auto_tests/tests/utils_test.js

   1 /**
   2  * @fileoverview Tests for stand-alone functions in dygraph-utils.js
   3  *
   4  * @author danvdk@gmail.com (Dan Vanderkam)
   5  */
   6
   7 var UtilsTestCase = TestCase("utils-tests");
   8
   9 UtilsTestCase.prototype.testUpdate = function() {
  10   var a = {
  11     a: 1,
  12     b: [1, 2, 3],
  13     c: { x: 1, y: 2},
  14     d: { f: 10, g: 20}
  15   };
  16   assertEquals(1, a['a']);
  17   assertEquals([1, 2, 3], a['b']);
  18   assertEquals({x: 1, y: 2}, a['c']);
  19   assertEquals({f: 10, g: 20}, a['d']);
  20
  21   Dygraph.update(a, { c: { x: 2 } });
  22   assertEquals({x: 2}, a['c']);
  23
  24   Dygraph.update(a, { d: null });
  25   assertEquals(null, a['d']);
  26
  27   Dygraph.update(a, { a: 10, b: [1, 2] });
  28   assertEquals(10, a['a']);
  29   assertEquals([1, 2], a['b']);
  30   assertEquals({x: 2}, a['c']);
  31   assertEquals(null, a['d']);
  32 };
  33
  34 UtilsTestCase.prototype.testUpdateDeep = function() {
  35   var a = {
  36     a: 1,
  37     b: [1, 2, 3],
  38     c: { x: 1, y: 2},
  39     d: { f: 10, g: 20}
  40   };
  41   assertEquals(1, a['a']);
  42   assertEquals([1, 2, 3], a['b']);
  43   assertEquals({x: 1, y: 2}, a['c']);
  44   assertEquals({f: 10, g: 20}, a['d']);
  45
  46   Dygraph.updateDeep(a, { c: { x: 2 } });
  47   assertEquals({x: 2, y: 2}, a['c']);
  48
  49   Dygraph.updateDeep(a, { d: null });
  50   assertEquals(null, a['d']);
  51
  52   Dygraph.updateDeep(a, { a: 10, b: [1, 2] });
  53   assertEquals(10, a['a']);
  54   assertEquals([1, 2], a['b']);
  55   assertEquals({x: 2, y: 2}, a['c']);
  56   assertEquals(null, a['d']);
  57 };
  58
  59 UtilsTestCase.prototype.testUpdateDeepDecoupled = function() {
  60   var a = {
  61     a: 1,
  62     b: [1, 2, 3],
  63     c: { x: "original", y: 2},
  64   };
  65
  66   var b = {};
  67   Dygraph.updateDeep(b, a);
  68
  69   b.a = 2;
  70   assertEquals(1, a.a);
  71
  72   b.b[0] = 2;
  73   assertEquals(1, a.b[0]);
  74
  75   b.c.x = "new value";
  76   assertEquals("original", a.c.x);
  77 };
  78
  79
  80 UtilsTestCase.prototype.testIterator_nopredicate = function() {
  81   var array = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
  82   var iter = Dygraph.createIterator(array, 1, 4);
  83   assertTrue(iter.hasNext);
  84   assertEquals('b', iter.peek);
  85   assertEquals('b', iter.next());
  86   assertTrue(iter.hasNext);
  87
  88   assertEquals('c', iter.peek);
  89   assertEquals('c', iter.next());
  90
  91   assertTrue(iter.hasNext);
  92   assertEquals('d', iter.next());
  93
  94   assertTrue(iter.hasNext);
  95   assertEquals('e', iter.next());
  96
  97   assertFalse(iter.hasNext);
  98 }
  99
 100 UtilsTestCase.prototype.testIterator_predicate = function() {
 101   var array = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];
 102   var iter = Dygraph.createIterator(array, 1, 4,
 103       function(array, idx) { return array[idx] !== 'd' });
 104   assertTrue(iter.hasNext);
 105   assertEquals('b', iter.peek);
 106   assertEquals('b', iter.next());
 107   assertTrue(iter.hasNext);
 108
 109   assertEquals('c', iter.peek);
 110   assertEquals('c', iter.next());
 111
 112   assertTrue(iter.hasNext);
 113   assertEquals('e', iter.next());
 114
 115   assertFalse(iter.hasNext);
 116 }
 117
 118 UtilsTestCase.prototype.testIterator_empty = function() {
 119   var array = [];
 120   var iter = Dygraph.createIterator([], 0, 0);
 121   assertFalse(iter.hasNext);
 122 }
 123
 124 UtilsTestCase.prototype.testIterator_outOfRange = function() {
 125   var array = ['a', 'b', 'c'];
 126   var iter = Dygraph.createIterator(array, 1, 4,
 127       function(array, idx) { return array[idx] !== 'd' });
 128   assertTrue(iter.hasNext);
 129   assertEquals('b', iter.peek);
 130   assertEquals('b', iter.next());
 131   assertTrue(iter.hasNext);
 132
 133   assertEquals('c', iter.peek);
 134   assertEquals('c', iter.next());
 135
 136   assertFalse(iter.hasNext);
 137 }
 138
 139 // Makes sure full array is tested, and that the predicate isn't called
 140 // with invalid boundaries.
 141 UtilsTestCase.prototype.testIterator_whole_array = function() {
 142   var array = ['a', 'b', 'c'];
 143   var iter = Dygraph.createIterator(array, 0, array.length,
 144       function(array, idx) {
 145         if (idx < 0 || idx >= array.length) {
 146           throw "err";
 147         } else {
 148           return true;
 149         };
 150       });
 151   assertTrue(iter.hasNext);
 152   assertEquals('a', iter.next());
 153   assertTrue(iter.hasNext);
 154   assertEquals('b', iter.next());
 155   assertTrue(iter.hasNext);
 156   assertEquals('c', iter.next());
 157   assertFalse(iter.hasNext);
 158   assertNull(iter.next());
 159 }
 160
 161 UtilsTestCase.prototype.testIterator_no_args = function() {
 162   var array = ['a', 'b', 'c'];
 163   var iter = Dygraph.createIterator(array);
 164   assertTrue(iter.hasNext);
 165   assertEquals('a', iter.next());
 166   assertTrue(iter.hasNext);
 167   assertEquals('b', iter.next());
 168   assertTrue(iter.hasNext);
 169   assertEquals('c', iter.next());
 170   assertFalse(iter.hasNext);
 171   assertNull(iter.next());
 172 }