Book Image

Getting Started with V Programming

By : Navule Pavan Kumar Rao
4 (1)
Book Image

Getting Started with V Programming

4 (1)
By: Navule Pavan Kumar Rao

Overview of this book

A new language on the block, V comes with a promising set of features such as fast compilation and interoperability with other programming languages. This is the first book on the V programming language, packed with concise information and a walkthrough of all the features you need to know to get started with the language. The book begins by covering the fundamentals to help you learn about the basic features of V and the suite of built-in libraries available within the V ecosystem. You'll become familiar with primitive data types, declaring variables, arrays, and maps. In addition to basic programming, you'll develop a solid understanding of the building blocks of programming, including functions, structs, and modules in the V programming language. As you advance through the chapters, you'll learn how to implement concurrency in V Programming, and finally learn how to write test cases for functions. This book takes you through an end-to-end project that will guide you to build fast and maintainable RESTful microservices by leveraging the power of V and its built-in libraries. By the end of this V programming book, you'll be well-versed with the V programming language and be able to start writing your own programs and applications.
Table of Contents (19 chapters)
1
Section 1: Introduction to the V Programming Language
4
Section 2: Basics of V Programming
12
Section 3: Advanced Concepts in V Programming

Approaches to writing and running tests

In this section, we will see how to structure tests for a simple program written in V. We will also see how to add tests to a program with modules. This section will also cover how to run tests in different ways, such as in a single _test.v file, inside a module, and running all the tests of a project. In addition, we will also see the advantage of the stats argument and the information produced in the test output when we use this argument.

Writing tests for a simple program

Let's begin by writing tests for a simple greeting application written in V. In this scenario, we will have only one module, which will be the main module. The main module will have a file named greet.v with a private function, greet, and the main function, which prints the response returned by the greet function:

module main
fn greet(name string) string {
    return 'Hello $name!'
}
fn main() {
    msg := greet...