src/v8/test/mjsunit/number-is.js

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  27
  28 // Test number predicates that Harmony adds to the Number constructor:
  29 // isFinite(), isNaN(), isInteger(), isSafeInteger().
  30
  31 assertTrue(Number.isFinite(0));
  32 assertTrue(Number.isFinite(Number.MIN_VALUE));
  33 assertTrue(Number.isFinite(Number.MAX_VALUE));
  34 assertTrue(Number.isFinite(Number.MIN_SAFE_INTEGER));
  35 assertTrue(Number.isFinite(Number.MIN_SAFE_INTEGER - 13));
  36 assertTrue(Number.isFinite(Number.MAX_SAFE_INTEGER));
  37 assertTrue(Number.isFinite(Number.MAX_SAFE_INTEGER + 23));
  38 assertFalse(Number.isFinite(Number.NaN));
  39 assertFalse(Number.isFinite(Number.POSITIVE_INFINITY));
  40 assertFalse(Number.isFinite(Number.NEGATIVE_INFINITY));
  41 assertFalse(Number.isFinite(new Number(0)));
  42 assertFalse(Number.isFinite(1/0));
  43 assertFalse(Number.isFinite(-1/0));
  44 assertFalse(Number.isFinite({}));
  45 assertFalse(Number.isFinite([]));
  46 assertFalse(Number.isFinite("s"));
  47 assertFalse(Number.isFinite(null));
  48 assertFalse(Number.isFinite(undefined));
  49
  50 assertFalse(Number.isNaN(0));
  51 assertFalse(Number.isNaN(Number.MIN_VALUE));
  52 assertFalse(Number.isNaN(Number.MAX_VALUE));
  53 assertFalse(Number.isNaN(Number.MIN_SAFE_INTEGER - 13));
  54 assertFalse(Number.isNaN(Number.MAX_SAFE_INTEGER + 23));
  55 assertTrue(Number.isNaN(Number.NaN));
  56 assertFalse(Number.isNaN(Number.POSITIVE_INFINITY));
  57 assertFalse(Number.isNaN(Number.NEGATIVE_INFINITY));
  58 assertFalse(Number.isNaN(Number.EPSILON));
  59 assertFalse(Number.isNaN(new Number(0)));
  60 assertFalse(Number.isNaN(1/0));
  61 assertFalse(Number.isNaN(-1/0));
  62 assertFalse(Number.isNaN({}));
  63 assertFalse(Number.isNaN([]));
  64 assertFalse(Number.isNaN("s"));
  65 assertFalse(Number.isNaN(null));
  66 assertFalse(Number.isNaN(undefined));
  67
  68 assertFalse(Number.isInteger({}));
  69 assertFalse(Number.isInteger([]));
  70 assertFalse(Number.isInteger("s"));
  71 assertFalse(Number.isInteger(null));
  72 assertFalse(Number.isInteger(undefined));
  73 assertFalse(Number.isInteger(new Number(2)));
  74 assertTrue(Number.isInteger(0));
  75 assertFalse(Number.isInteger(Number.MIN_VALUE));
  76 assertTrue(Number.isInteger(Number.MAX_VALUE));
  77 assertTrue(Number.isInteger(Number.MIN_SAFE_INTEGER));
  78 assertTrue(Number.isInteger(Number.MIN_SAFE_INTEGER - 13));
  79 assertTrue(Number.isInteger(Number.MAX_SAFE_INTEGER));
  80 assertTrue(Number.isInteger(Number.MAX_SAFE_INTEGER + 23));
  81 assertFalse(Number.isInteger(Number.NaN));
  82 assertFalse(Number.isInteger(Number.POSITIVE_INFINITY));
  83 assertFalse(Number.isInteger(Number.NEGATIVE_INFINITY));
  84 assertFalse(Number.isInteger(1/0));
  85 assertFalse(Number.isInteger(-1/0));
  86 assertFalse(Number.isInteger(Number.EPSILON));
  87
  88 assertFalse(Number.isSafeInteger({}));
  89 assertFalse(Number.isSafeInteger([]));
  90 assertFalse(Number.isSafeInteger("s"));
  91 assertFalse(Number.isSafeInteger(null));
  92 assertFalse(Number.isSafeInteger(undefined));
  93 assertFalse(Number.isSafeInteger(new Number(2)));
  94 assertTrue(Number.isSafeInteger(0));
  95 assertTrue(Number.isSafeInteger(Number.MIN_SAFE_INTEGER));
  96 assertFalse(Number.isSafeInteger(Number.MIN_SAFE_INTEGER - 13));
  97 assertTrue(Number.isSafeInteger(Number.MIN_SAFE_INTEGER + 13));
  98 assertTrue(Number.isSafeInteger(Number.MAX_SAFE_INTEGER));
  99 assertFalse(Number.isSafeInteger(Number.MAX_SAFE_INTEGER + 23));
 100 assertTrue(Number.isSafeInteger(Number.MAX_SAFE_INTEGER - 23));
 101 assertFalse(Number.isSafeInteger(Number.MIN_VALUE));
 102 assertFalse(Number.isSafeInteger(Number.MAX_VALUE));
 103 assertFalse(Number.isSafeInteger(Number.NaN));
 104 assertFalse(Number.isSafeInteger(Number.POSITIVE_INFINITY));
 105 assertFalse(Number.isSafeInteger(Number.NEGATIVE_INFINITY));
 106 assertFalse(Number.isSafeInteger(1/0));
 107 assertFalse(Number.isSafeInteger(-1/0));
 108 assertFalse(Number.isSafeInteger(Number.EPSILON));
 109
 110 var near_upper = Math.pow(2, 52);
 111 assertTrue(Number.isSafeInteger(near_upper));
 112 assertFalse(Number.isSafeInteger(2 * near_upper));
 113 assertTrue(Number.isSafeInteger(2 * near_upper - 1));
 114 assertTrue(Number.isSafeInteger(2 * near_upper - 2));
 115 assertFalse(Number.isSafeInteger(2 * near_upper + 1));
 116 assertFalse(Number.isSafeInteger(2 * near_upper + 2));
 117 assertFalse(Number.isSafeInteger(2 * near_upper + 7));
 118
 119 var near_lower = -near_upper;
 120 assertTrue(Number.isSafeInteger(near_lower));
 121 assertFalse(Number.isSafeInteger(2 * near_lower));
 122 assertTrue(Number.isSafeInteger(2 * near_lower + 1));
 123 assertTrue(Number.isSafeInteger(2 * near_lower + 2));
 124 assertFalse(Number.isSafeInteger(2 * near_lower - 1));
 125 assertFalse(Number.isSafeInteger(2 * near_lower - 2));
 126 assertFalse(Number.isSafeInteger(2 * near_lower - 7));