The design of a software system is plagued with issues and problems. A developer starts with a problem in mind and writes code to solve it. What happens is, the program written gets tested, but not enough testing is done on clients or the systems that are used by those clients. So, said client crashes on them. What should be tested? Let us find it below.
What is Test Driven Development?
Test-driven development (TDD) is a software engineering technique that tests the functionality of a program before writing the actual code. It's easy to see why TDD is so popular: it helps you write better code faster, with fewer bugs and errors. And because it's based on test-driven design, your tests will be more reliable than if you were just writing them as you went along—you'll know exactly what needs to be done before writing any code at all.
What Does Code Coverage Mean?
The question of what is test driven development is related to code coverage, which is a measure of how much of the code you have written has been covered by tests. A 100% code coverage means that all the lines of your program are covered by tests, which means it's highly unlikely that any bugs will slip through.
Code coverage helps you make sure that each line in your program gets tested—not just those lines from testing frameworks like JUnit or NUnit because they're more powerful than unit tests and can run on their own (which will be discussed below). Even if this article doesn't cover them directly yet (which it won't), you should consider using one or both of these tools anyway as part of the TDD process because they'll help keep your bug count down while still allowing you to write some really neat stuff.
Three Fundamental Phases of TDD
As I mentioned above, TDD does not test client (or user) interfacing with the system. Nor does it test how users interact with the system in general: 'What happens when I press this button?' So, although TDD can be used to write high-quality code that will simply work for anyone who uses it, we must take into consideration our users and find ways to make sure all systems are working as we intend them to, along with any bugs that may exist there as well.
In addition to writing clean code for any client and potential user interaction, for most applications testing is performed so that if something doesn't work right away in terms of functionality or performance testing can be run quickly thereafter by another programmer or a QA engineer (Quality Assurance).
Benefits of TDD:
Why Is the Business Case for TDD Important?
TDD is a great way to get feedback on your code, but it's also a good way to get feedback on other things.
Is TDD The Best Way to Write Software?
The short answer is yes, TDD is the best way to write software. It's probably the only way that works well for a lot of people—and that's because it forces you to think about your code in terms of tests before you start writing any code at all. That said: not every project will benefit from using TDD as its only development approach; some projects can be written more effectively without it and others may be better suited for other techniques such as test-driven design (TDD). We recommend using the TTD techniques used by WeTest in their Mobile App Live Testing techniques in which clients get Instant access to a wide range of iOS and Android Real Devices on WeTest Cloud along with real-time debugging, ADB debugging, Test Dev and Published apps support and much more.
If you've been using TDD, you know that code coverage is a great way to see how much of your code has been covered. The tool will tell you how many lines, methods, and classes are tested (and untested) by the tests in your test suite. You can also use this information to see how much of your code has been tested: For example, if there are two tests that each test one method twice and three methods twice each, then those four methods would be covered by both tests twice - meaning they have 100% coverage!
Before we wrap up our topic of "what is test driven development", it can be summarized that TDD is a great way to write code, but it's also a great way to test your code. That's because TDD forces you to think through all the possible paths that can result in an error. You need to be able to think of all the different ways your code could fail before you can write any working code at all.