Using ViewInspector to test a simple view

The view we are going to build will be used to add new to-do items to the list of items. This means it needs input fields for all information a to-do item can hold. So, let's look into that aspect in the next subsections.

Adding a title text field

As always, we start with the test. Follow these steps to add a text field for the title of a to-do item to the input view:

1. Select the ToDoTests group in the project navigator and add a Unit Test Case Class with the name ToDoItemInputViewTests. Remove the two template test methods.
2. Import the ViewInspector library and the main target (ToDo) so that it is testable (@testable):

   // ToDoItemInputViewTests.swift
   import XCTest
   @testable import ToDo
   import ViewInspector

3. Before we can write tests for a SwiftUI view, we first need to extend it with the Inspectable protocol from the ViewInspector library. Add the following line right above the test case class:

   // ToDoItemInputViewTests...