Code Coverage requirements for External Services and Flows in Unlocked Packages

Question

I created an unlocked Salesforce package that contains an External Service and an Inactive Autolaunched Flow that calls methods in the External Service. The package does not contain any Apex classes other than those auto-generated when creating the External Service. However, I am unable to promote my package to a production release version because it is saying that I haven't met the code coverage requirements.

What needs to have code coverage? The External Service? The Flow?

I read that Flow testing requirements apply only when DEPLOYING them as active, but does that apply to packaging as well?

Answer 1

If you are deploying apex classes, they must have code coverage (which should include asserts). It doesn't matter where the classes came from.

• External Services generated Apex code is really a convenience to the developer to not have to write boilerplate code

• The documentation goes through several examples of how to test external services Apex code that includes showing you how to write the testmethods

Here's one from the doc

@IsTest
public class MyAtmApexTest {
    @IsTest
    static public void testMyAtmCallout() {
        // Set HTTP callout mock
        Test.setMock(HttpCalloutMock.class, new MyAtmHttpCalloutMock());
    
        // Call with the expected mock accountId and pin
        ExternalService.MyAtmExternalService myAtm = 
            new ExternalService.MyAtmExternalService();
        ExternalService.MyAtmExternalService.getBalance_Request request =
            new ExternalService.MyAtmExternalService.getBalance_Request();
        request.accountId = 'A123-456';
        request.pin = 1234;
        ExternalService.MyAtmExternalService_getBalance_OUT_200 actual = 
            myAtm.getBalance(request).Code200;

        // Assert the response variables
        ExternalService.MyAtmExternalService_getBalance_OUT_200 expected =
            new ExternalService.MyAtmExternalService_getBalance_OUT_200();
        expected.availableBal = 0;
        expected.name = 'Account Holder';
        expected.z0type = 'Checking';
        expected.accountId = 'A123-456';
        System.assertEquals(expected.toString(), actual.toString());
    }
}