SuiteScript Unit Testing

Introduction to SuiteScript Unit Testing

SuiteScript is a powerful tool for customizing NetSuite applications. Unit testing is essential to ensure that your SuiteScript functions perform as expected. In this guide, we'll explore how to use Jest, a popular testing framework, to validate functions in SuiteScript.

Setting Up Jest for SuiteScript

To start unit testing with Jest, you need to set up your environment. First, ensure you have Node.js and npm installed on your system. Then, install Jest by running:

Once Jest is installed, you can add a test script to your package.json to easily run tests:

Writing Your First SuiteScript Test

Create a test file, typically placed in a __tests__ directory. Name your test file with a .test.js extension. Here's an example of a simple SuiteScript function and its corresponding test:

Running Your Tests

To execute your tests, run the following command in your terminal:

This command will find all test files and execute them, displaying the results in your terminal.

Understanding Jest Assertions

Jest provides a rich set of assertions to validate your SuiteScript functions. The most commonly used assertion is expect, which can be combined with various matchers. For example:

In this example, toEqual is used to check that objects have the same structure and values.

Mocking in Jest

Mocking is a technique in Jest that allows you to replace functions with mock implementations. This is particularly useful for testing SuiteScript functions that depend on external services or APIs. Here's how you can mock a module:

This command will replace all functions in moduleName with mock functions. You can define how these mocks should behave using methods like mockReturnValue or mockImplementation.

Conclusion and Best Practices

Unit testing your SuiteScript code with Jest is crucial for maintaining code quality and reliability. Remember to write tests for each function, use meaningful test names, and mock dependencies where necessary. By integrating Jest into your development workflow, you can ensure that your scripts are robust and error-free.