Yes it is, via Unit Testing.
Usually in a Smart Connector extension, there are at least two projects: the extension and the test project. What you would need to do to start:
1. Download a Test Runner, an external app or Visual Studio add-in that will let you test this code as it executes. If you already have something called ReSharper installed, then you have this.
a. From Visual Studio, Tools --> Extensions and Updates
b. Select "Online - Visual Studio Gallery"
c. In the Search field, type "NUnit" (this is the recommened one)
d. Download and Install NUnit Test Adapter 3
2. Install the Smart Connector Runtime. You can find out how to do this in Section 4 of the Smart Connector Installation and Configuration Guide, let me know if you don't have that
3. Add a new Class Library project to your Solution and preferably name it "[extensionName].Test"
4. Create your Unit Testing project. This is covering in Chapter 9 of the "Smart Connector Developer - Video Series" series on MyLearningLink. If you do not have access to that, tell me and I can link you to the series hosted on Teachable.com. It is a video adaptation of the Smart Connector Developer's Guide.
The material I mentioned in Step 4 will go over coding Unit tests and several other subtleties about the tests. There are three types that you will eventually set up: the one you want to run to test Execute_Sublcass is the ExecuteTest.
