Updated the test system

test/toSafeInteger.test.js

@@ -0,0 +1,42 @@
+const expect = require('expect');
+const {toSafeInteger} = require('./_30s.js');
+
+test('toSafeInteger is a Function', () => {
+  expect(toSafeInteger).toBeInstanceOf(Function);
+});
+test('Number(toSafeInteger(3.2)) is a number', () => {
+  expect(Number(toSafeInteger(3.2))).toBeTruthy();
+});
+test('Converts a value to a safe integer', () => {
+  expect(toSafeInteger(3.2)).toBe(3);
+});
+test("toSafeInteger('4.2') returns 4", () => {
+  expect(toSafeInteger('4.2')).toBe(4);
+});
+test('toSafeInteger(4.6) returns 5', () => {
+  expect(toSafeInteger(4.6)).toBe(5);
+});
+test('toSafeInteger([]) returns 0', () => {
+  expect(toSafeInteger([])).toBe(0);
+});
+test('isNaN(toSafeInteger([1.5, 3124])) is true', () => {
+  expect(isNaN(toSafeInteger([1.5, 3124]))).toBeTruthy();
+});
+test("isNaN(toSafeInteger('string')) is true", () => {
+  expect(isNaN(toSafeInteger('string'))).toBeTruthy();
+});
+test('isNaN(toSafeInteger({})) is true', () => {
+  expect(isNaN(toSafeInteger({}))).toBeTruthy();
+});
+test('isNaN(toSafeInteger()) is true', () => {
+  expect(isNaN(toSafeInteger())).toBeTruthy();
+});
+test('toSafeInteger(Infinity) returns 9007199254740991', () => {
+  expect(toSafeInteger(Infinity)).toBe(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();
+});