graph = document.getElementById("graph");
  30   var g = new Dygraph(graph, data, {});
  31   assertData(g);
  32 });
  33
  34 it('testArray', function() {
  35   var data = dataArray;
  36   var graph = document.getElementById("graph");
  37   var g = new Dygraph(graph, data, BASE_OPTS);
  38   assertData(g);
  39 });
  40
  41 it('testFunctionReturnsCsv', function() {
  42   var data = function() { return dataString; };
  43
  44   var graph = document.getElementById("graph");
  45   var g = new Dygraph(graph, data, {});
  46   assertData(g);
  47 });
  48
  49 it('testFunctionDefinesArray', function() {
  50   var array = dataArray;
  51   var data = function() { return array; }
  52
  53   var graph = document.getElementById("graph");
  54   var g = new Dygraph(graph, data, BASE_OPTS);
  55   assertData(g);
  56 });
  57
  58 it('testXValueParser', function() {
  59   var data =
  60     "X,Y\n" +
  61     "d,-1\n" +
  62     "e,0\n" +
  63     "f,1\n" +
  64     "g,0\n";
  65
  66   var graph = document.getElementById("graph");
  67   var g = new Dygraph(graph, data, {
  68     xValueParser : function(str) {
  69       assert.equal(1, str.length);
  70       return str.charCodeAt(0) - "a".charCodeAt(0);
  71     }
  72   });
  73
  74   assert.equal(3, g.getValue(0, 0));
  75   assert.equal(4, g.getValue(1, 0));
  76   assert.equal(5, g.getValue(2, 0));
  77   assert.equal(6, g.getValue(3, 0));
  78 });
  79
  80 it('should throw on strings in native format', () => {
  81   assert.throws(() => {
  82     new Dygraph('graph', [['1', '10'], ['2', '20']])
  83   }, /expected number or date/i);
  84
  85   assert.throws(() => {
  86     new Dygraph('graph', [[new Date(), '10'], [new Date(), '20']])
  87   }, /expected number or array/i);
  88 });
  89
  90 var assertData = function(g) {
  91   var expected = dataArray;
  92
  93   assert.equal(4, g.numRows());
  94   assert.equal(2, g.numColumns());
  95
  96   for (var i = 0; i < 4; i++) {
  97     for (var j = 0; j < 2; j++) {
  98       assert.equal(expected[i][j], g.getValue(i, j));
  99     }
 100   }
 101 };
 102
 103 });