HttpCalloutMock Test class Failing

Question

I have a Class using MetadataService and different methods of it. I want to create a test class for the same but it is giving an error that my test class have HTTP callouts. I am using the HttpCalloutMock but still it is giving me the same error. The Class is using MetadataService, and it is calling multiple callouts which may be the problem

@isTest
private class CustomLabelHelperTest {

    static testMethod void createServiceTestMethod()
    {  
        Test.setMock(HttpCalloutMock.class, new MockHttpResponseGenerator());
        Test.startTest();
        MetadataService.MetadataPort service = CustomLabelHelper.createService();
        Test.stopTest(); 
    }

    static testMethod void readCustomLabelsTestMethod()
    {  
        Test.setMock(HttpCalloutMock.class, new MockHttpResponseGenerator());
        Test.startTest();
        Map<String, CustomLabelHelper.CustomLabelData> customLabelDataMap = CustomLabelHelper.readCustomLabels();
        Test.stopTest(); 
    }
}

Here my first method is getting passed but the second method is failing.

Answer 1

Are you using raw HTTP Callouts or SOAP calls via WSDL2Apex? The MetadataService.MetadataPort makes me suspect the latter.

In that case, your mock class needs to implement WebServiceMock rather than HttpCalloutMock. Then it will correctly mock the SOAP web service response.