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...