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Getting Started with V Programming

Getting Started with V Programming

By : Pavan Kumar Rao
4.4 (16)
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Getting Started with V Programming

Getting Started with V Programming

4.4 (16)
By: 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)
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1
Section 1: Introduction to the V Programming Language
4
Section 2: Basics of V Programming
12
Section 3: Advanced Concepts in V Programming

Introduction to tests in V

Writing tests in V is straightforward. In this section, we will explore three simple concepts that will get you started with writing tests in V. They are as follows:

  • Use the assert keyword to compare the actual and expected outcome.
  • A file containing tests must end with the _test.v extension.
  • Each test is a function and must start with the prefix test_.

In the next subsection, we will learn the syntax of the assert keyword and its usage in V.

The assert keyword

In V, you can use the assert keyword to compare the outcome of a function you are writing tests for with the expected outcome. Following is the syntax that shows how to use the assert keyword in V followed by a Boolean expression:

assert boolean_expression

In the preceding syntax, we can see that the assert keyword is followed by an expression whose output must always evaluate to a Boolean result. If the Boolean result is true then the assertion succeeds, otherwise...

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