AG Grid unit testing that gridApi functions are called
AG Grid is a powerful and flexible JavaScript data grid that allows you to create interactive tables in your web applications. It provides a rich set of features and functionalities, including the ability to manipulate and interact with data in the grid using the gridApi object. In this article, we will discuss how to write unit tests to ensure that the gridApi functions are called correctly.
Before we dive into the details of unit testing, let's briefly understand what the gridApi is and how it works. The gridApi is an object that provides a set of functions to interact with the grid, such as sorting, filtering, and updating data. It allows you to programmatically control the behavior of the grid and perform various operations on the data displayed in the grid.
To write unit tests for the gridApi functions, we need to use a testing framework such as Jasmine or Jest. These frameworks provide a set of tools and utilities to write and execute tests for JavaScript code. If you are new to unit testing or these frameworks, don't worry! We will walk you through the process step by step.
First, let's set up our testing environment. You will need to install the necessary dependencies and configure your project to run the tests. Once you have set up your testing environment, you can start writing your unit tests.
To test that the gridApi functions are called correctly, we need to create a mock object that mimics the behavior of the gridApi. This mock object will have the same functions as the gridApi, but instead of performing the actual operations, it will simply track whether the functions are called or not. We can then assert that the functions were called as expected.
Here is an example of how to create a mock gridApi object using Jasmine:
const gridApiMock = {
// Define mock functions here
sort: jasmine.createSpy('sort'),
filter: jasmine.createSpy('filter'),
updateRowData: jasmine.createSpy('updateRowData')
};
In this example, we have created a mock gridApi object with three mock functions: sort, filter, and updateRowData. We have used the jasmine.createSpy function to create a spy object for each function, which allows us to track whether the functions are called or not.
Now, let's write a unit test to ensure that the sort function is called when a specific event occurs. Here is an example of how to write the unit test using Jasmine:
it('should call sort function when sort event occurs', () => {
// Arrange
const gridOptions = {
// Set up grid options here
onSortChanged: () => {
gridApiMock.sort();
}
};
// Act
// Trigger the event that should call the sort function
// Assert
expect(gridApiMock.sort).toHaveBeenCalled();
});
In this example, we have set up the gridOptions object with an onSortChanged event handler. When the event occurs, we call the sort function of the gridApiMock object. Finally, we assert that the sort function has been called using the expect function provided by Jasmine.
Similarly, you can write unit tests for other gridApi functions such as filter and updateRowData. The process is the same: set up the gridOptions object with the appropriate event handler, trigger the event, and assert that the corresponding function of the gridApiMock object has been called.
By writing unit tests for the gridApi functions, you can ensure that your code behaves as expected and that the gridApi functions are called correctly. This helps you catch any bugs or issues early in the development process and provides confidence in the correctness of your code.
In conclusion, unit testing the gridApi functions in AG Grid is an essential part of ensuring the reliability and correctness of your code. By using a testing framework like Jasmine or Jest and creating mock objects for the gridApi, you can easily write unit tests to verify that the gridApi functions are called correctly. This allows you to catch bugs early and deliver high-quality software.
| Source | Link |
|---|---|
| AG Grid Documentation | https://www.ag-grid.com/ |
| Jasmine Documentation | https://jasmine.github.io/ |
| Jest Documentation | https://jestjs.io/ |