Which equals operator (== vs ===) should be used in JavaScript ...
Dec 11, 2008 · When using === for JavaScript equality testing, everything is as is. Nothing gets converted before being evaluated. var1 == var2. When using == for JavaScript equality …
How do you performance test JavaScript code? - Stack Overflow
Sep 21, 2008 · If the reader doesn't know the difference between benchmark, workload and profilers, first read some performance testing foundations on the "readme 1st" section of …
How can I check for "undefined" in JavaScript? - Stack Overflow
@JamiePate: Just to be clear, I disagree that 'xyz' in window is a better answer than typeof xyz == "undefined" because it is testing the wrong thing. The in operator checks for the existence of a …
What is the correct way to check for string equality in JavaScript ...
Aug 27, 2010 · There are actually two ways in which strings can be made in javascript. var str = 'Javascript'; This creates a primitive string value. var obj = new String('Javascript'); This …
JavaScript unit test tools for TDD - Stack Overflow
Nov 19, 2008 · QUnit focuses on testing JavaScript in the browser while providing as much convenience to the developer as possible. Blurb from the site: QUnit is a powerful, easy-to-use …
How do I check for null values in JavaScript? - Stack Overflow
Jan 4, 2024 · AFAIK in JAVASCRIPT when a variable is declared but has not assigned value, its type is undefined. so we can check variable even if it would be an object holding some …
jquery - The 'describe' keyword in javascript - Stack Overflow
Aug 31, 2012 · Describe is a function in the Jasmine testing framework. It simply describes the suite of test cases enumerated by the "it" functions. It simply describes the suite of test cases …
What is “assert” in JavaScript? - Stack Overflow
There are many comments saying assertion does not exist in JavaScript but console.assert() is the assert function in JavaScript The idea of assertion is to find why/where the bug occurs. …
How to check for an undefined or null variable in JavaScript?
JavaScript has all sorts of implicit conversions to trip you up, and two different types of equality comparator: == and ===. A function, test(val) that tests for null or undefined should have the …
How can I unit test non-exported functions? - Stack Overflow
Oct 3, 2020 · @IgorSoloydenko On the contrary. I came to that conclusion for 100% pragmatic reasons. The reason testing non-exported function is unpragmatic is that refactoring will cause …