Cypress is a fantastic tool for automated testing, and it becomes even more powerful when you dive into custom commands. If you're wondering how to get the returned value from custom commands in Cypress promises, you're in the right place! This article will guide you through the process step by step.
When you create a custom command in Cypress, it allows you to encapsulate repetitive actions into reusable functions. This not only makes your test code cleaner but also more maintainable. However, when you want to retrieve a value from a custom command, it's essential to understand how promises work in Cypress.
To get the returned value from a custom command, you must use promises effectively. When you invoke a custom command that returns a promise, you need to handle that promise appropriately to access the value it resolves to. Cypress provides a straightforward way to achieve this using the `then()` method.
Here's an example of how you can retrieve the returned value from a custom command that returns a promise:
Cypress.Commands.add('getCustomValue', () => {
return new Cypress.Promise(resolve => {
resolve('Hello, world!');
});
});
Cypress.Commands.add('useCustomValue', () => {
cy.getCustomValue().then(value => {
// Use the value returned from the custom command
cy.log(value);
});
});In this example, the `getCustomValue` custom command returns a hardcoded string 'Hello, world!' wrapped in a promise using `Cypress.Promise`. The `useCustomValue` custom command uses `then()` to access the resolved value from `getCustomValue` and logs it to the Cypress test runner.
When you run your test that invokes `useCustomValue`, you should see 'Hello, world!' logged in the Cypress test runner output. This demonstrates how you can effectively retrieve the returned value from a custom command in Cypress promises.
Remember that handling promises correctly is crucial in Cypress to avoid unexpected behavior in your tests. You may encounter situations where you need to chain multiple promises together, especially when dealing with asynchronous operations.
By mastering how to get the returned value from custom commands in Cypress promises, you can enhance the capabilities of your automated tests and make them even more robust. Don't hesitate to experiment with custom commands and promises in Cypress to streamline your testing workflow.
Keep exploring the possibilities that Cypress custom commands offer, and don't hesitate to leverage promises to work with returned values effectively. Happy testing!