Return to the home screen, open the Salesforce mobile app, and navigate to the bike Lightning web component. Open Chrome on your desktop. In the location bar, enter chrome://inspect/#devices. Click Inspect under the Remote Target emulator you’re working with.
Full Answer
How to test lightning component in Salesforce?
This is the easiest and quickest way to test and view your lightning component. 2. Make a component tab and then include that tab inside salesforce1 navigation tab. and then open the salesforce1 app and test it.
What is LTS testing in Salesforce?
Testing Components with Lightning Testing Service Use Lightning Testing Service (LTS) to ensure your components perform as expected. LTS is a full suite of tools and services integrated with Salesforce DX to make testing easy. Automated tests are the best way to achieve predictable, repeatable assessments of the quality of your custom code.
How do I test the Lightning Experience API?
To test how these components handle data and errors from the wire service, use the @salesforce / sfdx - lwc - jest test utility. The content and structure of HTML, CSS, and the DOM in Lightning Experience can change at any time and can’t be considered a stable API.
What is the Jasmine testing framework in Salesforce Lightning?
However, Javascript is an open language that Salesforce doesn’t control. The Javascript ecosystem has developed a number of testing frameworks, such as Jasmine, Mocha, and Jest. Rather than reinventing the wheel, the Lightning Platform provides wrapper libraries for Jasmine and Mocha. In this step, we discuss the Jasmine testing framework.
Why install sfdx-lwc-jest?
Install sfdx-lwc-jest so that you have the Jest test runner for Lightning Web Components ready.
How to run a test case in LWC?
To run selected tests, hover over the name of a test case or file to reveal a play icon from the LWC test view. Click the play icon (hover text: SFDX: Run Lightning Web Component Test Case, SFDX: Run Lightning Web Component Test File) to run a test case or all the test cases in a file. To run all of tests in the view, click the larger play icon at the top of the LWC Tests view (hover text: SFDX: Run All Lightning Web Component Tests).
How to debug a JEST test case?
To debug all test cases in a Jest test file, click the debug icon on the menu bar in the top right corner of the editor window.
What color is the test result?
Test results are noted as follows: green for passing tests, red for failing tests, or orange for skipped tests.
Where to find unit tests in JEST?
You can run or debug Jest unit tests in contextual actions within the file, or by clicking buttons from the menu bar in the top right corner of the editor window. View test results in the Terminal panel.
What is the Lightning Test Service?
The Lightning Testing Service provides a utility object $T, which lets you create components and manipulate data. This facilitates testing.
What is Lightning component?
Lightning components contain several files that define different aspects of the component. For example, a component can contain a CSS file, a Javascript controller, and a design file in addition to the components markup file. Because Lightning components often contain client-side Javascript controllers, you need to test that logic.
What is Jasmine testing?
Jasmine is a behavior-driven development testing framework . With this framework, you don’t make assertions about what a calculation is or which exception is thrown. Instead, Jasmine has you make expectations about which behavior occurs. So, instead of asserting that the output of method A should be XYZ, we tell Jasmine to expect method A to be called once, and its return value should be XYZ.
How does Jasmine organize tests?
Jasmine organizes its tests into suites using the describe keyword. Each individual test starts with the IT function call.
Does Salesforce use JavaScript?
However, Javascript is an open language that Salesforce doesn’t control.
Can you run Lightning Test Service from command line?
If you’d like to execute your Lightning Test Service–based tests from the command line, you’re in luck. If you install the Lightning Test Service from the DX command line, you can execute your tests directly from the command line. For more information on how that works, see the Lightning Test Service readme on github.
Does Lightning have JavaScript?
Development on the Lightning Platform these days includes more than just Apex. It includes client-side Javascript in Lightning component controllers. Testing these involves a few specialized tools. This video introduces them.
What is Lightning Usage App?
If you’re an admin, you probably know that the Lightning Usage App is a great way to track adoption and usage of Lightning Experience. But did you know that you can also use it to get an overall view of how your pages are performing?
How to open the Lightning app?
To open the Lightning Usage App, click the App Launcher and search for Lightning Usage. Once it’s open, you can use the Activity and Usage sections to dig into your data. Let’s say you want to see how your org’s most viewed pages are performing.
What does EPT mean in Salesforce?
Remember the last time you had to wait longer than expected for a web page to load? What felt like hours likely took just seconds (or maybe even milliseconds), but the time it takes a page to load can mean the difference between a great user experience and a flurry of support tickets. As you may recall from the previous unit, Experienced Page Time (EPT) is how Salesforce measures the time it takes to download and display the entire content of a webpage in a browser window. In other words, measuring EPT is really about ensuring your users get the best user experience possible.
How to measure page performance?
To measure page performance in Event Monitoring, use the Lightning Page View event type. The Lightning Page View event type tracks information such as the page a user visited, the browser they used, how long the user spent on the page, and the load time for the page. In the example below, you can see metrics for when a user accessed the page (“pageStartTime”), how long they spent on the page (“duration”), and the Experienced Page Time (“EPT”).
Can you use Lightning to see EPT?
You can also use the Lightning Usage App to see how browser performance affects EPT. In the example below, you can see that pages opened in the Salesforce mobile app loaded more quickly than pages loaded in desktop browsers such as Firefox or Internet Explorer.
Can you use different event types to monitor other aspects of performance?
You can also use different event types to monitor other aspects of performance. The following are just a few examples.
Can you use Lightning Usage App to create custom reports?
If you want more fine-grained analysis of how your pages are performing, you can also use Lightning Usage App objects to create custom reports .
Components for Testing
All of the testable components have names beginning with “eg” (from the abbreviation “e.g.”, meaning for example). They contain extensive comments to guide you through each one. Access the components provided in the package as you would access any Aura component.
Test Suites
The example tests are included in static resources. You can also review them directly in the LightningTestingService repo, in the lightning-component-tests/test/default/staticresources directory.
Inside the Framework Lifecycle
You don’t need a cmp.isValid () check in the callback in a client-side controller when you reference the component associated with the client-side controller. The framework automatically checks that the component is valid.
Outside the Framework Lifecycle
If you reference a component in asynchronous code, such as setTimeout () or setInterval (), or when you use Promises, a cmp.isValid () call checks that the component is still valid before processing the results of the asynchronous request.