react app

react-app/node_modules/is-integer/test.js

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+// jshint node:true
+"use strict";
+
+// Tests taken directly from es6-shim number tests
+// https://github.com/paulmillr/es6-shim/blob/master/test/number.js
+
+var test = require("tape");
+var isInteger = require("./");
+
+// Values that are integers
+var INTEGERS = [
+  5295,
+  -5295,
+  -9007199254740991,
+  9007199254740991,
+  0,
+  -0,
+  4,
+  4.0,
+  1801439850948,
+  // Big numbers
+  Math.pow(2, 53),
+  1000000000000000000000,
+  1000000000000000000000000000000000000,
+];
+
+// Values that are not integers
+var NON_INTEGERS = [
+  4.2,
+  Infinity,
+  -Infinity,
+  NaN,
+  true,
+  false,
+  "",
+  "str",
+  null,
+  undefined,
+  function () {},
+  /a/g,
+  {},
+  {
+    valueOf: function() { return 3; }
+  },
+  {
+    valueOf: function() { return 0/0; }
+  },
+  {
+    valueOf: function() { throw 17; }
+  },
+  {
+    toString: function() { throw 17; }
+  },
+  {
+    valueOf: function() { throw 17; },
+    toString: function() { throw 42; }
+  },
+];
+
+test("integers should pass isInteger()", function(t) {
+  INTEGERS.forEach(function(val) {
+    t.ok(isInteger(val), JSON.stringify(val));
+  });
+  t.end();
+});
+
+test("non-integers should fail isInteger()", function(t) {
+  NON_INTEGERS.forEach(function(val) {
+    t.notOk(isInteger(val), JSON.stringify(val));
+  });
+  t.end();
+});