Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test6/toSafeInteger/toSafeInteger.js

@@ -0,0 +1,3 @@
+const toSafeInteger = num =>
+Math.round(Math.max(Math.min(num, Number.MAX_SAFE_INTEGER), Number.MIN_SAFE_INTEGER));
+module.exports = toSafeInteger;

test6/toSafeInteger/toSafeInteger.test.js

@@ -0,0 +1,23 @@
+const expect = require('expect');
+const toSafeInteger = require('./toSafeInteger.js');
+
+test('Testing toSafeInteger', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof toSafeInteger === 'function').toBeTruthy();
+  expect(Number(toSafeInteger(3.2))).toBeTruthy();
+  expect(toSafeInteger(3.2)).toBe(3);
+  expect(toSafeInteger('4.2')).toBe(4);
+  expect(toSafeInteger(4.6)).toBe(5);
+  expect(toSafeInteger([])).toBe(0);
+  expect(isNaN(toSafeInteger([1.5, 3124]))).toBeTruthy();
+  expect(isNaN(toSafeInteger('string'))).toBeTruthy();
+  expect(isNaN(toSafeInteger({}))).toBeTruthy();
+  expect(isNaN(toSafeInteger())).toBeTruthy();
+  expect(toSafeInteger(Infinity)).toBe(9007199254740991);
+
+  let start = new Date().getTime();
+  toSafeInteger(3.2);
+  let end = new Date().getTime();
+  expect((end - start) < 2000).toBeTruthy();
+});