Hi Everyone,

I've got a class that uses Box's Toolkit to make a callout to change a folder's name - it's invocable and is triggered on Salesforce record name change (and works!)

Coming into difficultly running the test class as I'm getting the error message of "System.TypeException: Supplied type is not an interface" when running the test class with the Stack Trace of "(System Code)
Class.BoxFolderRenamerTest.testRenameBoxFolder: line 34, column 1"

Any ideas how to change the test class to provide coverage?
 

public class BoxFolderRenamer {
    
    @InvocableMethod(label='Rename Box Folder' description='Renames a Box folder')
    public static void renameBoxFolder(List<BoxFolderRenameRequest> requests) {
        
        // Instantiate the Toolkit object
        box.Toolkit boxToolkit = new box.Toolkit();
        
        for (BoxFolderRenameRequest request : requests) {
            // Prepare the API endpoint URL for folder renaming
            String endpointUrl = 'https://api.box.com/2.0/folders/' + request.folderId;
            
            // Create a Map for the new folder name
            Map<String, Object> folderUpdate = new Map<String, Object>();
            folderUpdate.put('name', request.newName);
            
           // Create a new HttpRequest object and set appropriate values
            HttpRequest httpRequest = new HttpRequest();
            httpRequest.setHeader('Content-Type', 'application/json');
            httpRequest.setEndpoint(endpointUrl);
            httpRequest.setMethod('PUT');
            httpRequest.setBody(JSON.serialize(folderUpdate));
            
            //HttpResponse httpResponse = new Http().send(httpRequest);
            // Send the HttpRequest through the generic Toolkit method, which will handle the authentication details
            HttpResponse httpResponse = boxToolkit.sendRequest(httpRequest);
            
            // Handle the response as needed
            if (httpResponse.getStatusCode() != 200) {
                System.debug('Response Code: ' + httpResponse.getStatusCode() + '. Response Status: ' + httpResponse.getStatus());
                system.debug('most recent error: ' + boxToolkit.mostRecentError);
            }
        }
        
        // ALWAYS call this method when finished. Since salesforce doesn't allow http callouts after dml operations, we need to commit the pending database inserts/updates or we will lose the associations created
        boxToolkit.commitChanges();
    }
    
    // Wrapper class for the Box folder rename request - variables to be passed from Flow
    public class BoxFolderRenameRequest {
        @InvocableVariable(label='Folder ID' required=true)
        public String folderId;
        
        @InvocableVariable(label='New Folder Name' required=true)
        public String newName;
    }
}

Test Class

@isTest
public class BoxFolderRenamerTest {
    // Create a mock HTTP callout response
    public class MockHttpResponse implements HttpCalloutMock {
        public HTTPResponse respond(HTTPRequest request) {
            HttpResponse httpResponse = new HttpResponse();
            httpResponse.setHeader('Content-Type', 'application/json');
            httpResponse.setBody('{"status": "success"}');
            httpResponse.setStatusCode(200);
            return httpResponse;
        }
    }
    @isTest
    public static void testRenameBoxFolder() {
        // Create test data
        List<BoxFolderRenamer.BoxFolderRenameRequest> testRequests = new List<BoxFolderRenamer.BoxFolderRenameRequest>();
        // Add test request(s)
        BoxFolderRenamer.BoxFolderRenameRequest request1 = new BoxFolderRenamer.BoxFolderRenameRequest();
        request1.folderId = 'folderId';
        request1.newName = 'New Folder Name';
        testRequests.add(request1);
        // Set the mock HTTP callout response
        Test.setMock(HttpCalloutMock.class, new MockHttpResponse()); 
        // Invoke the renameBoxFolder method
        Test.startTest();  
        BoxFolderRenamer.renameBoxFolder(testRequests); 
        Test.stopTest();
    }
}