Test migration to jest by hand

Apparently using regular expressions is way easier.

test/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;

test/toSafeInteger/toSafeInteger.test.js

@@ -0,0 +1,28 @@
+const expect = require('expect');
+const toSafeInteger = require('./toSafeInteger.js');
+
+
+  test('toSafeInteger is a Function', () => {
+  expect(toSafeInteger).toBeInstanceOf(Function);
+});
+  test('Number(toSafeInteger(3.2)) is a number', () => {
+  expect(Number(toSafeInteger(3.2))).toBeTruthy();
+});
+  t.equal(toSafeInteger(3.2), 3, "Converts a value to a safe integer");
+  t.equal(toSafeInteger('4.2'), 4, "toSafeInteger('4.2') returns 4");
+  t.equal(toSafeInteger(4.6), 5, "toSafeInteger(4.6) returns 5");
+  t.equal(toSafeInteger([]), 0, "toSafeInteger([]) returns 0");
+  t.true(isNaN(toSafeInteger([1.5, 3124])), "isNaN(toSafeInteger([1.5, 3124])) is true");
+  t.true(isNaN(toSafeInteger('string')), "isNaN(toSafeInteger('string')) is true");
+  t.true(isNaN(toSafeInteger({})), "isNaN(toSafeInteger({})) is true");
+  t.true(isNaN(toSafeInteger()), "isNaN(toSafeInteger()) is true");
+  t.equal(toSafeInteger(Infinity), 9007199254740991, "toSafeInteger(Infinity) returns 9007199254740991");
+
+  let start = new Date().getTime();
+  toSafeInteger(3.2);
+  let end = new Date().getTime();
+  test('toSafeInteger(3.2) takes less than 2s to run', () => {
+  expect((end - start) < 2000).toBeTruthy();
+});
+  
+