The error message "Can't make web service callouts from a method defined as TestMethod" pops up when users try to run a class or trigger which contains the text "TestMethod" in their body. This error message occurs because Salesforce does not allow web service callouts from any method defined as TestMethod.
Test methods are code written in Apex classes or triggers for the purpose of testing. Because web service callouts can be time consuming, Test methods limit time and resources, ensuring proper testing is done.
Below are some solutions to help users dealing with this error.
Remove "Testmethod" from Method Definition: If the method containing the text "TestMethod" is not necessary, just remove it. This will help in resolving the error.
Change Method Defined to "IsTest": To execute web service calls in a particular method, change this definition to "IsTest". By doing so, users are no longer limited to executing only Test Methods.
Create a Separate Apex Class and Define a Method: If the web service call needs to be tested, then create a separate Apex class and then define the method in which this web service call happens. This will allow users to utilize Test Methods that are used for testing purposes.
- Using System.isFuture(): Try utilizing the System.isFuture() method to test if a method is a Test Method or not. This method can help in determining if the method is a Test Method and if not, then run the web service call.
Q1. What is this error?
This error occurs when a user tries to execute a class or trigger, which contains text "TestMethod" in its body. As Salesforce does not allow web service callouts from any methods defined as Test Method, this error pops up.
Q2. What are Test Methods?
Test Methods are code written in Apex classes or triggers for the purposes of testing. It helps in limiting the resources and time consumed, ensuring proper testing is done.
Q3. How can this error be resolved?
This error can be rectified by either removing “TestMethod” from the method definition or by changing the method definition to “IsTest”. It could also be resolved by creating a separate Apex class and defining a method or by using System.isFuture() methods.
Q4. What is the System.isFuture() method?
The System.isFuture() is used to test if a method is a Test Method or not. This helps recognizing if the method is a Test Method and then running the web service call accordingly.
Q5. What is Salesforce?
Salesforce is a cloud-based customer relationship management (CRM) platform that provides tools for sales, service, marketing, analytics, and application development. It's used to manage customer relationships, track sales and marketing activities and store data.